So I've been fooling around with my new build and Playing Arkham City. I'm using a pair of 6950 1gb in CFX and just swapped out a gt430 with a friend's 9800gt dedicated to hybrid PhysX. At 1920x1200, DX11, Physx high, normal tesselation, fxaa high and all other settings at their highest I'm seeing around 50fps avg on the benchmark with crossfire disabled, but only 38fps with crossfire enabled. Max is 72 either way. I have a second monitor showing the desktop with various monitoring tools, so I can see that I am getting usage on both GPUs (although only about 40%), as well as usage on the 9800gt for physx. Without crossfire, the single 6950 shows around 90% usage. Unfortunately I can't compare to what I was getting using the gt430 for physx because I didn't realize hybrid physx wasn't working (turns out the newest physx sw 1107 doesn't work with 1.05ff mod). I was running physx high on my 2500k without realizing it and only really losing a few fps, which odd enough, is pretty inline with other reviews. So anyways, anyone else have a CFX with hybrid physx setup and seeing the same negative scaling?