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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augiem - Thursday, August 10, 2006 - link
I wonder which of these cards would accelerate Maya's 3D viewport performance the most...PrinceGaz - Thursday, August 10, 2006 - link
If you're a casual Maya user, then look at the OpenGL performance (Quake 4) for a rough guide. I'm tempted to think though that the GeForce cards should still have the edge in most OpenGL situations so Quake 4 might not be representative.If you use Maya professionally, then none of the cards looked at are for you. A good Quadro or FireGL card will render scenes far faster than any consumer card, and as time is money, will more than pay for itself despite their high cost if that is what you do for a living.
Calin - Friday, August 11, 2006 - link
There was a time when it was possible (although not very easy) to mod a Radeon 9700 into the corresponding FireGL card. This would have been great for you (but now a FireGL based on 9700 could be slower than consumer cards)PrinceGaz - Thursday, August 10, 2006 - link
I've only read the first two pages of the article up to and including the list of prices for the various cards at the bottom of the second page, and haven't read any comments here, but it seems pretty obvious already that the X1900GT is going to be the obvious winner in terms of value for money.I'll be back in half an hour or so after I've read the rest of it.
Gondorff - Friday, August 11, 2006 - link
Indeed, the X1900GT looks very good... which makes me very happy b/c I just bought it a week or so ago (damned slow shipping though...). For those who do care about rebates, the x1900gt can be had on newegg for $200 right now (a connect3d one). I was lucky and got it at $175 before they raised the price... for $15 more than the 7600gt I was going to get otherwise, that's pretty damn good if I may say so myself.Anyway... excellent article; if only it were out earlier so I could worry less about a slightly blind choice... but c'est la vie and it turned out well anyway :).
Kougar - Thursday, August 17, 2006 - link
Good grief, I just found it for $199... and it was previously $175!? Incredible... :(PrinceGaz - Thursday, August 10, 2006 - link
Yep, pretty much as I suspected- the X1900GT is best at stock speeds. Things become a little blurred when factory-overclocked 7900GTs are brought into the picture but while they're faster, they're also more expensive by a similar amount. Both offer great value for money if you need to buy a card now.One thing the article seemed to overlook is that many people who visit sites like this will overclock cards themselves, factory overclocked or not, and this is likely to reduce the advantage of already overclocked cards like the 7900GTs you recommend. I imagine there is a bit more headroom in a stock X1900GT than a factory overclocked 7900GT (especially a 7900GT with a core clock of 580 like you used). Those of us willing to take a chance on how much extra a card has available may well find a user-overclocked X1900GT to be a match for what an overclocked (user or factory) 7900GT can achieve.
coldpower27 - Friday, August 11, 2006 - link
The problem with this is that your using assume performance vs guranteed performance of factory overclocked units, so they aren't comparable.
The point provided is something to keep in mind, but shouldn't be recommended for anyone other then those who know what they are doing. Not to mention the voiding of the warranty when you do when you suggest.
DerekWilson - Friday, August 11, 2006 - link
Also, if you look around, increasing voltage and cooling for 7900 GT cards can yeild results better than a 7900 GTX. Buying a factory overclocked 7900 GT gives you a card that a manufacturer binned as a part that is able to hit higher than stock clocks at stock voltage and temperature. So you should get a more easily overclockable card if you really want to push it to its limits.Genx87 - Thursday, August 10, 2006 - link
2nd from the top for ATI is considered mid grade?Guess that 7950GX2 is pushing them down from the top.