New PC freezing. Need help!

[GodForHire]

Hi and thanks for taking time to help.

ASUS Striker II NSE 790i
GTX 280 1GB
OCZ Gold 4GB(2x2gig) DDR3 1600
Intel Core 2 Quad Q9550
Coolmax 1200W
WD 1TB 7200RPM
XP

I finished putting a new PC together last week and I've been having freezing issues with it.

First I installed the Windows 7 beta and when I would play games the PC would freeze after 10-30mins and just hang there. I couldn't alt-tab, ctrl-alt-del or do anything to get out of the game but just reboot the PC. I thought it might be a windows 7 thing so I reformatted and installed XP.

After getting the XP install finished and the newest gfx driver installed I tried to play a game and it froze up and just hung there again.

Getting this PC running as been a hell of one mess up after another. Now I'm almost done and this crap crops up. If anyone can tell me what I need to do to get this working I would greatly appreciate it.

Thanks in advance,
GFH.

 

[Cache]

Which game? I know that BF2142 has a known error with some quads unless you set the affinity for only one core.

 

[aikigi]

Does it freeze if you do something else than gaming ?
Did you overclock your computer?

 

[GodForHire]

It has hung up once well watching a flash video in Firefox. I havent done any overclocking.