Yes. It works fairly well on my gaming system. It is fairly stable, but the drivbers you need for some hardware to work still isnt availible. Although I do have to say that it does help with alot of the systems performance. It helps processing large apps. I think that the beta version is still a free download from microsoft..... What are the specs of your computer?
I am running an Athlon 64x2, 2 gigs of ram, ~450 gigs of storage, DVD-R, and some other goodies.
And it runs XP x64 fairly well.