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DFI Hybrid Motherboard HD Video Preview (P45 + ION — Two Systems, One Mobo)

DFI invited us exclusively out to its headquarters in Taipei to look at its upcoming Hybrid P45-ION that supports two systems on a single motherboard. | Sep 18, 2009 7:31 AM CDT

Foxconn Concerto G45 Motherboard Preview

In an exclusive preview from Foxconn, we have the latest beta release of the Concerto motherboard featuring Intel G45. | Sep 14, 2008 11:00 PM CDT

ASRock P43 and P45 Motherboards Reviewed

Today we have a double header for you from ASRock with their P45 and P43 top rocks. | Aug 3, 2008 11:00 PM CDT

Intel P45 Preview — GIGABYTE DS3R + DQ6

P45 has been making its name heard, but what does it offer? Today we have two new GIGABYTE mobos for an early preview! | May 22, 2008 11:00 PM CDT

Intel P35 Motherboards — Five In The Pit

Today we check out five P35 boards from ASUS, ABIT, ECS, Foxconn and Gigabyte to help make your decision easier. | Aug 9, 2007 11:00 PM CDT

Intel P965 Shootout Part 2 — Gigabyte, ABIT and Biostar

Today we bring you Part 2 of our Intel P965 motherboard roundup checking out products from Gigabyte, ABIT and Biostar. | Nov 26, 2006 11:00 PM CST

Intel P965 Shootout Part 1 — ASUS, MSI and Foxconn

In part 1 of our Intel P965 roundup we check our motherboards from ASUS, Foxconn and MSI — which is best for you? | Oct 9, 2006 11:00 PM CDT

ABIT AW9D-MAX Motherboard — Core 2’s new Best Friend?

It’s been a while but now we have an ABIT board and it doesn’t disappoint — come for a ride and check out the AW9D-MAX. | Oct 3, 2006 11:00 PM CDT

DFI vs. MSI — Conroe 975X Motherboards Tested

Today we look at two 975X motherboards from DFI and MSI. We’ll overclock them and work out which is your best choice. | Sep 18, 2006 11:00 PM CDT

Intel P965 chipset examined with Gigabyte 965P-DQ6

Today we compare Intel 975X vs. P965 chipset performance with Gigabyte’s classy Core 2 Duo based 965P-DQ6 motherboard. | Aug 22, 2006 11:00 PM CDT

MSI 945GT Speedster-A4R supporting Core Duo Mobile

MSI sent us their 945GT Speedster motherboard with support for Core Duo mobile processors. We compare against Pentium M. | Aug 1, 2006 11:00 PM CDT

Mobile on Desktop MSI style — 915GM Speedster-FA4 (now with Overclocking)

Last time it was Core Duo, this time we take a look at MSI’s Mobile on Desktop board using the older Pentium M CPU. | May 28, 2006 11:00 PM CDT

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CPU Replacement — iFixit

The exact steps required to replace a processor depend on many factors, including the type of processor, CPU cooler, motherboard, and case you are using. In the following sections, we illustrate the procedure for replacing a Socket 478 processor. Most other processors, including Socket 462 (A), Socket 754, and Socket 939 models, require similar steps. Socket 775 processors differ significantly, so we illustrate the installation of a Socket 775 processor separately.

Cleanliness Is Next to Goodliness One of our tech reviewers suggests precleaning the system in a less dirt-sensitive location, such as a garage workbench, prior to moving the computer onto the kitchen table for the balance of the process. This precaution enhances domestic bliss and increases the possibility of budget increases when it comes time for the next upgrade.

A NASTY CRACK If you decide to install the processor with the motherboard in place, be very careful about how much pressure you apply when installing the new CPU cooler. Applying too much pressure when you install the CPU cooler can crack the motherboard.

The first step in replacing the processor is to remove the old processor. To do so, take the following steps:

Disconnect the power cord, monitor, keyboard, mouse, and other external peripherals, and move the system to a well-lit work area. Again, the kitchen table is traditional. Remove the cover from the case and clean the system thoroughly, inside and out. There are few things less pleasant than working on a filthy system.
Examine the system to decide whether to remove the motherboard before proceeding or to install the new processor with the motherboard in place. That decision depends on many factors, including your level of experience in replacing processors, the amount of working room available inside the case, the type of clamping mechanism used to secure the CPU cooler, and so on. If in doubt, remove the motherboard.
If you elect to remove the motherboard, record the locations of every cable that connects to it. Many people use a digital camera for that purpose. Disconnect all of the cables and remove the screws that secure the motherboard to the case. Ground yourself by touching the case structure or the power supply, lift the motherboard out of the case, and place it on a flat, nonconductive surface.
If you haven’t done so already, remove the cable that connects the CPU cooler fan to the motherboard power header. Release the clamp or clamps that secure the CPU cooler to the motherboard, and attempt to lift the CPU cooler away from the motherboard, using very gentle pressure. If necessary, you can slide the CPU cooler back and forth very gently in the horizontal plane, keeping its base parallel to the motherboard.
Set the original CPU cooler aside. If you plan to salvage it and the original processor (why not?), remove the remnants of the thermal compound from the base of the cooler. You can often do so just by rubbing the base with your thumb to remove the compound, which usually has the consistency of rubber cement. If the thermal compound is too persistent, try using the edge of a credit card or a knife to scrape off the compound. Be careful to avoid scratching the surface of the cooler. Goof-Off or a similar solvent may also be helpful. Some people even use fine steel wool, but if you do that, make sure that no small pieces remain on the cooler. If you use the cooler later, even a tiny piece of steel wool can short out the processor or the motherboard, causing all sorts of problems.
With the CPU cooler removed, the processor is visible in its socket. If you intend to salvage the processor for later use, it’s a good idea to remove the remnants of the thermal compound while the CPU is still seated in the socket, where it is well grounded and protected from injury. You can do so by rubbing gently with your thumb or by using the edge of a credit card as a scraper. Once again, use a hair dryer to warm the processor if you have difficulty removing the thermal compound.
Once the processor is clean, lift the ZIF lever to release the clamping pressure on the socket and then lift the processor from the socket. It should separate from the socket without any resistance at all. If it does not, you can apply gentle pressure to separate it, but be very careful not to bend (or snap off) any of the fragile processor pins. Even if you don’t plan to reuse the processor, a snapped-off pin may render the motherboard useless.
For the time being, place the processor pins-up on a flat, nonconductive surface such as the tabletop. Later on, you can use the packaging from the new processor to store the old processor.

GENTLE PERSUASION If the CPU cooler doesn’t break loose with gentle persuasion, don’t yank it. The thermal compound between the CPU cooler and the CPU sometimes sets up like glue. Pulling too hard can pull the CPU right out of the socket, damaging the old CPU and possibly the socket. If that happens, you may have to replace the motherboard.If you’re working with the motherboard in situ, turn the computer on and let it run for a few minutes to warm the processor, which melts the thermal compound and makes it easier to break the bond. If you’ve removed the motherboard, point a hair dryer at the CPU cooler and CPU and let it run for several minutes, until the CPU cooler becomes warm to the touch. At that point, the CPU cooler should separate easily from the CPU.

