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crossfire problems - Page 2

post #11 of 17
Thread Starter 
they are both used
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Super quiet
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post #12 of 17
Ah, that explains why the other 6950 was already unlocked to a 6970. Are both cards running at the same speed since both are now flashed to 6970's? When you ran each card individually, how was the performance? Did you have any issues?
post #13 of 17
Thread Starter 
running them individually both were running perfectly... didnt have any issues...
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Super quiet
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post #14 of 17
If the second 6950 really is a 6970 either flashed or manufactured that way, you should still be able to crossfire them, since the drivers would just down clock the 6970 to match the 6950.. Have you tried moving the top card to the bottom and vice versa? Last ditch effort, I would just do a fresh install of Windows to help rule out any random software issue or old drivers left over.

If that doesn't work, only thing I could guess is that both cards are just not compatible with each other. SLI or Crossfire, its usually recommended to get identical cards.
post #15 of 17
Thread Starter 
i flashed the other card to a 6970, both bios's are the same, clock speeds are the same, everything is identical. ive tried switching them around and everything...
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post #16 of 17

What is the exact problem? I read few times but still don't get it.

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post #17 of 17
Quote:
Originally Posted by Sean W. View Post

alright, so i looked at each card individually
and i noticed one of them had 1536 shaders, that means its unlocked to a 6970, put the other card in, it only had 1408 shaders, so a 6970 and a 6950 were trying to talk to each other... so i flashed the other card to a 6970... and now im going to run some games and benches, see where we are at...

Ha, you mean something like this? I have very similar setup but don't have any of those games to compare. So far what I have played has worked out ok, everything (dirt 3, Deus X) sticks to 60fps for the most part w/ vsync on

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