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Review of video card ASUS GeForce 8800GT 256Mb GECID.
com. Page 1
::>Video cards
>2008
> ASUS EN8800GT/HTDP/256M
15-02-2008
Page 1
Page 2
One page
Already at the time of the announcement of the NVIDIA G9 GPU2, which became D8P according to the new naming system, there was information about the release of at least two variants of video cards on it. Moreover, the cheaper version of video cards based on the GeForce 8800 GT had to have not only reduced video memory to 256 MB, but also be equipped with slower memory chips.
|
GeForce 8800 GT 512 MB |
GeForce 8800 GT 256 MB |
|
| nine0002 Core frequency, MHz |
600 |
|
|
Frequency of universal processors, MHz |
1500 |
|
|
Number of universal processors |
112 |
|
|
Number of texture / blending units |
56 / 16 |
|
| nine0002 Memory size, MB |
512 |
256 |
|
Effective memory frequency, MHz |
1800 (2*900) |
1400 (2*700) |
|
Memory type |
GDDR3 |
|
|
Memory bus width, bits |
nine0002 256 | |
|
Power consumption, W |
to 110 |
|
|
List price, $ |
249 |
199 |
But, probably, to the delight of buyers, most manufacturers, when introducing GeForce 8800 GT 256 MB video cards, contrary to the recommendations, did not slow down the video memory, which would at least somehow compensate for the decrease in its volume.
Among such manufacturers is ASUS, whose EN8800GT/HTDP/256M video card we will consider in this review, at the same time determining the prospects for the GeForce 8800 GT with 256 MB of video memory. nine0003
First, let’s give a brief description of the video card:
|
Model |
ASUS EN8800GT/HTDP/256M |
|
Graphics core |
NVIDIA GeForce 8800 GT (G92-270) |
|
Conveyors |
112 unified |
|
Supported APIs |
DirectX 10.0 |
|
Core frequency, MHz |
600 |
|
Size (type) of memory, MB |
256 (GDDR3) |
|
Real (effective) memory frequency, MHz |
900 (1800 DDR) |
|
Memory bus |
256 bit |
|
Tire standard |
PCI Express 2. |
|
Maximum resolution |
Up to 2560 x 1600 |
|
Outputs |
2x DVI-I (VGA via adapter only) |
|
nine0002 HDCP support HD video decoding |
Yes |
|
Drivers |
Fresh drivers can be downloaded from: |
|
Manufacturer website |
http://www.asus.com.tw/ |
|
Average price |
View in price.ua. |
0 X16 The video card comes in a large box, but not like the top products, which immediately hints at the class of the accelerator and its positioning in the middle sector.
On the packaging, in addition to mentioning the necessary features of the accelerator, such as the name, the amount of memory and the bus used, the attention is focused on the installation of an alternative Glaciator cooling system, which should provide improved cooling for the GPU. nine0003
The reverse side of the package contains a little more information about the capabilities of the video card, but mostly it lists the capabilities of the G92 chip and advertises ASUS proprietary technologies and utilities, such as Splendid, Video Security, GamerOSD and SmartDoctor.
Of the useful technical data on the packaging, we can only note the indication of the minimum system requirements for the computer in which the buyer is going to install ASUS EN8800GT/HTDP/256M/A. It is desirable to have at least 512 MB of RAM or more, as well as a 400 W power supply capable of delivering 26 A through the 12V line.
Video card package includes only the bare essentials:
- Adapter from Molex peripheral connectors to 6-pin video card power connector;
- VGA to DVI adapter;
- Component HDTV-Out;
- Video Quick Install User’s Guide;
- 2 CD with drivers, utilities and multilingual electronic manual.