The exact procedure needed to install a processor varies slightly for different processors and CPU coolers, but the general procedure is similar. In this section, we illustrate the procedure for installing a Socket 478 Pentium 4 processor, but the procedure is identical for a Celeron, and nearly so for Socket 462 (A), Socket 754, and Socket 939 Athlon 64 and Sempron processors. The only real difference is how the CPU cooler is secured, and that should be obvious to you when you examine your particular CPU cooler.

SOMEONE ALWAYS HAS TO BE DIFFERENT

Socket 775 Intel processors use a slightly different procedure. Rather than being secured with a ZIF lever that clamps the processor pins, Socket 775 processors seat loosely in the socket and are secured by clamping the processor body with a retaining mechanism that is part of the socket. See the following section for details.

We chose a retail-boxed processor to illustrate this section. One advantage of a retail-boxed processor is that it comes with a competent CPU cooler that is guaranteed to be compatible with the processor, and typically costs only a few dollars more than the bare OEM processor. The CPU coolers that Intel and AMD currently bundle with their retail-boxed processors are quite good, especially considering the low incremental cost of buying the bundle. The bundled coolers aren’t quite as efficient or as quiet as the best aftermarket CPU coolers, but they suffice for most purposes.

Our retail-boxed Pentium 4 processor, shown in Figure 5-9, includes the processor itself and a large Intel-branded CPU cooler. The plastic packaging Intel uses is treacherous. We eventually got the package open using scissors, but for a time we thought we’d have to resort to a chain saw.

Figure 5-9: The retail-boxed Intel Pentium 4 processor and heatsink/fan

OPEN SESAME

Don’t try to pry the package open using just your fingers. Robert did that once with an Intel retail-boxed processor. When the package finally popped, the heat-sink/fan unit went sailing across the room and the processor landed in his lap. (Thank goodness it wasn’t the converse. ) AMD packaging is also obnoxious, but not as bad as Intel packaging.

The first step is to lift the arm of the ZIF (zero insertion force) socket, as shown in Figure 5-10, until it is vertical. With the arm vertical, there is no clamping force on the socket holes, which allows the processor to drop into place without requiring any pressure.

Figure 5-10: Lift the socket lever to prepare the socket to receive the processor

Zero Means Zero

Never apply pressure to seat the processor. You’ll bend the pins and destroy the processor. Note that closing the ZIF lever may cause the processor to rise up slightly from the socket. If this happens, raise the lever again and reseat the processor. After the processor is fully seated, it’s safe to apply gentle pressure with your finger to keep it in place as you close the ZIF lever.

Correct orientation is indicated on the processor and socket by some obvious means. For Socket 478, the processor has a trimmed corner and the socket a small triangle, both visible in Figure 5-11 near the ZIF socket lever. With the socket lever vertical, align the processor with the socket and drop the processor into place, as shown in Figure 5-11. The processor should seat flush with the socket just from the force of gravity, or with at most a tiny push. If the processor doesn’t simply drop into place, something is misaligned. Remove the processor and verify that it is aligned properly and that the pattern of pins on the processor corresponds to the pattern of holes on the socket.

Figure 5-11: Align the processor with the socket and drop it into place

With the processor in place and seated flush with the socket, press the lever arm down and snap it into place, as shown in Figure 5-12. You may have to Cleanliness Counts press the lever arm slightly away from the socket to allow it to snap into a locked position.

Figure 5-12: Snap the ZIF socket lever into place to lock the processor into the socket

Cleanliness Counts

If the processor has previously been used, clean off any remaining thermal compound or the remnants of the thermal pad before you install the heatsink/fan unit. You can remove old thermal compound using Goof-Off or isopropyl alcohol on a cloth, or by polishing the processor gently with 0000 steel wool. If you use steel wool, which is conductive, make absolutely sure that no stray bits of it remain after you finish polishing the processor. Even a tiny piece of steel wool can short out the processor or another motherboard component, with disastrous results. Better yet, use steel wool only when the processor is away from the motherboard, prior to installation.

To install the CPU cooler, begin by polishing the top of the processor with a paper towel or soft cloth, as shown in Figure 5-13. (Our editor, Brian Jepson, notes that he’s become fond of coffee filters, as they are abrasive enough to polish, and so far haven’t scratched anything. Plus, they don’t seem to leave any debris.) Remove any grease, grit, or other material that might prevent the heatsink from making intimate contact with the processor surface.

Figure 5-13: Polish the processor with a paper towel before installing the CPU cooler

Next, check the contact surface of the heatsink, shown in Figure 5-14. If the heatsink base is bare, that means it’s intended to be used with thermal compound, usually called «thermal goop.» In that case, also polish the heatsink base.

Figure 5-14: The base of the Intel heatsink, showing the circular copper area that contacts the processor

Some heatsinks have a square or rectangular pad made of a phase-change medium, which is a fancy term for a material that melts as the CPU heats and solidifies as the CPU cools. This liquid/solid cycle ensures that the processor die maintains good thermal contact with the heatsink. If your heatsink includes such a pad, you needn’t polish the base of the heatsink. (Heatsinks use either a thermal pad or thermal goop, not both.)

ALUMINUM VERSUS COPPER

The heatsink shown in Figure 5-14 is a so-called «AlCu» hybrid unit, for the chemical symbols for aluminum and copper. The body of the heatsink is made from aluminum, and the contact surface for the processor from copper. Copper has better thermal properties, but is much more costly than aluminum.

Inexpensive heatsinks and those designed for slower, cooler-running processors use aluminum exclusively. Heatsinks designed for fast, hot-running processors (and for overclockers) use copper exclusively. Hybrid heatsinks balance cost and performance by using copper only where heat transfer properties are critical.

Different Goops

Don’t worry if your heatsink or thermal compound differs from those in the illustrations. The type of heatsink and thermal compound supplied with retail-boxed processors varies from model to model and may also vary within a model line.

When we replace a heatsink, we use Antec Silver Thermal Compound, which is widely available, inexpensive, and works well. Don’t pay extra for «premium» brand names like Arctic Silver. They cost more than the Antec product and our testing shows little or no difference in cooling efficiency.

Intel never uses a cheap method when a better solution is available, and the packaging for their thermal compound is no exception. Rather than the usual single-serving plastic packet of thermal goop, Intel provides thermal goop in a syringe with a premeasured dose. To apply the thermal goop, put the syringe tip near the center of the processor and squeeze the entire contents of the syringe onto the processor surface, as shown in Figure 5-15.

