Factory Overclocked: GeForce 7900 GT
In looking around the internet for prices on these cards, we noted that there are quite a number of overclocked NVIDIA cards available. Some come with a hefty price premium and some are sold at about the same price as their stock counter parts. While we'd like to just look at value with stock clock speeds, the market is just not that simple. In order to better understand the impact of these factory overclocked products without benchmarking every single clock speed combination on the market, we decided to pick a few key speeds and games and run some tests. We will use this information to determine whether the overclocked products are worth more than their stock counterparts, and whether looking at overclocked cards changes our recommendation for what to buy.
We chose to run our overclocked part at our sweet spot resolutions in order to see how each game would be affected. Note that we are only looking at factory overclocked options, which is why we are not including ATI overclocking. These are manufacturer warranted clock speeds, so they are guaranteed.
We've seen everything from 500MHz up to 600MHz being advertised, but the most common core clock speeds (increased from the stock 450MHz) seem to be between 500MHz and 580MHz. For these tests, we chose to run a 580/790 (core/mem) overclock in order to see what the higest performing overclocked 7900 GT parts are capable of doing. Stock memory speeds come in at 660, so a 130MHz memory overclock and a 130MHz core overclock beyond stock are both very significant. The 580/790 clock speeds are chosen based on the EVGA e-GeForce 7900 GT KO SuperClocked card. This is the product listed in our Contenders page available from newegg for $290, which is quite a deal.
The EVGA 7900 GT KO SuperClocked does very well in BF2, improving significantly over the stock 7900 GT to best the X1900 XT and lead the pack at this resolution.
The overclocked 7900 GT is able to just edge out the X1900 XT in Black & White 2.
Under F.E.A.R., the 7900 GT can't best the X1900 XT even with a 130MHz core overclock.
While the overclock gives the 7900 GT a major boost over stock, it merely hangs with the X1900 XT under HL2:Ep1.
ATI remains solidly in the lead under Oblivion, though the overclocked 7900 GT does manage to surpass the stock X1900 GT.
With the added power, the EVGA KO SuperClocked is able to take the performance lead back, not only from the X1900 GT, but from the X1900 XT as well.
Rise of Nations: Rise of Legends falls in favor of ATI's X1900 XT.
Moving up from equivalent performance with the X1900 GT, the overclocked 7900 GT is still unable to attain X1900 XT levels of performance under SC:CT.
The significant lead the X1900 GT has over the stock 7900 GT is eroded when we look at our overclocked card.
While not enough to best the X1900 XT, all of our overclocking tests have shown the overclocked 7900 GT to outperform the X1900 GT, even in cases where the stock 7900 GT lagged behind.
From the data we've collected here, it looks like the overclock on the EVGA 7900 GT is enough to make it a competitor to the X1900 XT. There are plenty of 550+ core clocked 7900 GT parts available from different manufacturers, and these should perform quite well. The X1900 XT still outperforms the 7900 GT at 580/790 in the majority of our test cases by a significant margin. For this reason, we feel that the price difference between the two cards is justified: you get what you pay for by going with the X1900 XT over the 7900 GT.
At the same time, the 7900 GT is no slouch and can hold its own. If the X1900 XT isn't available or is just beyond budget range, an overclocked 7900 GT is a very attractive option. Because of the similarity in price between the stock and overclocked 7900 GT parts, we are recommending that people stay away from the stock 7900 GT no matter what the budget.
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gmallen - Friday, August 11, 2006 - link
Most of the PC enthusiast population interested in mid-range cards are still running AGP motherboards (this is based on sales of pci motherboards vs. agp motherboards). Where are these cards?Josh7289 - Friday, August 11, 2006 - link
They don't exist.
arturnowp - Friday, August 11, 2006 - link
HiIt's written that all card in oblivion was tested with HDR Lighting with X800GTO doesn't support. I think your results are misleading. The same with SC: Chaos Theory...
BTW: Who plays Oblivion with Actor Fade at 20%, Item Fade at 10% and Object Fade at 25% you get better graphics and performance setting those option to 50-60% and turning off grass with consums a lot of power and doesn't look good. In foliage it's better to see your enemies from greater distance the say with a horse ;-)
arturnowp - Friday, August 11, 2006 - link
OK there's writen about SC: Chaos Theory but all in all conclusion are misleading "Owners of the X800 GTO may have a little more life left in their card depending on how overclocked the card is, but even at stock clocks, it might be wise to hang on for another product cycle if possibl" where GeForce 6600GT performe on par with X800GTO. It would be better to exclude X800GTO from charts or mark it as SM 2.0 card. What's better GeForce 6600GT should be tested in SM 2.0 mode...nv40 - Friday, August 11, 2006 - link
Don't why?http://www.xbitlabs.com/articles/video/display/pow...">http://www.xbitlabs.com/articles/video/display/pow...
