While there were a couple of cases where WinXP outran Windows 7 and Vista, for the most part Windows 7 wins more than it loses, especially when you factor in multi-GPU technologies like SLI and CrossFire. In fact, if you’re a Windows XP gamer with SLI or CrossFire, I’d definitely urge you to upgrade to Windows 7 as soon as possible.
Windows XP’s origins date back to Windows 2000, an OS that was never designed for multi-GPU.
On the other hand NVIDIA and ATI worked closely with Microsoft to get Vista’s DX9.0L and DX10 APIs to scale more efficiently with SLI and CrossFire. Memory management tweaks found only in Windows 7 increases this even further, allowing SLI and CrossFire to scale even better under Windows 7 in comparison to Vista in many games.
Going into this article I didn’t expect the gains to be as great as they were, but the benchmarks don’t lie. Windows 7 is a huge improvement over XP in this regard.
The 3-Way battle between Windows XP, Vista, and Windows 7 is much closer when you exclude the second GPU benchmarks; other than ARMA II, the Radeon and GeForce GPUs performed remarkably similar regardless of OS (as long as you exclude the GeForce Windows XP x64 numbers). No one OS really pulls away from the other, they just trade wins and more often than not, they’re tied in performance. For this reason I’d have to give the overall nod to Windows Vista and Windows 7, as they generally run just as fast as XP, with the obvious addition of DirectX 10 and DX11 support.
So is Windows 7 the best OS for gaming? Based on the results we’ve just looked at, I’d have to say “yes”. Windows 7 delivers the best combination of features and game performance of any OS tested today. From what I’ve seen so far, it’s also just as stable as Windows XP and Vista and seems more responsive. The addition of gestures and the new taskbar really push Windows 7 over the top.