Figure 5-15: Apply thermal compound

Too Much Is as Bad as Too Little

Incidentally, the premeasured thermal goop syringe shown here illustrates the proper amount of goop for any modern AMD or Intel processor. If you’re applying goop from a bulk syringe, squeeze out only the amount shown here, about 0.1 milliliter (mL), which may also be referred to as 0.1 cubic centimeter (CC). Most people tend to use too much. (Some older processors, such as the AMD Athlon XP, have smaller heat spreaders and so require a correspondingly smaller amount of goop.)

If you apply too much thermal goop, the excess squooshes out from between the heatsink base and the CPU surface when you put the heatsink in place. Good practice suggests removing excess goop from around the socket, but that may be impossible with a large heatsink, because the heatsink blocks access to the socket area. Standard silicone thermal goop does not conduct electricity, so there is no danger of excess goop shorting anything out.

If you’re a neatnik, use your finger (covered with a latex glove or plastic bag) to spread thin layers of goop on the processor surface and heatsink base before you install the HSF. We do that with silver-based thermal compounds, which we don’t trust to be electrically nonconductive, despite manufacturers’ claims to the contrary.

The next step is to orient the CPU cooler above the processor, as shown in Figure 5-16, keeping it as close to horizontal as possible. Slide the CPU cooler down into the retaining bracket, making sure that the lock tabs on each of the four corners of the CPU cooler assembly are aligned with the matching slots in the CPU cooler retaining bracket on the motherboard. Press down gently and use a small circular motion to spread the thermal goop evenly over the surface of the processor.

Figure 5-16: Align the CPU cooler over the processor, making sure the locking tabs on the CPU cooler align with the corresponding slots on the retaining bracket

Make sure that both of the white plastic cam levers (one is visible near Barbara’s thumb in Figure 5-16) are in the open position, not applying any pressure to the CPU cooler mechanism. With the CPU cooler aligned properly, press down firmly, as shown in Figure 5-17, until all four locking tabs snap into place in the corresponding slots on the retaining bracket. This step requires applying significant pressure evenly to the top of the CPU cooler mechanism. It’s generally easier to do that using your full hand rather than just your fingers or thumbs. With some CPU coolers, it may be easier to get two opposite corners snapped in first and then do the remaining corners.

Figure 5-17: With the CPU cooler aligned, press down firmly until it snaps into place

With the CPU cooler snapped into the retaining bracket, the next step is to clamp the heatsink tightly against the processor to ensure good thermal transfer between the CPU and heatsink. To do so, pivot the white plastic cam levers from their unlocked position to the locked position, as shown in Figure 5-18.

Figure 5-18: Clamp the CPU cooler into place

EASY DOES IT

The first lever is easy to lock into position, because there is not yet any pressure on the mechanism. With the first lever cammed into its locked position, though, locking the second lever requires significant pressure. So significant, in fact, that the first time we tried to lock the second lever, we actually popped it out of the bracket. If that happens to you, unlock the first camming lever and snap the second one back into position. You may need to squeeze the pivot point with one hand to keep that lever from popping out of place again while you lock the lever with the other hand.

The thermal mass of the heatsink draws heat away from the CPU, but the heat must be dissipated to prevent the CPU from eventually overheating as the heatsink warms up. To dispose of excess heat as it is transferred to the heatsink, most CPU coolers use a muffin fan to draw air continuously through the fins of the heatsink.

YOUR MILEAGE MAY VARY

Different CPU coolers use different retention mechanisms. The CPU coolers bundled with retail-boxed CPUs are designed to be secured using the standard socket or bracket arrangement for the socket type in question. Some third-party CPU coolers use custom mounting arrangements. If you are installing such a CPU cooler, follow the directions included with the CPU cooler.

Some CPU fans attach to a drive power connector, but most (including this Intel unit) attach to a dedicated CPU fan connector on the motherboard. Using a motherboard fan power connector allows the motherboard to control the CPU fan, reducing speed for quieter operation when the processor is running under light load and not generating much heat, and increasing fan speed when the processor is running under heavy load and generating more heat. The motherboard can also monitor fan speed, which allows it to send an alert to the user if the fan fails or begins running sporadically.

To connect the CPU fan, locate the 3-pin header connector on the motherboard labeled «CPU fan,» and plug the keyed cable from the CPU fan into that connector, as shown in Figure 5-19.

Figure 5-19: Connect the CPU fan cable to the CPU fan connector

Intel’s current Socket 775 (also called Socket T) processors require slightly different installation steps than processors that use Socket 462 (A), 478, 754, or 939. This section illustrates those differences.

The fundamental difference between Socket 775 and other current processor sockets is that Socket 775 places the pins in the socket and the matching holes on the processor body rather than the converse. That means the pins are vulnerable, so Socket 775 motherboards use a plastic shield to protect the socket until the processor is installed. To begin installing a Socket 775 processor, simply snap out the socket shield, shown in Figure 5-20.

Figure 5-20: The gray plastic Socket 775 socket shield

WASTE NOT, WANT NOT

Save the socket shield for future use, or install it on the old motherboard to protect its socket.

With the socket shield removed, the socket itself is visible, as shown in Figure 5-21. The metal bracket that surrounds the socket is the processor retaining bracket, which is locked in place by the hook-shaped lever visible to the left of the socket. Release that lever and swing it vertically to unlatch the processor retaining bracket.

Figure 5-21: The processor socket is visible after you remove the socket shield

With the lever unlatched, swing the processor retaining bracket upward to make the socket accessible, as shown in Figure 5-22.

Figure 5-22: Release the latching lever and swing the processor retaining bracket upward

Figure 5-23 shows the two keying mechanisms used by Socket 775. A triangle is visible at the lower-right corner of the processor, pointing to the one beveled corner of the socket. Also visible near the lower-left and -right corners of the processor are two keying notches, which mate with two protrusions in the socket body. Make sure that the processor is aligned properly with the socket, and then simply drop it into place.

Figure 5-23: Align the processor and drop it into the socket

After you drop the processor into the socket, lower the processor retaining bracket, as shown in Figure 5-24. The retaining bracket is secured by the cammed portion of the latching lever against the lip visible at the bottom of the bracket. Make sure that the latching lever is raised far enough for the cammed portion to clear the lip on the bracket, and use finger pressure to close the retaining bracket until it seats.

Figure 5-24: Verify that the latching lever clears the lip on the retaining bracket

With the bracket lip and latching lever aligned, press down firmly on the latching lever until it snaps into place under the latch, as shown in Figure 5-25. Use a paper towel or soft cloth to polish the top of the processor, as described in the previous section.

Figure 5-25: Clamp the latching lever into place, securing the processor in the socket

Magic Marker?

In case you’re wondering, the processor shown is a Pentium D 820 engineering sample, hand-labeled by Intel before they sent it to us.