The ASUS EN8800GT/HTDP/256M/A video card has the same dimensions (9″ in length), like the 512 MB version, but differs not only in the use of a new cooler, but also in the use of a different version of the printed circuit board, which becomes immediately apparent, even without the need to remove the cooling system. PCB and has a «second generation» G2 wiring, which involves the use of fewer layers of PCB, which should make the entire video card cheaper. Due to the «lightening» of the printed circuit board, some nodes have changed or changed their location, but, in general, the functionality has remained the same It can be considered a feature, except that the power stabilizer, which uses all 4 channels (3 for GPU power and 1 for video memory power and strapping), i.e. the power supply of the graphics chip should be more stable (perhaps this will increase overclocking potential of the video card). and taking temperature readings from the graphics processor, which requires the use of only the proprietary SmartDoctor utility for monitoring.
In addition, only constant power is supplied to the cooler, which makes it impossible to regulate its rotation speed. For the same reason, fan operation is not monitored. nine0003
|
For comparison, here are photos of the first generation GeForce 8800 GT PCB: |
She needs to be fed more. nine0003
The set of interface connectors includes two DVI, converted to VGA using adapters, and one HDTV-Out.
The «highlight» of the video card is the two-slot Glaciator cooling system, which solves two problems at once. Firstly, the use of such a cooler allows you to better cool the graphics processor and the entire board, a special casing reduces the dispersion of air flow, directing it to the memory chips. Secondly, the noise from the cooling system is reduced, which is especially important in the absence of a fan speed control mechanism (as we remember, the stock cooler was quite noisy at maximum speed).
Still, the operation of the Glaciator can be heard, but only if all other PC components are completely silent — in most cases, the video card will not stand out against the background of the PSU and auxiliary fans. nine0003
Despite the brass color of the main heatsink and auxiliary power supply module, they are made of aluminum. At the same time, the cooling class really corresponds to the declared one — we managed to warm up the graphics processor to 70°C, which is 8°C less than the «standard» cooler showed under the same conditions on the reference version with 512 MB of video memory.
Graphics core G92-270 (NVIDIA GeForce 8800 GT 256-bit), operates at 600/1500 MHz for the raster and shader units, respectively. Data exchange with video memory occurs via a 256-bit bus. nine0003
The 256 MB video memory is equipped with eight Hynix HY5RS573225B FP-11 GDDR3 chips, which are designed to work with an effective DDR frequency of 1800 MHz, at which they operate, which does not differ from the 512 MB version.
Thus, games and modes that do not use very much video memory should not experience any performance drop.
Gigabyte 8800GT — ready to take off! / Video cards
We are somehow used to the fact that a new generation flagship is released first, and only then middle-class chips with a new architecture are released, the performance of which is at the level of the «top» cards of the previous generation. This time, NVIDIA has changed the usual order. New generation video processor codenamed G92, which forms the basis of 8800GT-type video cards, the company itself formally classifies as middle-class solutions. However, now NVIDIA can afford not to hurry with the new flagship. Moreover, the new “middle peasant” already turned out to be surprisingly nimble.
An engineering sample of the Gigabyte 8800GT video card, which was in our laboratory, was presented without packaging and accessories, with somewhat overestimated operating frequencies compared to the recommended ones.
No wonder, this is a test sample, and buyers will see the product in all its glory. To give you an idea of what to look for on store shelves tomorrow, here is a photo of the packaging, courtesy of Gigabyte.
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As you can see from the inscriptions on the front side of the package, the GPU core contains 112 stream pipelines, 512 MB of video memory is installed on the video card, and the PCI-Express version 2.0 interface is mentioned. Let’s say right away that PCI-E 1.0 and 2.0 interfaces are backward compatible with each other. That is, a video card with a PCI-E 2.0 interface will work without problems in «old» motherboards with a PCI-E 1.0 interface. The main theme of the packaging of the Gigabyte 8800GT video card is inspired by the game Neverwinter Nights 2, which is bundled with this card. In addition to the game, the video card package should also include DVI / D-Sub, HDTV-out adapters, an additional power adapter, a user manual and a driver disk.
