Cpu socket 479: Socket 479 — Wikiwand

What Is Socket 479?



Fact Checked

Alex Newth

The socket 479 is an Intel® central processing unit (CPU) integration socket that allows the motherboard and CPU to work hand-in-hand to perform functions. Most sockets have a number after them to signify how many pins are on the socket and CPU, which would lead many to believe that this socket and CPU both have 479 pins, but this CPU really has 478. It is named 479 to differentiate it from the socket 478, which is used for desktop computers; the 479 connector is used for mobile platforms. Socket 478 CPUs can fit into the 479 connector, but they will not electronically configure or work with this socket.

Socket 479 is a microprocessor socket, meaning it is made for CPUs that do not fit into desktops, namely mobile computers and laptops. Created in 2001, this socket has many different microprocessors made under its design. There are the Pentium 3-M®, mobile Celeron®, Coppermine-T® and Tualatin® CPUs all made for this socket.

There are 479 pinholes in the socket 479 connector. What is odd about this socket is that, normally, CPUs have the same amount of pins as the socket, but the CPUs that fit this socket have only 478 pins. This was done to differentiate the socket from the socket 478, which was made at the same time for desktop computers. Socket 478 CPUs can fit the 479 connector, but they will not work because the electronic and pin configuration is different. The amount of pins means many CPUs made after this socket can fit the 479 connector, but they also will not work.

To tell the difference between a socket 478 and socket 479 processor — because the CPUs looks relatively the same — looking at the pin configuration will be of assistance. Both CPUs have 478 pins, but the pin configuration is different in the bottom right corner. The 478 CPUs are missing two pin spaces directly next to each other, while the 479 CPUs are missing two pin spaces diagonal to each other. This pin configuration is one reason why 478 CPUs do not work with the 479 socket.

The minimum and maximum processing speed of the socket 479 presents a wider gap than most other sockets. The low processing value is at 700 megahertz (MHz), and it can go all the way up to 2,333 MHz. The higher value was not utilized well until 2006, late in the 479 socket’s career, just before it was phased out for more advanced sockets.


MI920 Mini-ITX Motherboard with Socket 479

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2808030 – Mini-ITX Motherboard with Socket 479 for Intel Pentium M / Celeron M series processors

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2808030 — Mini-ITX Motherboard with Socket 479 for Intel Pentium M / Celeron M series processors

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MI920 Mini-ITX Motherboard with Socket 479 quantity


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2808030 – Mini-ITX Motherboard with Socket 479 for Intel Pentium M / Celeron M series processors

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2808030 — Mini-ITX Motherboard with Socket 479 for Intel Pentium M / Celeron M series processors

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the battle for Socket 478/479 and conquering the heights of 3DMark 2003

Table of contents

  • Introduction
  • A bit of history
  • Battle for Socket 478/479
  • What the Radeon 9800 is capable of or conquering the heights of 3DMark 2003
  • Conclusion


Not so long ago I decided to remember the old days when overclocking was a popular activity, when Athlon processors on Socket A (462) were not overclocked only by the lazy . .. Well, many years later, retroclockers set new records on old systems, waging battle for every megahertz. More about this in my review on the Personal Pages «Modern Socket-A Wars».

And in this article we will return to the end of 2001, when the first processors based on Socket 478 were announced, we will briefly talk about the evolution of socket 478 and dwell on modern overclocking of Pentium 4 family models. I think, for those overclockers who did not catch those times , this material will be interesting, and experienced enthusiasts will wipe away a mean tear, remembering Northwood and Prescott.

Probably, those readers who closely follow the world of extreme overclocking have already guessed that we will talk about one of the stages of the Old School is Best School retro championship. I took part in it.


A bit of history

If you remember the history, Socket 478 was a logical continuation of Socket 423, on which the first Pentium 4 appeared, which was fundamentally different from the previous Pentium III on Socket 370. Pentium 4 processors introduced a new microarchitecture, whose name – NetBurst.

This architecture was characterized by high clock speeds and hyperpipelining. The Pentium III froze at 1.4 GHz, the very first Pentium 4 models based on the Willamette core started at 1.3 GHz and stopped at 3.4 GHz on the Northwood and Prescott cores (known as a «stove» in the overclocking environment), and all this thanks to the NetBurst microarchitecture .

But what did hyper-threading bring to the Pentium 4? To put it simply, «thoughtfulness». It was all about the length of the unpredicted transition pipeline, which was noticeably longer than the Pentium III.

Pentium III models had a pipeline length of 10 stages, Pentium M (Socket 479) models had 12 stages, and Pentium 4 generations had 20 to 30 stages. In short, the shorter the pipeline, the faster the processor gets the result of the calculation, so the overclocked older versions of the Pentium III overtook the first Pentium 4 models.

But progress did not stand still, and after the Pentium 4 based on the Willamette core, Intel introduced the new Northwood core, which enthusiasts liked so much later. Processors based on this core were produced from 2002 to 2004 and overclocked perfectly on FSB. In addition, they were fast and moderately cold.

In 2004 they were replaced by Pentium 4 based on the new Prescott core. Processors of the Prescott family were distinguished by a significantly increased heat dissipation, for which they were called «stoves», and an increased conveyor length. The positive side of the new core was the presence of new SSE3 instructions, a thinner manufacturing process and twice the size of the second level cache. In those days, there were ongoing discussions on the forums, which is better — Northwood or Prescott?