Socket 775 uses a different mechanism to secure the CPU cooler. Rather than using a plastic bracket surrounding the socket, like Socket 478, Socket 775 uses four mounting holes arrayed at the corners of the socket. Figure 5-26 shows a typical Socket 775 CPU cooler, in this case a stock Intel unit. The white square visible at the center of the copper heatsink base is a phase-change thermal pad. If your heatsink has such a pad, you needn’t apply thermal compound. If your heatsink lacks a thermal pad, apply thermal compound to the top of the processor before proceeding.

Figure 5-26: A standard Socket 775 CPU cooler, with mounting posts visible at each corner

To mount the CPU cooler, align it so that each of its four posts matches one of the motherboard mounting holes. Those holes form a square, so you can align the CPU cooler in any of four positions. Locate the CPU fan power connector on the motherboard and orient the CPU cooler so that the fan power cable is located near the power connector. Make sure the four posts visible at each corner are aligned with the mounting holes, as shown in Figure 5-27, and then seat the CPU cooler.

Figure 5-27: Align the CPU cooler so that each mounting post enters one of the mounting holes

Strip Before Using

Some thermal pads that are pre-installed on CPU coolers include a paper or thin plastic protective sheet that must be removed before the CPU cooler is installed. Examine the thermal pad carefully and, if necessary, strip off the protective sheet before you install the CPU cooler.

The CPU cooler is now connected to the motherboard but not yet locked into place. Press down on the top of each of the mounting posts, as shown in Figure 5-28, to expand the tips of the mounting posts and secure the CPU cooler in position. (If you need to remove the CPU cooler later, simply lift up each of the four posts to unlock the connectors. The CPU cooler can then be lifted off without resistance.)

Connect the CPU fan cable to the CPU fan connector to complete the processor installation.

Figure 5-28: With the HSF aligned, press down firmly until it snaps into place

More about Computer Processors[/quote]

Xeon e5440 on socket 775 — Dudom

Flashing the modified BIOS

This stage scares many users, although there is nothing complicated about it.

In fairness, it is worth noting that some boards can work with Xeons without modifying the BIOS. However, in this case, some instructions (for example, SSE4.1) may not be supported, the temperature of the cores or other parameters may be incorrectly determined.

Firmware is done before Xeon installation, with normal processor.

The algorithm is as follows:

First, you need to make sure that the motherboard is compatible with Xeon processors.
We download the modified BIOS for our board from this site or from the link.
We find (for example, on the official website of the manufacturer) instructions for updating bios. As a rule, it is enough to write the downloaded file to a USB flash drive, go into the BIOS and start the update. It is worth noting that for many motherboards there is software that can update from under Windows. You can also find out about it on the official website.
After a successful operation, you can proceed to install a new processor.

As a rule, there are 3 folders in the archive with a modified BIOS: «ORIG», «771», «771SLIC». Orig — original, unmodified bios. 771 — BIOS with the addition of Xeon microcodes. 771 Slic — with Xeon microcodes and Windows activation mechanism.

BIOS firmware on the example of a Gigabyte board:

Installation in the motherboard on socket 775

0004 First, you need to find out what kind of processor you got.

Processor with cuts and soldered contacts. The most common and convenient option. It does not require any additional actions, it is installed like any other processor.

Mounted kerf processor

Without cuts, but with a sticker on the contacts. It was distributed at the beginning of the mass appearance of xeons on this socket.

Processor without cuts but with sticker

Properly installed close-up sticker

To install, you will have to carefully cut the keys from the motherboard. You can do this with an ordinary clerical knife, the functionality of the board will not suffer, native processors will work as before.

These keys need to be carefully cut off

Original server processor. The rarest option, there are no cuts or stickers. The most logical decision in this case is the purchase of this very sticker.

After a successful installation, the BIOS should correctly detect the new processor. It will not be superfluous to go into the settings and check their correctness. After loading windows, go to the task manager and check the number of cores. Sometimes, when switching to Zion from a dual-core processor, the number of cores may remain equal to two. Therefore, if you see 2 cores instead of 4, then you need to do the following:

Click Start — Run and enter «Msconfig»
Go to the «Download» tab, then to «Advanced Options»
Uncheck «Number of processors»
Rebooting

Now the system will see all 4 cores

That’s all, the installation was successful and you can proceed to testing.

Possible problems after installation

When booting, a message appears about the need to update the BIOS, or a message about an unsupported processor (unsupported cpu detected)

As a rule, if you press F1, the system boots successfully. The problem, most likely, is that the modified BIOS is not flashed. If the error appears even after a successful firmware, but everything else works fine, then you can get rid of it by disabling function Halt boot on error in bios.

Windows 8.1 or Windows 10 won’t install

Windows may complain about some missing processor functionality (eg CompareExchange128 ). The error appears when:

The modified BIOS is not flashed
An outdated BIOS version

is installed

To fix it, flash the latest up-to-date bios version with Xeon microcodes.

The system does not boot, gives an error like «unrecognized CPU error»

Make sure to flash the modified BIOS for your board
Completely reset bios settings
If all else fails, try flashing another BIOS version

Windows crashes on boot

Reset all BIOS settings or set them to default. Make sure the correct SATA operating mode (IDE or AHCI) is set. In rare cases, you may need to reinstall Windows.

The cooler is constantly spinning at maximum speed

This can be for several reasons:

Modified BIOS not flashed
Too aggressive cooling mode set in Bios settings
Your cooling system just can’t handle Xeon

After installing Xeon, when you turn on the computer, a black screen and nothing happens

First, make sure you are using a compatible motherboard and flashed a modified BIOS for it.

Second, check that the processor is correctly installed in the socket. Perhaps the plastic keys are not completely cut off and this interferes with contact. If possible, test the operation on another board.

Finally, make sure all other components are connected correctly. Check the functionality with the old processor to rule out other problems.

Share «Installing Xeon 771 in socket 775»

The LGA775 platform, which Intel released back in 2004, turned out to be quite successful and long-lived. This is mainly justified by the fact that the LGA775 socket is compatible with the LGA771 server socket, processors for which are now very affordable. Thanks to this, you can upgrade the processor on a system with LGA775 for just a couple of dollars.

Briefly about Xeon processors and Socket LGA775, LGA771

Socket LGA775 (also known as Socket T) is a socket for desktop processors that was introduced in 2004 and remained relevant for 5 years until it was replaced by more modern ones LGA 1156 and LGA 1366 sockets. During the existence of this socket, many processors were released for it in such lines as Celeron, Pentium 4, Pentium D, Core 2 Duo, Core 2 Extreme and Core 2 Quad. Also for the LGA775, a number of server processors were released, which received the designation Xeon.