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This is a photo of a test sample made in our laboratory. As you can see, the Gigabyte 8800GT video card looks exactly the same as in the previous photo, except that the color of the bar with connectors has turned black instead of white. The card really occupies one slot and has a very compact cooling system. It is clear that the first samples of 8800GT video cards will copy NVIDIA’s reference design. Gigabyte understands this very well, and decided not to waste energy on the colorful design of the card’s heatsink cover, but managed with a simple and strict sticker on the cooler.
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As you can see, the heatsink covers the entire surface of the PCB. What is hidden under it, we will soon find out.
The reverse side contains a scattering of small elements. Affects a large number of mounting screws. Apparently, such a number of them is necessary for a tight pressure of the heatsink not only to the video processor, but also to the video memory chips, as well as power elements.
If you remove the cooler, you can see that eight memory chips are located in a semicircle around the GPU, and a good third of the printed circuit board is occupied by the power subsystem. There is also an additional power connector, previously hidden by the radiator cap. Speaking of power, Gigabyte engineers recommend using a power supply unit with a power of 400 W or more, capable of delivering a current of at least 26A through the 12 V line. By modern standards, the requirements are not too high, which will please the economical upgrade lovers.
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As it turned out, the cover of the cooler is not plastic, but metal. It took a lot of effort to take it off. If you decide to repeat such an experiment, we recommend that you first completely remove the cooler from the video card, and only then try to remove the cover. The cover tightly holds the base of the radiator thanks to several protrusions located on it.
And the possible rattling of the cover is designed to eliminate the Velcro, which additionally secures the cover to the radiator. The impeller of the cooler is quite large. When the system starts up, the sound of the video card cooler is clearly audible, so operating it at maximum speed is unlikely to be comfortable, but in normal mode, the cooler noise is almost inaudible, including under load. The heatsink itself is an aluminum base with a copper insert for the GPU. There are as many as three heat pipes attached to this insert, and in turn, cooling fins are located on the pipes. In general, the system is quite compact and efficient. The only drawback that can be noted with this reference cooler is the direction of hot air exhaust towards the video card connectors. However, this is due to the single-slot design of the cooler. Of course, if the design of the cooler were two-slot, the hot air would be removed outside the system unit.
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From the side adjacent to the video card, the cooler does not look so impressive, but there is something interesting here.
We deliberately did not remove thermal pads, which provide thermal contact between memory chips and power elements with a heatsink. As you can see, the engineers took care of cooling all the key elements. The copper insert for cooling the GPU is much larger than its core, however, for some reason, the thermal interface is applied almost over the entire surface of the insert. One gets the feeling that the video processor crystal should be covered with a heat-distributor cover. However, it is not. Look.
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Despite the functionality close to the G80, the new G92 video chip turned out to be quite compact, and all thanks to the thin 65-nm process technology. As a result, heat dissipation decreased, and the frequency potential of the chip increased greatly. Why are we talking about this so confidently? Very simple. On the sample we had in the lab, the GPU clock speed was 750 MHz (!) in normal mode, while the recommended video processor frequency was 600 MHz.
This is 25% higher than «should be». As for the frequency of the shader unit, instead of the nominal 1500 MHz, they worked at a frequency of 1800 MHz! Compare this to the 8800GTX shader clock of 1350 MHz.
We’re not going to claim that all 8800GT video cards from Gigabyte will operate at exactly these frequencies, but we still express our gratitude to the company’s engineers. Due to such frequencies of the test sample, we will already be able to estimate the overclocking potential of «regular» 8800GT and find out very interesting details in the «behavior» of these cards during overclocking.
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As mentioned above, the total amount of video memory on the 8800GT card from Gigabyte is 512 MB and is made up of eight GDDR3 chips manufactured by Qimonda. The access time is 1 ns, which corresponds to the nominal frequency of 2000 MHz DDR. The nominal frequency of the video memory is slightly less — 1800 MHz DDR, and completely coincides with the recommended one.
The width of the video memory bus is 256 bits.
Well, now the fun part — the tests!
