Performance for 700MHz+ on G71 GPU

L

Laminator

Weaksauce
Joined
Jan 31, 2007
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Hi there; I've got a 512MB 7900GT that I'm running at 7900GTX speeds with a Zalman VF900-Cu. My highest stable overclock on the card is 675MHz on the GPU; whenever I go higher, my computer locks up and I have to restart. My temps never go above 61 degrees so I'm guessing that I need to voltmod my card to hit 700MHz.

For those of you that have 700MHz+ on your 7900-series cards, I was wondering if you noticed a big difference between that speed and, say, 650MHz. I'm trying to improve performance in Rainbow Six: Vegas and I was wondering if 700MHz on the GPU would yield acceptable performance with all the settings at maximum at 1280x960. I don't really want to voltmod my card but if it means that I can run Rainbow Six: Vegas one resolution higher, I'll do it.

Thanks for reading.
 
From 650 to 700mhz on the GPU is an increase of about 7.5%. In realworld gaming, the actual performance increase will be more like 3 to 5%. You would never know the difference without a timed benchmark.
 
Agreed. My 7900GT (256MB) will do up to 690/1800. Factory Vcore on the model I have is 1.45. I really dont think its worth it to volt mod the the card. 650+ is damn good for a 7900 series, and I think anything more than 1.45 vcore is just looking for problems.

I can run some specific benches if you want me to to give you a frame of reference.
 
Thanks for the replies, guys. Yeah, I don't think it's going to be worth it...the real-world performance difference will probably be unnoticeable. I'll be happy with 675MHz...

EDIT: I did some 3DMark06 runs. At 650MHz, I get ~6,300. At 675MHz, I get ~6,600. Just in case you guys were curious...
 
Stock for me was 650 core on my 7900GTO, made it to 720 stock (though it had lockups at about 708-712, which actually went away when i went above that range). Memory made it to 800, which i was impressed with. The performance increases netted me maybe 5% increase in frames, which, you know, every little bit helps. But if its gonna require vmodding and extra work that could potentially heat it up and etc, its probably not worth the effort if you're getting such a high overclock already. I mean, your card is running as fast a 7900gtx. that's a great thing :)
 
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