One feature of the LGA775 socket is that it has a socket twin called LGA771 (or Socket J). The LGA771 socket appeared six months after the release of the LGA775 and is intended exclusively for Xeon server processors. The LGA771 is called the «twin» because it is fully compatible with the desktop LGA775. There are only two differences between these sockets:

the location of the keys on the case, which blocks the installation of the processor for LGA771 in the LGA775 socket;
the location of two pins that are «mixed» with each other;

Naturally, such minimal differences between the sockets did not go unnoticed by enthusiasts, and very quickly a way was found to install any processor for LGA771 in a motherboard with an LGA775 socket. All that is needed for such an installation is to manually make a selection in the processor’s textolite so that it can be installed in the socket, and install a special adapter on the processor that will swap the reversed contacts.

Xeon E5450 processor prepared for installation in a motherboard with an LGA775 socket.

The ability to install a large number of processors from the LGA771 server platform greatly increased the upgrade options for computers based on LGA775. Thanks to this, systems based on this socket remain relevant even now, 15 years after the release. The fact is that server processors were actively purchased for use in a professional and corporate environment. Over time, computers based on these processors were replaced with more modern ones, and the processors themselves ended up on the secondary market.

Now the supply and demand for LGA771 server processors is such that in Chinese online stores (for example, on AliExpress) they cost just a couple of dollars, and the most advanced models can be estimated at $10 or $15. Moreover, most of these processors are sold with a turnkey sample already made and with an adapter installed. This allows you to install such processors right out of the box, without modifying them yourself.

Xeon Processor and Board Compatibility with Socket LGA775 and LGA771

As for the compatibility of Xeon processors, which were originally released for motherboards with an LGA775 connector, everything is simple here. You can just go to the motherboard page on the motherboard manufacturer’s official website and see the list of supported chips. All models that are listed there will earn 100% on your board.

To find a list of processors that are officially supported by your motherboard, you only need to know the name of the motherboard. The name can be found in any program for viewing characteristics, for example, you can use the free CPU-Z program.

The name of the motherboard must be entered into the search engine and go to the official page of the board manufacturer.

After that, you need to go to the «Support — List of processors» section. Here you will find a list of all Xeon processors that are officially supported by the specified board.

On the other hand, determining the compatibility of a motherboard with an LGA775 socket and a processor for an LGA771 socket is no longer so easy. Since these processors are not officially supported, there will be no data about them on the manufacturer’s website. Here you will have to rely on information that has been collected empirically.

For example, you can determine processor support for the LGA771 socket using the following table, which indicates the motherboard chipset and the list of supported Xeon processors.

motherboard

Xeon processors supported by the
Xeon 3xxx	Intel 65nm
Yes	Yes	No	Yes	Yes	Possibly	All Xeon processors for socket LGA 771 are supported
Supports Xeon processors from the X33 series

In addition, you can navigate by desktop processors, which are listed in the official list of supported processors.

will also work

The following Xeon processors

All 45nm quad core Xeon

All 45nm quad core Xeon no more powerful than 65 W

All 65nm quad core Xeon

All 45nm dual core Xeon

All 65nm dual core Xeon

Also note that LGA775 motherboards may require a BIOS update to use processors designed for LGA771.

List of Xeon processors for Socket LGA775

The following is a list of Xeon processors that have been released for the LGA775 desktop socket. You can use these processors when upgrading a computer based on the LGA775 platform. The main thing is to make sure that the processor you choose is in the list of supported ones on the official website of your motherboard manufacturer.

Find on AliExpress	Clock frequency, GHz
Find	1.86
Find	2.13
Find	2. 40
Find	2.33
Find	2.66
Find	3.00
Find	3.16
Find	3. 00
Find	2.83
Find	2.13
Find	2.40
Find	2.66
Find	2. 50
Find	2.66
Find	2.66
Find	2.83
Find	3.00
Find	3. 16

List of Xeon processors for Socket LGA771

The following is a list of Xeon processors that were released for the LGA771 server socket. These processors can also work on LGA775 motherboards, but preliminary preparation is required (adapter and PCB board) and compatibility check according to the tables (above). In addition, these processors may require a BIOS update to function.

I wanted to upgrade my 13 year old desktop. Market research has shown that now the most productive platform for the invested ruble is LGA1151 or LGA1356. After the collapse of the cryptocurrency market, miners around the world began to dump motherboards on this socket. I calculated how much the BU components would cost and became sad. I decided to see how much the most sophisticated stone for my old man on LGA775 would cost. It turned out to be the Core 2 Quad Q9550 for $23. I was about to buy, but then a server Xeon E5440 for $17 on LGA771 popped up in the search. The seller swore that with the adapter, Xeon would run on the LGA775 without any problems. I started to google, it’s really possible, but not as easy as the seller described.

So I decided to take a chance. The Xeon E5440 consumes 10 watts less. There was also a Xeon E5450 variant, but it was dismissed because of the unjustifiably high price of $27. It’s easier to take Q9550 for $23 and do nothing. Most likely, the price of the E5450 soared due to high demand — everyone reads the same instructions for alteration, where only this processor is indicated, and they run to buy.

In order for the LGA771 Xeon to start on the LGA775, a number of manipulations must be done. First, install an adapter sticker on the processor (sold separately) and cut off the protrusions on the socket with a clerical knife. After all the modifications, the correct installation of Xeon is carried out by the corner mark on the processor and socket.

The second step is to load the Xeon microcodes into the motherboard BIOS. The easiest way to modify the board is on the AMI BIOS, which Asus loves very much. Gigiabyte has the most problematic motherboards at Award. They are freaking out, trying to cram the unshovable into 1024KB. The output is a BIOS with non-standard addresses for microcodes. More about it here. There are a lot of patched BIOSes on the network for different motherboards, but I decided to flash the microcodes myself. Download the latest bios. We launch MC Extractor, look at which microcodes we have installed and which ones are already rotten. LGA771 platform. Copy the file to the folder. We are looking for and downloading the program MMTOOL 3.26 , fresh versions do not work with ancient BIOS. Delete all old microcodes « Delete a Patch Data » and replace with new ones « Insert a Patch Data «. After each operation, do not forget to click » Apply «. Add microcode for Xeon E54xx and save « Save ROM «.

Flashing the BIOS and getting

Speed tests of all cores in WinRAR, memory overclocking field

Single-core/all-core speed test and comparison with 8-core AMD FX-9590

Xeon’s real system bus frequency is only 333MHz, effective 4 times higher than 1334. 74MHz. DDR2 memory runs at double: 333.69MHz x 2 = 667.38MHz. My Chinese DDR2-800 can do 800MHz. I had to forcibly raise the frequency to 444MHz. Surprisingly, the memory easily took 888MHz.

Stress test, after overclocking the memory, showed an increase in consumption by 10 watts. It is not economically profitable to overclock the processor in terms of frequency — consumption is growing faster than performance.

The average consumption of the system unit after all manipulations is 100.120 watts, peak 150 watts. At work, Intel Core i7-3820 — if you do not play, there is no difference in speed.