Acceleration
This time we decided to do without overclocking. The video card Gigabyte 8800GT is already significantly overclocked without it, and the usual utilities don’t understand this card yet. But, as it turned out, «unusual» utilities understand it perfectly. This refers to the nTune utility, which recognized the video card and calmly allowed you to change the frequencies of the video processor and memory. As it turned out, with its help you can control the speed of rotation of the cooler and take temperature readings. Despite these possibilities, we still did not overclock the card. Of course, it would be possible to overclock the video memory up to the nominal frequency of 2000 MHz DDR, but even without this it is quite possible to qualitatively evaluate the important points in the behavior of the video card.
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Tested with ForceWare 163.
71 and Catalyst 7.10 drivers
Unfortunately, there was not much time for tests, so we cannot provide an exhaustive picture, but we hope that the test results in such a modest version will be of interest to you. As rivals for Gigabyte 8800GT, we decided to take GeForce 8800GTX and Radeon HD2900XT at nominal frequencies. Unfortunately, we didn’t have the 8800GTS video card at hand, which would be more logical to compare the new product with. However, if we remember that the 8800GTS and HD29 cards00XT show pretty close results, the absence of 8800GTS doesn’t look fatal. Besides, this test of 8800GT is just the beginning of a series of tests of this video card, and we will be testing it again and again with different rivals and under different conditions.
In the diagrams, the results of 8800GTX are highlighted in dark green, HD2900XT are in red, and the results of the novelty are in bright green.
Synthetic 3DMark tests show a tangible superiority of the overclocked 8800GT over both rivals.
Apparently, this is due to the high clock speeds of new items. In the «default» mode, 3DMark tests do not use full-screen anti-aliasing and texture filtering, so the 8800GT’s narrower memory bus hardly affects the results.
We carried out further tests in the mode with full-screen anti-aliasing and anisotropic texture filtering (4AA/16AF).
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In the game Oblivion, the novelty also feels quite comfortable, even at high resolutions, and is on par with the 8800GTX.
In Need for Speed Carbon, the advantage of Gigabyte 8800GT over 8800GTX becomes even more noticeable. Most likely, this is due to the incredibly high frequencies of the 8800GT and its shader unit, which is heavily loaded in this game.
But in the game Serious Sam II, the picture is somewhat different. If at low resolutions both representatives based on NVIDIA chips are on a par, then as the resolution increases, the new product is slightly, but still inferior to 8800GTX.
Affects the lack of video memory bandwidth?
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Yes, apparently it is. In Quake 4, which is very sensitive to video memory bandwidth, the gap between 8800GTX and 8800GT widens, and not in favor of the latter.
A similar picture is in the game Prey. Although the new product outperforms 8800GTX at 1024×768, a further increase in resolution reverses the advantage.
And finally F.E.A.R. This game is still one of the most demanding both in terms of shader efficiency and video memory bandwidth. As you can see, here the new 8800GT fails to outperform 8800GTX in any resolution. On the other hand, if we take into account the 1.5-fold difference in the memory bus width, the lag of 8800GT does not look so significant, only ten percent.
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Preliminary results
Of course, the given set of tests is small and already obsolete.
We’ll fix this shortcoming soon, but for now we can conclude that the 8800GT video card performs well in older games. And even the 256-bit wide memory bus doesn’t limit it much compared to such monsters as 8800GTX and HD2900XT. On the other hand, there should be a difference in performance due to the width of the memory bus, especially in heavy graphics modes. Can we see her? Let’s try.
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Influence of memory bus width
In the following tests, we will study how the performance of the 8800GT video card behaves if we change only one of the frequencies — the video processor or the memory. We carried out similar tests in the following materials:
- Relevance of 512-bit video memory bus for modern GPUs
- Is a 256-bit memory bus really necessary in middle-end video cards? Theory and practice.
Therefore, we will not dwell on the methodology in detail, but immediately present the first graph in which, at a constant GPU frequency, the video memory frequency changes.
