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Crossfire not working. 0% GPU2 usage, 50-60% GPU 1 usage

post #1 of 44
Thread Starter 
Hey guys, so I was testing out my new 7950s and im having trouble getting crossfire to work. I have only one display connected to the first GPU, playing black ops 2 zombies with all settings cranked with my 120hz monitor, but it jumps from 60-120fps and gets only 50-60% GPU usage on GPU one, none on GPU 2. What should I do to fix this?
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post #2 of 44
Quote:
Originally Posted by hammadj View Post

Hey guys, so I was testing out my new 7950s and im having trouble getting crossfire to work. I have only one display connected to the first GPU, playing black ops 2 zombies with all settings cranked with my 120hz monitor, but it jumps from 60-120fps and gets only 50-60% GPU usage on GPU one, none on GPU 2. What should I do to fix this?

Is GPU-z stating that 2 GPU's are enabled???
 
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post #3 of 44
Thread Starter 
Yup, it says it in GPU-z, however the driver version and bus width for my second card are different. Heres a pic:

GPU1:



GPU2:

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post #4 of 44
Your 2nd card is turned off while idling with AMD's power saving feature, I THINK that's why the bus width and bandwidth are far below normal. You would need to manually turn off ULPS in registries.

In 3d mode, even with ULPS enabled, your 2nd GPU should kick on so I'm assuming it's a driver problem? Are you playing in windowed mode? Try reinstalling the drivers with ATIMAN.
post #5 of 44
Quote:
Originally Posted by hammadj View Post

Yup, it says it in GPU-z, however the driver version and bus width for my second card are different. Heres a pic:

GPU1:



GPU2:


Dont believe thats your issue. I just checked mine and have same readings in GPU-Z as you do. I would suggest to go to the 79xxx forum and post your issue there. OCN members there would be more helpful......

I am assuming that you have tried to re-install drivers, re-seat 2nd gpu
 
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post #6 of 44
Nevered played Black ops 2 but are you certain that game supports crossfire????
 
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post #7 of 44
Does cf work in other games?
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post #8 of 44
Thread Starter 
Im downloading Crysis 3 as we speak to test on there.

Also installing Latest Beta drivers
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post #9 of 44
Ok check list.

All 4 PCI-E 6-Pins connected?

Is the crossfire bride cable connected?

Do you have the Crossfire tick box enabled in the catalyst control center?

Double check all thees.

Then the question is: What CPU and motherboard are you using?
    
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post #10 of 44
Could be a CPU bottleneck. Would have been handy if you actually provided the specification and components of your system.
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