Some difference of test are so large that it almost shocked me
For instance:
7900GT@84.21 with FX-60 can run 54 FPS avg in 1600x1200 with 4xAA 16xAF in X-bit lab
7900GT@91.33 with X6800 just be 35 FPS ave in 1600x1200 with only 4x AA in Anandtech
Problem of 91.33? Intel 975X? X6800? nVidia?
more than 40% performance difference despite X6800 is far superior to FX-60
coldpower27 - Friday, August 11, 2006 - link
They probably aren't running the same time demo sequences.nv40 - Friday, August 11, 2006 - link
Maybe... but only 9% dif in X1900GT (41 vs 38)And 7900GT test in Anandtech definitely performed much worse then X-bit lab in general
nothing with which is correct or not, but if both are right, the the conclusion may be probably draw like below:
1. Driver problem: 91.33 is much slower than 84.21 (nV Cheat, or 91.33 problem)
2. CPU problem: X6800 is much inferior than FX-60 in game (Rediculous, and far from true in every test)
3. Platform problem: nVidia cards perform much worse in intel chipset (975X)
Sharky974 - Friday, August 11, 2006 - link
I agree. I clearly remember Xbit declaring the 7900GT to win the vast majority of benches vs the X1900GT.In fact overall the X1900GT wasn't warmly recieved. I really feel this deserves some looking into.
For example, I'll have to go look, but I think Firing Sqaud also showed the X1900GT as inferior to the 7900GT.
As it stands now, it's like Anand's platforms are somehow ATI biased, on the other hand I believe Xbit platform is Nvidia biased. Xbit reviews nearly always show Nvidia winning.
Sharky974 - Friday, August 11, 2006 - link
http://www.firingsquad.com/hardware/sapphire_radeo...">http://www.firingsquad.com/hardware/sapphire_radeo...I started on the first page of benches.
As one glaring example:
Firings squad: Quake 4 1280X1024 4XAA 8XAF 7900GT-87.2 X1900GT-60.6
http://www.firingsquad.com/hardware/sapphire_radeo...">http://www.firingsquad.com/hardware/sapphire_radeo...
Anand: Quake 4 1280X1024 4XAA 7900 GT-45.1 X1900GT-49.8
http://images.anandtech.com/reviews/video/roundups...">http://images.anandtech.com/reviews/video/roundups...
With similar settings, FS has the 7900GT getting nearly double the frames Anand does. The X1900GT also gets significantly more in FS review, from 49 to 60 FPS, but nowhere near the change the 7900GT sees, with the net effect the X1900GT eaks out a win at Anand, but loses by nearly 27+ FPS at FS.
The X1900GT is definitly a better card than I had remembered, even at the FS benches though.
Also, FS was using a FX-57. Anand a much more powerful CPU, making results all the more puzzling.
In addition to some of the other suggestions, I'd question drivers. FS was using older drivers on both since it is an older review. Perhaps Nvidia drivers have seen a large performance decrease, or ATI's a similar increase? This seems fairly unlikely, though, as I dont think you normally get huge differences from driver to driver.
Unless Nvidia really was cheating RE 16-bit filtering as the INQ claimed a while back, so they fixed it causing a massive performance decrease? :) Again though, that suggestion is made half-jokingly.
This definitly needs a lot of looking into I fell. Anand's results are quite different than others around the web at first blush.
JarredWalton - Friday, August 11, 2006 - link
Levels can make a huge difference in performance. For example, Far Cry has segments that get about 80 FPS max on any current CPU (maybe higher with Core 2 Extreme overclocked...), but other areas of the game run at 150+ FPS on even a moderate CPU like a 3500+. I don't have a problem providing our demo files, but some fo them are quite large (Q4 is about 130 MB if I recall). SCCT, FEAR, and X3 provide a reference that anyone can compare to, if they want. The only other thing is that ATI driver improvements are certainly not unlikely, especially in Quake 4.