My 280X 3 Way Crossfire setup is not working anymore. I am running 3 XFX 280X Black Edition. 2 Way Crossfire was working fine but since adding the 3rd card things have gotten weird.
First issue was GPUZ was freezing when I monitored the 2nd or 3rd cards. Using GPUZ to monitor the first card is without issue.
Heaven benchmark runs only one card; it will not run the second or third card. Benchmark scores are the same using single, 2 way or 3 way crossfire.
Metro LL Benchmark works sometimes in CFX. The one time it worked I was able to get 58, 76, and 80fps. This scaling doesn’t seem right but I was happy all 3 cards did something.
Metro 2033 and BioShock Benchmarks have the same issues as Metro LL Benchmark. The FPS were different but similar in results.
3D Mark 11 graphics score was 23,323 for the 3 way cross fire setup so that seems to be working well.
I have done all the basics, uninstalled and reinstalled drivers. I even went so far as to uninstall from device manager then ran AMD clean install utility before reinstalling. Uninstalled GPUZ. Disabled crossfire from CCC. Tried different crossfire combinations in CCC.
Any thoughts before I try a fresh install of Win7 64
ASUS 990FX Sabertooth Mobo, AMD 8320 @4.2GHz, 8GB Corsair Vengeance RAM 1600, Brand new 2Tb Seagate HDD, EVGA 1000G2 PSU, Corsair H100i
First issue was GPUZ was freezing when I monitored the 2nd or 3rd cards. Using GPUZ to monitor the first card is without issue.
Heaven benchmark runs only one card; it will not run the second or third card. Benchmark scores are the same using single, 2 way or 3 way crossfire.
Metro LL Benchmark works sometimes in CFX. The one time it worked I was able to get 58, 76, and 80fps. This scaling doesn’t seem right but I was happy all 3 cards did something.
Metro 2033 and BioShock Benchmarks have the same issues as Metro LL Benchmark. The FPS were different but similar in results.
3D Mark 11 graphics score was 23,323 for the 3 way cross fire setup so that seems to be working well.
I have done all the basics, uninstalled and reinstalled drivers. I even went so far as to uninstall from device manager then ran AMD clean install utility before reinstalling. Uninstalled GPUZ. Disabled crossfire from CCC. Tried different crossfire combinations in CCC.
Any thoughts before I try a fresh install of Win7 64
ASUS 990FX Sabertooth Mobo, AMD 8320 @4.2GHz, 8GB Corsair Vengeance RAM 1600, Brand new 2Tb Seagate HDD, EVGA 1000G2 PSU, Corsair H100i
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