Hey Ket, I have a doozie of a problem for you...

If I install Win 7 x64 ultimate (normal or SP1), one thread stays loaded at 100%. This is without any driver installs, just a 100% fresh install of the OS.

I've reinstalled 4 or 5 times and this problem has continually occured. Server 2k8 doesn't do this.

Hardware:

cpu: i7 2600K
Mobo: ASRock extreme4
Ram: G.Skill DDR3 2x4gb 1600 9-9-9-24
GPU: MSI GTX 470 Twin Frozr II
SSD: Samsung 470 256gb
PSU: Corsair HX850W
DVD: LG bluray drive