What processors are suitable for the LGA 775 socket

Any computer becomes obsolete sooner or later. But by updating individual components of the system, you can significantly extend the life cycle of any PC. In this article, we will talk about the LGA 775 socket and the processors that are suitable for it. Using this information, you can upgrade a computer based on a motherboard with this connector.

Any pekashnik sooner or later becomes ancient. But by updating its parts of the system, you can extend its lifespan, thereby playing, for example, modern toys. In this post, we will analyze processors for socket 775. Using this information, you can upgrade your computer based on a motherboard with this socket.

Contents

Socket LGA 775 in brief
Celeron processors on Socket LGA 775
Pentium processors on Socket LGA 775
Core 2 Duo processors on Socket LGA 775
Core 2 Extreme processors on Socket LGA 775
Core 2 Quad processors on Socket LGA 775
Xeon processors on Socket LGA 775
LGA 771 processors on LGA 775

Briefly about Socket LGA 775

Socket LGA 775 is a socket for installing Intel processors, which appeared back in 2004 and was relevant until the end of the decade (although for some it is still relevant today). Then it was replaced with more modern connectors. One of the important innovations of this connector was the transfer of pins from the processor to the motherboard. This reduced the risk of damage to the processor during its installation. In addition, the placement of the pins on the motherboard opens up more repair options in case the pins get damaged. This socket uses 4 holes to mount the cooler with a spacing of 72mm x 72mm, which is why the LGA 775 coolers are not compatible with newer Intel sockets which have a spacing of 75mm.

Procs with LGA 775 connector were produced for a very long time because of which the connector had compatibility problems. Initially released boards with chips 915 and below usually support only single-core hemp 4 or celerons. 945 chipsets are dual-core and even quad-core (after updating the BIOS of the board). So when choosing a processor for a given socket, check the list of supported ones first. And then the system may not start.

To find a list of processors supported by your motherboard, you need to know its exact name. To do this, you can read this article, but in short, use the free CPU-Z program. Run the CPU-Z program on your package and go to the «Mainboard» tab. The manufacturer of the motherboard and its name will be indicated there.

Then enter this information into any search engine and go to the official website of the board manufacturer.

This will take you to the page with your motherboard on the official website of its manufacturer. Here you need to find a list of supported processors. Usually this list is in the «Support» or «Support» section.

In this list you can find all the CPUs that can be installed on your motherboard. In this case, next to each of the processors, the BIOS version that is needed for its operation will be indicated. You can download the required update for Bios in the same place, in the «Support» section.

Next, we provide a list of all processors that were released for Socket LGA 775. This list can be used to find out what processors are available for this socket.

Celeron processors on Socket LGA 775

Processor name	Issue date	Number of cores	Base clock	Cache size
Intel® Celeron® 420	Q2’07	1	1.60 GHz	512KB L2
Intel® Celeron® 430	Q2’07	1	1.80 GHz	512KB L2
Intel® Celeron® 440	Q3’06	1	2.00 GHz	512KB L2
Intel® Celeron® 450	Q3’08	1	2.20 GHz	512KB L2
Intel® Celeron® D 325J	Q4’04	1	2.53 GHz	256KB L2
Intel® Celeron® D 326	Q2’04	1	2.53 GHz	256KB L2
Intel® Celeron® D 330J	Q4’04	1	2. 66 GHz	256KB L2
Intel® Celeron® D 331		1	2.66 GHz	256KB L2
Intel® Celeron® D 335J	Q4’04	1	2.80 GHz	256KB L2
Intel® Celeron® D 336		1	2.80 GHz	256KB L2
Intel® Celeron® D 340J	Q4’04	1	2.93 GHz	256KB L2
Intel® Celeron® D 341	Q2’04	1	2.93 GHz	256KB L2
Intel® Celeron® D 345J	Q4’04	1	3.06 GHz	256KB L2
Intel® Celeron® D 346		1	3.06 GHz	256KB L2
Intel® Celeron® D 347	Q4’06	1	3.06 GHz	512KB L2
Intel® Celeron® D 351	Q3’05	1	3. 20 GHz	256KB L2
Intel® Celeron® D 352	Q2’06	1	3.20 GHz	512KB L2
Intel® Celeron® D 355	Q4’05	1	3.33 GHz	256KB L2
Intel® Celeron® D 356	Q2’06	1	3.33 GHz	512KB L2
Intel® Celeron® D 360	Q4’06	1	3.46 GHz	512KB L2
Intel® Celeron® D 365	Q1’07	1	3.60 GHz	512KB L2
Intel® Celeron® E1200	Q1’08	2	1.60 GHz	512KB L2
Intel® Celeron® E1400	Q2’08	2	2.00 GHz	512KB L2
Intel® Celeron® E1500	Q3’06	2	2.20 GHz	512KB L2
Intel® Celeron® E1600	Q2’09	2	2. 40 GHz	512KB L2
Intel® Celeron® E3200	Q3’09	2	2.40 GHz	1MB L2
Intel® Celeron® E3300	Q3’09	2	2.50GHz	1MB L2
Intel® Celeron® E3400	Q1’10	2	2.60 GHz	1MB SmartCache
Intel® Celeron® E3500	Q3’10	2	2.70 GHz	1MB SmartCache

