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Performance problems with BF3 (5850 cfx)

post #1 of 8
Thread Starter 
1. Game uses my second GPU at 99% and first GPU is 0% (yes I am in fullscreen)
2. When I change my resolution from 5760x1080 to 1920x1080 I can't see the menu screen anymore
3. Sometimes my first GPU will have 30% usage and the second 99%
(On one occassion....both GPUs were on 99% and gameplay was butter smooth for 2 minutes but then the first GPU dropped to 30% and it has been like that since)
4. MY CLOCKS RESET EVERY TIME I DO SOMETHING and I always have to go in and re-set my overclock....

What's going on..if anyone knows...

I'm on 11.9 CAP1..I would install CAP3 but everyone says it is causing massive stuttering (and crossfire alone makes it stutter enough)
post #2 of 8
I don't think the game and drivers have much support for the 5 series GPU's from AMD. In general, i think AMD are lacking good drivers. This months driver offers no additional support to the game either. You might want to look into an upgrade. I would imagine that your 1GB of Vram at this high resolution is causing most of your performance issues and lower GPU usage.
X79-GCN
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X79-GCN
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Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
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post #3 of 8
Thread Starter 
Well I've found some workarounds (not solutions):

Closing+reentering the games sometimes resolves problem #1.
I have to disable Eyefinity and then run the game and issue #2 is not present.
Issue number #3 is only present in multiplayer, in single player both GPUs are in the high 90s (good!!!)
Issue #4 is still present, and still annoying.

No, I do not need an upgrade. I don't have any money either.
post #4 of 8
Best I can say is try the 11.10 preview drivers....no clue if it will help but its worth a shot. Also remember don't skimp out when you uninstall catalyst and make sure you use a driver cleaner in safe mode to completely clean any remnants of the old driver (I learned this the hard way the other day myself). Despite what the above poster says it definitely speed up BF3 a bit for me (actually around 12-15%ish)....not sure if it can fix things like crossfire issues but never know till you try.
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The Thubanator
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post #5 of 8
your issue is the crossfire array. I'm having horrible issues with mine as well. I took one card out and the game runs fine. Added it back and the game is crappy.

This is a driver issue and ATI needs to hop on the ball and fix this.
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post #6 of 8
Uninstall all caps and drivers and then install 11.10 preview 3 drivers and no caps
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post #7 of 8
Thread Starter 
I intend to do that when I find the time to.
post #8 of 8
before i got my 6950 xfire i was playing beta with eyefinity on medium/high no aa and 16xAf and was getting around 40fps on average.
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