Hothardware analyzes the SLI performance on Windows Vista versus Windows XP.

Quote: "We thought it might be interesting to see what the numbers looked like for the extreme performance junkies in our midst, running dual-graphics SLI setups with high-end DX10 capable GeForce 8800 graphics cards. Is SLI mode on Vista still two steps behind in performance in comparison to XP?
In this article we offer a quick-take assessment of NVIDIA's latest ForceWare driver release, running on Windows XP and Windows Vista installations in SLI mode. NVIDIA seems to have closed the gap a bit and we set out to explore this in some of the most exciting and new game engines on the market."
Read the full report on Hothardware.