Bad Consitancy......

Hello all,
This is my first thread so bear with me.

PC Specs:
MSI K9N2 SLI Plat MOBO
AMD Phenom 9950 Black (140watt)
OCz Reaper Edge 1066 DDR2 Ram (8 Gigs)
Raidmax 730ss PSU
MSI GTX 260 GPU
Western Digital 500GB HDD
LG DVD/CD Burner
Vist 64bit
Xclio A380 Plus

My Problem:
Constant freezing. No mouse, keyboard, or anything function. Requires hard re-boot.

Causes:
Unknown specifically, however I can force a freeze with WoW even on lowest settings and the Vista Rate your PC thing.

Things I have done already:
Ensured all drivers are up to date.
Removed all but one stick of 2 gigs ram and rotated them all through with no difference in general perfomance.
Contacted Vista Tech Support....;( Not much help but hey, whatever.
Vista TS lead to CHECK DISK (forever) and new install of Vista.
Which lead to their conclusion that my GPU was going bad.
My Previous GPU was an EVGA 9600 GT, so I purchased the above MSI GPU. Installed and works like a champ only I still can not complete the Vista rate your pc thing without it freezing.
I have yet to re-install WoW to see if that still causes it also as I am at work till Monday.

Other thoughts:
I built my own PC so that might be my problem. Though I would considder myself somewhat tech savy I know i'm kidding myself when talking to the likes of you all However, I have a friend at work that has built several PC's and helped me at every step of this build from research to super glue on my "finned" finger tips. (thanks Zalman) Only he is dealing with major chick drama and I need assistance before I see if a size 11 Danner fixes my PC.

Please Help if you can.....

V/R,
Don

I suspect it could be one of three things, in this order: Bad memory, bad CPU or bad HDD.

Plug in each stick individually and try the test again. If that all checks out, grab another CPU that will fit in your board and try that. If that fails, i believe it's possible that your HDD is on its way out. What kind of freeze does it do? Does it completely lock up where you can't move the mouse, or does every application lock up (including windows explorer) but you can still move the mouse?

Well I got home after letting my PC sit on the desktop for a couple days while I was at work. I ran WEI twice and both passed. I guess it needed some time to deal with the GPU change. Thank you for your response. And to answer your question, they were freezes where nothing works. Even the HDD activity light stayed unlit.

Thanks again,
Don