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As you can see, both video cards are quite sensitive to video memory bandwidth and show a good increase in results with increasing video memory frequency. On the one hand, this indicates that the bandwidth of the video memory is not enough, on the other hand, the power of the GPU is such that it does not limit the results. Otherwise, the lines on the right side of the graph would become parallel to the OX axis. The fact that we see a horizontal «shelf» for the topmost line on the graph is due to the insufficient performance of the CPU, which starts to limit the results at around 165 FPS, and not at all to the limitation of the GPU on the 8800GTX video card.
Interestingly, in the non-AA/AF mode, the 8800GTX demonstrates much better results than the 8800GT. Apparently, this is due to the difference in the width of the memory bus. But we don’t buy top-end graphics cards to play in easy modes. See how things change when full-screen anti-aliasing is turned on.
The gap between 8800GT and 8800GTX is significantly reduced and becomes almost constant, regardless of the video memory frequency. Or, if we compare the results of the 8800GT video card for different modes, it turns out that the drop in performance when full-screen anti-aliasing is enabled is less than that of the 8800GTX. A paradoxical conclusion suggests itself — the 8800GT video card should be used in heavy graphics modes! Even though it won’t overtake 8800GTX in the overall standings (the flagship isn’t ranked anyway), but it won’t lag far behind, despite the 1.5 times smaller memory bus.
As for overclocking, in the case of the 8800GT it’s obvious that if you want maximum results and there is an opportunity to overclock the video memory, you need to overclock the video memory. The increase in results will be almost linear.
Okay. And what will happen if you fix the frequency of the video memory and change the frequency of the video processor? Let’s look at the second graph.
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This graph shows the result lines for the 8800GT only, as before, for two graphics modes — no AA/AF and 4AA/AF. The most interesting behavior is the bottom line. At first, as the GPU frequency increases, the overall performance of the video card grows linearly and at a very decent pace. But at the point corresponding to the GPU frequency of 600 MHz, we observe an inflection. That is, a further increase in the frequency of the GPU gives a not so high performance increase. Perhaps this behavior is due to the fact that the GPU’s power increases so much that it stops loading completely, and some of its blocks start to idle (remember the «narrow» memory bus). It turns out that on the 8800GT video card it is more profitable to overclock the video memory, rather than the GPU, if for some reason it is not possible to do both at the same time. Those who wish can easily independently estimate the FPS increase depending on the frequency increase in both cases.
What is surprising is that the inflection point is exactly at the GPU frequency of 600 MHz. Recall that this frequency is recommended for 8800GT-class products. Strange, right? It turns out that it makes no sense to set the GPU frequency below 600 MHz for the 8800GT card — the GPU’s potential will simply not be fully used. On the other hand, setting the frequency much higher also does not make much sense, the performance gain will not be so impressive. I wonder if NVIDIA engineers also conducted similar tests, or is it just a coincidence?
And the practical conclusion from these two graphs will be this — if you decide to become a happy owner of a video card like 8800GT and are thinking which one to choose, we would advise you to pay more attention to the frequency of the video memory, rather than the GPU. If you do not plan to overclock your video card, this is also a perfectly reasonable approach. It will provide quite comfortable performance even at the recommended frequencies.
Apparently, the recommended frequencies are the most optimal in terms of performance / reliability.
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Terminals
The GeForce 8800GT video card is an impressive product, both in terms of its features and the recommended price. If you don’t know yet, we would like to inform you that 8800GT video cards are positioned as middle-end products! That is, the recommended price should be at the level of $199-$249, depending on the amount of installed video memory (lower price corresponds to versions of video cards with 256 MB memory). Well, you just saw how these new «middle peasants» feel in competition with today’s top products.
If NVIDIA presented us with a very productive «middle peasant» with a very attractive recommended price, then Gigabyte’s engineers demonstrated what can be squeezed out of this middle peasant. It is clear that the thin technical process and relatively low power consumption of the new chip leaves a good margin for overclocking.