I remember a similar question being asked a couple months ago. How about you use the SEARCH FUNCTION?
Could I buy a standard 7900gt and oc it and get it to run exactly the same as the facotry overclocked chips?
Maybe. If the cooling on the two cards is the same, I don't see why you wouldn't be able to OC the standard card to the higher speed.
However, if the cooling is not the same (and there have been a lot of problems with the factory-OC 7900GTs frying), then you might fry your card overclocking.
Because of the frying problems with these cards, I'd forget about the 7900GT and get this Sapphire X1800XT for $200. It's cheaper than any 7900GT, performs about the same, and doesn't have overheating issues.
Most 7900GTs if they have the same cooling as the overclocked ones can go to overclocked speeds, but it voids your warranty and all that blah. If you really want to overclock your card, try going aftermarket maybe, or try to find a card that has better than stock cooling. My friend has a 7900gt from EVGA, I don't think it's overclocked, and he can overclock it pretty well.
I just bought a EVGA 7900GT KO 500/1500, and did a lot of research before purchasing it.
First, no matter what company you get it from make sure it has the larger cooler. It should cover all of the memory chips. There are still some models availabe with the smaller cooeler that only covers the GPU, do not get one of those.
Second, most companies have addressed the "frying" issue. I know EVGA has come out with newer models, which so far have not had any problems compared to the older models. Old; N560, N562, N563, N564. New; N580, N582, N583, N584
I went with EVGA because of the life time warrenty +1.
I have yet to OC my card, but I expect it to be very receptive to OC. The highest factory OC from EVGA out now it 580/1580, compared to the 450/1300 stock. If I can get my GPU up to 550 I will be very happy.
Just to let you know I'm REPLACING the EXACT same card for a 7900GT. That card has terrible issues with drivers, runs SUPER hot, the fan is the noisiest thing out if ran above 30%.
Funny, I have the exact same card without issues. Gaming it stays under 49% fan speed 99% of the time, and it's quieter than the evga 7800GT it replaced. It's in a quiet system with two low rpm 120mm fans and the card isn't bad at all. Plus, it pumps the heat out of the case unlike a 7900GT. Not that all 7900GT's are equally cooled, but Digit-lifes noisiest card they have tested is not a X1800XT or X1900XT, but instead a 7900GT!!