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6950 Crossfire Problem

post #1 of 14
Thread Starter 
My 6950's in crossfire are performing like crap. I upgraded from a 5970, for the added memory for eyefinity. In BFBC2 I get these checkered looking artifact things when I move around. I get about 45fps on 2 cards and in the 50's with crossfire disabled, that just aint right cause my 5970 was doing in the 60's. This is all at approx 4800 x 1200 give or take due to bezel compensation. My system is as follows. I've used catalyst 11.3 - 11.5, all same issue, I uninstalled properly each time and wiped residual driver trash with Driver Sweeper.

Asus P8P67 mobo - the second pcix slot is set to 4x in bios, not a big deal if you look at comparisons of 8x & 8x vs 16x & 4x.
I7 2600k @ 4.8Ghz stable, watercooled, does not go over 53C when gaming
GSkill Ripjaws- 8GB 1600 Mhz - not overclocked
2 x MSI 6950 2GB - air cooled - not overclocked
PSU Corsair TX950W
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post #2 of 14
you did enable crossfire....right?...sorry...reread and see where you disabled to test
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post #3 of 14
Thread Starter 
I sure did, I'm going to switch the slots of the cards and see if that does anything..
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post #4 of 14
Hi stryker7314. Yes the best thing here would be to swap the two graphics cards around to see if you encounter the same problems. Also test each of the graphics cards on their own to see if either of them produce problems. Do you see the graphical problems from boot?

Harry @ Videocardshop.
post #5 of 14
I would also recommend putting just one card in your PC (re-install driver if you have to with just the one card) and see what you get. Once things look good, shut your PC, take it out, put the other card in and see what you get. If both cards work just fine individually (not by simply disabling crossfire - I mean just the one card in your PC. period), then shut your PC, put both cards in, connect bridge and simply start your PC and see what you get. You do not need to re-install drivers in each case. It could be very well one of the cards may be bad.
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post #6 of 14
Quote:
Originally Posted by stryker7314 View Post
My 6950's in crossfire are performing like crap. I upgraded from a 5970, for the added memory for eyefinity. In BFBC2 I get these checkered looking artifact things when I move around. I get about 45fps on 2 cards and in the 50's with crossfire disabled, that just aint right cause my 5970 was doing in the 60's. This is all at approx 4800 x 1200 give or take due to bezel compensation. My system is as follows. I've used catalyst 11.3 - 11.5, all same issue, I uninstalled properly each time and wiped residual driver trash with Driver Sweeper.

Asus P8P67 mobo - the second pcix slot is set to 4x in bios, not a big deal if you look at comparisons of 8x & 8x vs 16x & 4x.
I7 2600k @ 4.8Ghz stable, watercooled, does not go over 53C when gaming
GSkill Ripjaws- 8GB 1600 Mhz - not overclocked
2 x MSI 6950 2GB - air cooled - not overclocked
PSU Corsair TX950W
x4 for a gpu will reduce it's performance, can you check on a 8x8 or 16x16 board?
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post #7 of 14
Thread Starter 
I tested each card individually, they both work fine. I tested crossfire and eyefinity in Stalker COP and it works great. It's BFBC2, no worries it runs good with one 6950 with unlocked shaders and overclocked to 900/1400. Sad thing is I upgraded from a 5970 for increased memory and performance and the 6950 runs just slower than the 5970.
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post #8 of 14
What is your res?
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post #9 of 14
Installed the latest CAP? Is BFBC2 updated to the latest patch?
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post #10 of 14
well the best this 1 of them can easily max BC2 at 1080p anyway

I find looking down sniper scopes was the only thing that ever drops my fps below ~40, not sure why that happens
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