Running 2 sapphire 5830s on a amd 790X - G45, phenom 720 x3. Drivers are 10.6 ccc. Using both xfire connectors. Running windows 7 x64.
With Crossfire enabled, gpu-z display s crossfire enabled, correctly.
Future mark vantage score is 17900 for performance, 12888 with crossfire disabled. Crossfire appears to work correctly using vantage.
However playing the following games: Crysis warhead, Operation Arrow Head, Modern Warfare 2, Bad Company 2 show no fps increase with crossfire enabled. In BC2's case, fps actually drops by about 20 with crossfire enabled.
BC2 1600x1200 High settings no aliasing/anthrosophic no hbao
40ish with crossfire
50ish without.
I check gpu utilization in gpu-z, while the clock cycles are maxed out on both cards, gpu load on second card never goes above 0, in any of the above games.
Any idea what is causing this?
With Crossfire enabled, gpu-z display s crossfire enabled, correctly.
Future mark vantage score is 17900 for performance, 12888 with crossfire disabled. Crossfire appears to work correctly using vantage.
However playing the following games: Crysis warhead, Operation Arrow Head, Modern Warfare 2, Bad Company 2 show no fps increase with crossfire enabled. In BC2's case, fps actually drops by about 20 with crossfire enabled.
BC2 1600x1200 High settings no aliasing/anthrosophic no hbao
40ish with crossfire
50ish without.
I check gpu utilization in gpu-z, while the clock cycles are maxed out on both cards, gpu load on second card never goes above 0, in any of the above games.
Any idea what is causing this?