To refresh my memory, I would recommend reading an article on the subject: «Northwood (2.8C) vs. Prescott». If you’re not curious enough to click the link, here’s a short recap: Northwood won where no SSE3 instructions were used, was cooler and faster with a shorter pipeline, but lagged behind in terms of frequency potential in terms of overclocking.

In addition to Pentium 4 based on Willamette, Northwood and Prescott cores, for the first time Intel has introduced a special cast of Extreme Edition processors with a price tag of $999. These CPU models contained another core — Gallatin, which belongs to the server segment, but for wealthy enthusiasts who are ready to part with the above amount, Intel did not spare either a free multiplier or 2 MB of L2 cache. Two versions of the Pentium 4 Extreme Edition were released on Socket 478 — 3.2 GHz and 3.4 GHz. However, the Gallatin core was an improved version of Northwood used in Intel Xeon server solutions.

Let’s take a look at Socket 479or mPGA479M. This connector is designed for mobile processors from Intel. Although Socket 479 does indeed have 479 pins, processors designed for it use only 478.

Many people confuse it with Socket M, which physically resembles Socket 479 in the same number of pins, but they are not electrically compatible.

Socket 479 includes processors based on Banias and Dothan cores. The architecture of these cores is closer to the Pentium III than to the Pentium 4. Dothan-based processors received a short pipeline, high performance per clock, minimal power consumption, a lot of architectural improvements aimed at increasing performance and a large amount of L3 cache (2 MB) . Such CPUs often brought any Pentium 4 to its knees. The older Dothan model with the Intel Pentium M 780 index worked at a frequency of 2267 MHz, while the thermal package was only 27 watts. For comparison, the top Pentium 4 Northwood and Prescott models were limited to TDP 89Tue

But back to Socket 479. Despite the fact that it belonged to the mobile segment, a number of motherboard manufacturers (such as AOpen and DFI) introduced desktop versions of motherboards with socket 479. And ASUS, being a leading manufacturer of computer components, decided distinguished itself and introduced the ASUS CT-479 processor adapter, which allowed installing Intel Pentium M processors in a number of Socket 478 motherboards of its own production.

Battle for Socket 478/479

Now let’s talk about the battle for the title of Socket 478/479 leader. For the second year in a row, the leading overclocking portal HWBOT.org has been organizing a retro competition called Old School is Best School. The main idea of ​​such competitions is to remember the basics and subtleties of overclocking computer components that have long been discontinued. The organizers come up with new tasks every time, and enthusiasts from all over the world compete with each other for the title of the best retroclocker.

These competitions do not require large financial costs and anyone can take part in them, just register on the HWBOT.org website and start completing tasks. All competitions are held on a special OC-Esports site, where all results are collected and points are awarded. Each Old School is Best School championship consists of five stages, which in turn are dedicated to a particular processor socket and include several tasks.

Not so long ago, the fourth stage of the second season of the Old School is Best School championship, which was entirely devoted to Socket 478/479, ended, as well as video cards of the ATI Radeon 9000 line. The tasks were as follows: calculating the number of pi in the SuperPI 1M test using any of the platforms to choose from (Socket 478 or Socket 479), and obtaining the best result in the 3DMark 2003 test package on the same platform with ATI Radeon 9000.

As a rule, after the start of the competition there is a buildup, someone is already making the first overclocking attempts, someone is looking for the right hardware at flea markets. There is also a third party that always watches what is happening and at the very end, a couple of minutes before the end of the competition, lays out its result. We will skip these, in my opinion, not the most interesting category of overclockers, but we can stop at the first two.

The entire championship is similar to a game of poker, since each player has several worked out results, but is laid out at the beginning, as a rule, the most modest with the minimum number of points. At the sight of such indicators, opponents post a slightly better result, and it turns out to be a kind of race until one of the participants stops due to the exhaustion of the processor resource, or the need to change the cooling system. An important role in achieving the first positions is played by tuning the operating system, setting up drivers, memory timings and other tricks. Often what you see in a screenshot of a competitor can give you food for further thought on how to competently prepare a test bench for a new stage of the race, all this is vaguely reminiscent of Formula 1.

But this time this chronology of events was violated by the Ukrainian team Overclockers.UA represented by RomanLV , who on the third day of the competition immediately took and posted a very serious result in the Super Pi 1M test — 26 sec 391 msec. When using air cooling, the overclocker overclocked his Pentium M 740 on the Dothan core to 2753 MHz, or 58.9%. Naturally, this became possible thanks to the ASUS CT-479 adapter and the ASUS P4P800 SE motherboard. Finding such an adapter is not an easy task, and not every team will be able to purchase and test it in action in a period of one month. Well, a kind of countdown was set.

And the day before this event, the Czech HardOCzech Team, represented by an enthusiast under the nickname havli , gets a result of 29 sec 439 msec using a Pentium M 770 running at 2615 MHz. Overclocking, carried out with the help of air cooling, amounted to 22.6%. The motherboard was ASUS P4P800 Deluxe.

Greek overclocker Stelaras from the HwBox Hellas O/C Team achieved 26 sec 478 ms by overclocking a Pentium M 760 to 2700 MHz in air.