SLI Performance
S.T.A.L.K.E.R. – Direct3D

Notes
Unfortunately, Catalyst 7.2 doesn’t appear to have a CrossFire profile for S.TA.L.K.E.R., performance was unchanged under dual GPU CrossFire configs. We even tried forcing CrossFire’s AFR mode by changing the Catalyst A.I. slider to advanced, but this didn’t help. Hopefully ATI will issue a hotfix to address this, but for now CrossFire users are out of luck.
Fortunately, as you can see NVIDIA’s SLI technology scales well out of the box with NVIDIA’s latest ForceWare drivers for the GeForce 7 cards. It appears the GeForce 8 cards need a little more driver work, as the GeForce 7950 GT SLI setup actually outperforms the 8800 GTS 320MB SLI config at 1280x1024. The GeForce 7600 GT SLI setup wasn’t able to complete these tests, as we saw severe tearing on screen when SLI was enabled.