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Crossfiring 7950 amd 7970 - Page 2

post #11 of 18
I crossfired a 6990 with a 6950 it will work just have to clock the 7950 as high as possible so you don't lose out on the 7970 performance. thumb.gif
    
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post #12 of 18
Thread Starter 
Quote:
Originally Posted by MrWhiteRX7 View Post

I crossfired a 6990 with a 6950 it will work just have to clock the 7950 as high as possible so you don't lose out on the 7970 performance. thumb.gif

So before I make the order, I read a review where the 7950 clock for clock is 1-5% less compared to 7970.

So this means CFX 7950+7970 is 0.5-2.5% less compared to 7970+7970 clock for clock, correct?

Edit--> because 2x 7950 is 1-5% less then 2x 7970 clock for clock, my setup is between them?
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post #13 of 18
Quote:
Originally Posted by grandpatzer View Post

So before I make the order, I read a review where the 7950 clock for clock is 1-5% less compared to 7970.
So this means CFX 7950+7970 is 0.5-2.5% less compared to 7970+7970 clock for clock, correct?
Edit--> because 2x 7950 is 1-5% less then 2x 7970 clock for clock, my setup is between them?

Your setup is around 9-10% slower than 2 7970s in CF
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post #14 of 18
Thread Starter 
Quote:
Originally Posted by m3t4lh34d View Post

Your setup is around 9-10% slower than 2 7970s in CF

So if I overclock the 7950 to 925/1375, my setup is 10% slower vs 7970 crossfire.

Can you please inform me how you come to this conclusion?

I think that's still ok for my intentions.
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post #15 of 18
Here some proof of past series cards to give you an idea how they can be cross fired.



415


Hope that gives you some idea. smile.gif
     
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post #16 of 18
A 7950 has to be clocked higher than what a 7970 comes at stock to be close to it's performance. Think of the 7950 as a stock gtx580.
    
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post #17 of 18
There are no fullcover blocks for 7950s, nor will there ever be since here is no reference design available.
7950 and 7970 will crossfire, the loss of performance will be most noticable in higher resolutions, possibly 10% less in eyefinity.
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post #18 of 18
Quote:
Originally Posted by Evil262 View Post

It's common knowledge. You haven't been able to cross cards like that since the 5850/70.

Serious misinformation is serious.
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