Pentium processors on Socket LGA 775

Processor name	Issue date	Number of cores	Base clock	Cache size
Intel® Pentium® 4 505		1	2.66 GHz	1MB L2
Intel® Pentium® 4 505/505J	Q1’05	1	2.66 GHz	1MB L2
Intel® Pentium® 4 506	Q2’05	1	2. 66 GHz	1MB L2
Intel® Pentium® 4 511		1	2.80 GHz	1MB L2
Intel® Pentium® 4 511	Q4’05	1	2.80 GHz	1MB L2
Intel® Pentium® 4 515/515J	Q3’05	1	2.93 GHz	1MB L2
Intel® Pentium® 4 516	Q4’05	1	2.93 GHz	1MB L2
Intel® Pentium® 4 517	Q3’05	1	2.93 GHz	1MB L2
Intel® Pentium® 4 519J		1	3.06 GHz	1MB L2
Intel® Pentium® 4 519K	Q4’04	1	3.06 GHz	1MB L2
Intel® Pentium® 4 520	Q2’04	1	2.80 GHz	1MB L2
Intel® Pentium® 4 520/520J		1	2. 80 GHz	1MB L2
Intel® Pentium® 4 520J	Q4’04	1	2.80 GHz	1MB L2
Intel® Pentium® 4 521	Q3’05	1	2.80 GHz	1MB L2
Intel® Pentium® 4 524	Q2’06	1	3.06 GHz	1MB L2
Intel® Pentium® 4 530/530J	Q2’04	1	3.00 GHz	1MB L2
Intel® Pentium® 4 530J	Q4’04	1	3.00 GHz	1MB L2
Intel® Pentium® 4 531	Q2’04	1	3.00 GHz	1MB L2
Intel® Pentium® 4 540/540J	Q2’04	1	3.20 GHz	1MB L2
Intel® Pentium® 4 540J	Q4’05	1	3.20 GHz	1MB L2
Intel® Pentium® 4 541	Q3’04	1	3. 20 GHz	1MB L2
Intel® Pentium® 4 550	Q2’04	1	3.40 GHz	1MB L2
Intel® Pentium® 4 550/550J		1	3.40 GHz	1MB L2
Intel® Pentium® 4 550J	Q4’04	1	3.40 GHz	1MB L2
Intel® Pentium® 4 551	Q2’05	1	3.40 GHz	1MB L2
Intel® Pentium® 4 560/560J		1	3.60 GHz	1MB L2
Intel® Pentium® 4 560J		1	3.60 GHz	1MB L2
Intel® Pentium® 4 561	Q3’05	1	3.60 GHz	1MB L2
Intel® Pentium® 4 570J	Q4’04	1	3.80 GHz	1MB L2
Intel® Pentium® 4 571	Q3’05	1	3. 80 GHz	1MB L2
Intel® Pentium® 4 620		1	2.80 GHz	2MB L2
Intel® Pentium® 4 630	Q4’05	1	3.00 GHz	2MB L2
Intel® Pentium® 4 631	Q1’06	1	3.00 GHz	2MB L2
Intel® Pentium® 4 640	Q1’05	1	3.20 GHz	2MB L2
Intel® Pentium® 4 641	Q1’06	1	3.20 GHz	2MB L2
Intel® Pentium® 4 650	Q1’05	1	3.40 GHz	2MB L2
Intel® Pentium® 4 651	Q2’06	1	3.40 GHz	2MB L2
Intel® Pentium® 4 660	Q1’05	1	3.60 GHz	2MB L2
Intel® Pentium® 4 661	Q1’06	1	3. 60 GHz	2MB L2
Intel® Pentium® 4 662	Q4’05	1	3.60 GHz	2MB L2
Intel® Pentium® 4 670	Q2’05	1	3.80 GHz	2MB L2
Intel® Pentium® 4 672	Q4’05	1	3.80 GHz	2MB L2
Intel® Pentium® 4		1	2.80 GHz	1MB L2
Intel® Pentium® D 805	Q1’05	2	2.66 GHz	2MB L2
Intel® Pentium® D 820	Q2’05	2	2.80 GHz	2MB L2
Intel® Pentium® D 830	Q2’05	2	3.00 GHz	2MB L2
Intel® Pentium® D 840	Q2’05	2	3.20 GHz	2MB L2
Intel® Pentium® D 915	Q3’06	2	2. 80 GHz	4MB L2
Intel® Pentium® D 920	Q1’06	2	2.80 GHz	4MB L2
Intel® Pentium® D 920	Q1’06	2	2.80 GHz	4MB
Intel® Pentium® D 925	Q3’06	2	3.00 GHz	4MB L2
Intel® Pentium® D 930	Q1’06	2	3.00 GHz	4MB L2
Intel® Pentium® D 935	Q1’07	2	3.20 GHz	4MB L2
Intel® Pentium® D 940	Q1’06	2	3.20 GHz	4MB L2
Intel® Pentium® D 945	Q3’06	2	3.40 GHz	4MB L2
Intel® Pentium® D 950	Q1’06	2	3.40 GHz	4MB L2
Intel® Pentium® D 960	Q2’06	2	3. 60 GHz	4MB L2
Intel® Pentium® E2140	Q2’07	2	1.60 GHz	1MB L2
Intel® Pentium® E2160	Q3’06	2	1.80 GHz	1MB L2
Intel® Pentium® E2180	Q3’07	2	2.00 GHz	1MB L2
Intel® Pentium® E2200	Q4’07	2	2.20 GHz	1MB L2
Intel® Pentium® E2220	Q1’08	2	2.40 GHz	1MB L2
Intel® Pentium® E5200	Q3’08	2	2.50GHz	2MB L2
Intel® Pentium® E5300	Q1’08	2	2.60 GHz	2MB L2
Intel® Pentium® E5400	Q1’09	2	2.70 GHz	2MB L2
Intel® Pentium® E5500	Q2’10	2	2. 80 GHz	2MB SmartCache
Intel® Pentium® E5700	Q3’10	2	3.00 GHz	2MB SmartCache
Intel® Pentium® E5800	Q4’10	2	3.20 GHz	2MB
Intel® Pentium® E6300	Q2’09	2	2.80 GHz	2MB L2
Intel® Pentium® E6500	Q1’08	2	2.93 GHz	2MB L2
Intel® Pentium® E6500K	Q3’09	2	2.93 GHz	2MB
Intel® Pentium® E6600	Q1’10	2	3.06 GHz	2MB SmartCache
Intel® Pentium® E6700	Q2’10	2	3.20 GHz	2MB SmartCache
Intel® Pentium® E6800	Q3’10	2	3.33 GHz	2MB SmartCache
Intel® Pentium® Extreme Edition 840	Q2’05	2	3. 20 GHz	2MB L2
Intel® Pentium® Extreme Edition 955	Q1’06	2	3.46 GHz	4MB L2
Intel® Pentium® Extreme Edition 965	Q1’06	2	3.73 GHz	4MB L2
Pentium® 4 Extreme Edition		1	3.40 GHz	2MB L3
Pentium® 4 Extreme Edition		1	3.46 GHz	2MB L2
Pentium® 4 Extreme Edition		1	3.73 GHz	2MB L2

