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Can I crossfire a 7970 with 7950 by overcloking the 7950?

post #1 of 8
Thread Starter 
I currently have one 7970. The thing doesn't take to overclocking very well unfortunately but I found a 7950 locally for very cheap. Assuming the 7950 can OC to the same core and memory clocks as the 7970 would this crossfire setup work just as effectively as if I had 2 7970's?

If so, I may do this setup to help with some FPS issues I have in certain games.

I assume the microstuttering is still not fixed with the AMD cards? I haven't looked into it for months now...Google tells me it looks like there will be a fix in July?
post #2 of 8
You would most likely want to flash the 7950 and check for stability first. Then you should be able to crossfire.
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post #3 of 8
Quote:
Originally Posted by PearlJammzz View Post

I currently have one 7970. The thing doesn't take to overclocking very well unfortunately but I found a 7950 locally for very cheap. Assuming the 7950 can OC to the same core and memory clocks as the 7970 would this crossfire setup work just as effectively as if I had 2 7970's?

If so, I may do this setup to help with some FPS issues I have in certain games.

I assume the microstuttering is still not fixed with the AMD cards? I haven't looked into it for months now...Google tells me it looks like there will be a fix in July?

It'll work, but only as fast as 7950 x 7970 crossfire, not 7970 crossfire.
post #4 of 8
Thread Starter 
Even if the 7950 is overclocked to match the 7970? It will then be no where near 2x 7970's?

And are you able to flash the 7950's just like you were the 6-series cards? So it'd effectively make it the higher-tiered card?
post #5 of 8
Quote:
Originally Posted by PearlJammzz View Post

Even if the 7950 is overclocked to match the 7970? It will then be no where near 2x 7970's?

And are you able to flash the 7950's just like you were the 6-series cards? So it'd effectively make it the higher-tiered card?

No.
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post #6 of 8
The 7950 is close to the 7970 in performance anyway, a few frames per second behind. Nothing noticeable (when overclocked).
http://hexus.net/tech/reviews/graphics/34761-amd-hd-7950-vs-hd-7970-clocks/?page=3
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post #7 of 8
i had the 7950 and 7970 crossfired with each ran on their own clocks. i did not even bother synching them using any program but i did have ulps disabled (even in single gpu config). did not even try radeonpro. played BF3, C3 and C2 smoothly but Valley was a terrible mess.
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post #8 of 8
Thread Starter 
Well cool, thank you all for your info!

Maybe now that 7970's are dropping in price I'll snag one of them up. That coupled with the crossfire microstutter fix next month should be a good time to pick up a 2nd card!
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