CPU/Mobo Lesser fps/benchmark scores while gaming on Windows 7 x64

[Devan232]

While doing CPU benchmarks, I noticed that my benchmarking scores are lesser than that of Windows XP. Isn't Windows 7 x64 supposed to give more fps than Windows XP in benchmarking softwares? This happens in 3D Mark, Passmark and some CPU dependent games like GTA IV. I'm getting more fps/benchmark scores on Windows XP than on Windows 7. I heard AMD FX 8150 had a similar problem with Windows 7 but got fixed with a simple registry tweak. Does anyone have any idea if some feature on Windows 7 is stressing the processor more? I tried disabling all visual effects but Windows 7 x64 was still giving lesser fps than my old Windows XP

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Not only me though

I saw a slight drop (2 percent) in PCMark scores moving from Windows XP to Windows 7, but XP was 7 percent better than Vista and Windows 7 was still 5 percent better than Vista. I saw even bigger improvements going from Vista to 7 when testing with PCMark Vantage. This means that, among the three OSes, XP would be (marginally) better at gaming, since the test has a bent towards tasks performed by games. Keep in mind, however, that newer games that require DirectX 10 or 11 won't run under XP in any case. Another marginal win for XP over Windows 7, and another dismal showing from Vista.