Core 2 Duo processors for Socket LGA 775

Processor name	Issue date	Number of cores	Base clock	Cache size
Intel® Core™2 Duo E4300	Q3’06	2	1. 80 GHz	2MB L2
Intel® Core™2 Duo E4400	Q2’07	2	2.00 GHz	2MB L2
Intel® Core™2 Duo E4500	Q3’07	2	2.20 GHz	2MB L2
Intel® Core™2 Duo E4600	Q4’07	2	2.40 GHz	2MB L2
Intel® Core™2 Duo E4700	Q1’08	2	2.60 GHz	2MB L2
Intel® Core™2 Duo E6300	Q3’06	2	1.86 GHz	2MB L2
Intel® Core™2 Duo E6320	Q2’07	2	1.86 GHz	4MB L2
Intel® Core™2 Duo E6400	Q3’06	2	2.13 GHz	2MB L2
Intel® Core™2 Duo E6420	Q2’07	2	2.13 GHz	4MB L2
Intel® Core™2 Duo E6540	Q3’07	2	2. 33 GHz	4MB L2
Intel® Core™2 Duo E6550	Q3’07	2	2.33 GHz	4MB L2
Intel® Core™2 Duo E6600	Q3’06	2	2.40 GHz	4MB L2
Intel® Core™2 Duo E6700	Q3’06	2	2.66 GHz	4MB L2
Intel® Core™2 Duo E6750	Q3’07	2	2.66 GHz	4MB L2
Intel® Core™2 Duo E6850	Q3’07	2	3.00 GHz	4MB L2
Intel® Core™2 Duo E7200	Q2’08	2	2.53 GHz	3MB L2
Intel® Core™2 Duo E7300	Q3’08	2	2.66 GHz	3MB L2
Intel® Core™2 Duo E7400	Q1’08	2	2.80 GHz	3MB L2
Intel® Core™2 Duo E7500	Q1’09	2	2. 93 GHz	3MB L2
Intel® Core™2 Duo E7600	Q2’09	2	3.06 GHz	3MB L2
Intel® Core™2 Duo E8190	Q1’08	2	2.66 GHz	6MB L2
Intel® Core™2 Duo E8200	Q1’08	2	2.66 GHz	6MB L2
Intel® Core™2 Duo E8300	Q2’08	2	2.83 GHz	6MB L2
Intel® Core™2 Duo E8400	Q1’08	2	3.00 GHz	6MB L2
Intel® Core™2 Duo E8500	Q1’08	2	3.16 GHz	6MB L2
Intel® Core™2 Duo E8600	Q3’08	2	3.33 GHz	6MB L2

Core 2 Extreme processors on Socket LGA 775

Processor name8

Processor name	Issue date	Number of cores	Base clock	Cache size
Intel® Core™2 Extreme QX6700	Q4’06	4	2. 66 GHz	8MB L2
Intel® Core™2 Extreme QX6800	Q2’07	4	2.93 GHz	8 MB L2
Intel® Core™2 Extreme QX6850	Q3’07	4	3.00 GHz	8MB L2
Intel® Core™2 Extreme QX9650	Q4’07	4	3.00 GHz	12MB L2
Intel® Core™2 Extreme QX9770	Q1’08	4	3.20 GHz	12MB L2
Intel® Core™2 Extreme X6800	Q3’06	2	2.93 GHz	4MB L2	Issue date	Number of cores	Base clock	Cache size
Intel® Core™2 Quad Q6600	Q1’07	4	2.40 GHz	8MB L2
Intel® Core™2 Quad Q6700	Q3’07	4	2.66 GHz	8MB L2
Intel® Core™2 Quad Q8200	Q3’08	4	2. 33 GHz	4MB L2
Intel® Core™2 Quad Q8200S	Q1’09	4	2.33 GHz	4MB L2
Intel® Core™2 Quad Q8300	Q4’08	4	2.50 GHz	4MB L2
Intel® Core™2 Quad Q8400	Q2’09	4	2.66 GHz	4MB L2
Intel® Core™2 Quad Q8400S	Q2’09	4	2.66 GHz	4MB L2
Intel® Core™2 Quad Q9300	Q1’08	4	2.50GHz	6MB L2
Intel® Core™2 Quad Q9400	Q3’08	4	2.66 GHz	6MB L2
Intel® Core™2 Quad Q9400S	Q1’09	4	2.66 GHz	6MB L2
Intel® Core™2 Quad Q9450	Q1’08	4	2.66 GHz	12MB L2
Intel® Core™2 Quad Q9500		4	2. 83 GHz	6MB L2
Intel® Core™2 Quad Q9505	Q3’09	4	2.83 GHz	6MB L2
Intel® Core™2 Quad Q9505S	Q3’09	4	2.83 GHz	6MB L2
Intel® Core™2 Quad Q9550	Q1’08	4	2.83 GHz	12MB L2
Intel® Core™2 Quad Q9550S	Q1’09	4	2.83 GHz	12MB L2
Intel® Core™2 Quad Q9650	Q3’08	4	3.00 GHz	12MB L2

Xeon processors on Socket LGA 775

Processor name	Issue date	Number of cores	Base clock	Cache size
Intel® Xeon® 3040		2	1. 86 GHz	2MB L2
Intel® Xeon® 3050		2	2.13 GHz	2MB L2
Intel® Xeon® 3060		2	2.40 GHz	4MB L2
Intel® Xeon® 3065	Q4’07	2	2.33 GHz	4MB L2
Intel® Xeon® 3070		2	2.66 GHz	4MB L2
Intel® Xeon® E3110	Q1’08	2	3.00 GHz	6MB L2
Intel® Xeon® E3120	Q3’08	2	3.16 GHz	6MB L2
Intel® Xeon® L3110	Q1’09	2	3.00 GHz	6MB L2
Intel® Xeon® L3360	Q1’09	4	2.83 GHz	12 MB L2
Intel® Xeon® X3210	Q1’07	4	2.13 GHz	8MB L2
Intel® Xeon® X3220	Q1’07	4	2. 40 GHz	8MB L2
Intel® Xeon® X3230	Q3’07	4	2.66 GHz	8MB L2
Intel® Xeon® X3320	Q1’08	4	2.50GHz	6MB L2
Intel® Xeon® X3330	Q3’08	4	2.66 GHz	6MB L2
Intel® Xeon® X3350	Q1’08	4	2.66 GHz	12MB L2
Intel® Xeon® X3360	Q1’08	4	2.83 GHz	12MB L2
Intel® Xeon® X3370	Q3’08	4	3.00 GHz	12 MB L2
Intel® Xeon® X3380	Q1’09	4	3.16 GHz	12MB L2

LGA 771 processors on LGA 775

J), which was used by Intel in the server market. These two sockets are very similar, and it is often possible to install processors designed for LGA 771 into a motherboard with an LGA 775 socket.

But there are a few things to be aware of here. Firstly, LGA 771 and LGA 775 differ in keys on the case and the location of two contacts. This is not a very serious problem, since most of these processors are sold with an LGA 775 key already cut out and a special adapter that changes the location of the mixed up contacts. Secondly, for these server processors to work, the motherboard must support them. This is a more significant problem, since not all boards with the 775 socket support server processors for the 771 socket.

Socket 771 server processors are usually supported by the motherboard chipset.

motherboard chipset	Supported processors
motherboard chipset	Xeon 5xxx	Xeon 3xxx	Intel 45nm	Intel 65nm
P45, P43, P35, P31, P965 G45, G43, G41, G35, G33, G31 nForce 790i, 780i, 740i, 630i GeForce 9400, 9300	Yes	Yes	Yes	Yes
Q45, Q43, Q35, Q33 X48, X38	No	Yes	Yes	Yes
nForce 680i and 650i	Yes	Yes	Possibly	Yes
Vidia 680i, nVidia 650i, nVidia 780i, nVidia 790iP35, P45, G31, G41	Support for all Xeon processors for LGA 771
X38, X48	Support only X33 series Xeons

In addition, you can focus on the support of LGA 775 processors.