Weekly Freezes

I have:

i7 920 - 2.66 Ghz
Asus P6T Deluxe
2 x 260 Asus Nvidia video cards
6GB Corsair RAM
2 x Velicraptor HD's - Raid 0
Vista 64 - Ultimate

I have installed onto the Maxwell RAID, and had the same issue, formatted and installed on the intel RAID, and the issue continues.

About once a week, randomly, sometimes it could be 2 times in a day, but the system just freezes. I have 2 displays (SLI is disabled to allow this) and it seems that one video card just goes black, and the other leaves its display up. But the system did freeze. The event logs show previous shutdown was unexplected, but thats all.

I have checked the temps, MB temp, 50 degrees, Idle CPU speed is 45-47, I have checked for latest drivers and BIOS, and don't have anything that is out of date. The random freezes are killing me, any one have any ideas of what I should do to isolate the issue?

http://www.newegg.com/Product/Prod [...] 6811144203 is the case.

I have added the northbridge cooler option, and I have added 2 additional fans. I guess I could check the directions thats the fans are going and verify they are out / in, and not all pushing in or something. Anything else? Even at those temps at idle, that wouldn't cause the freezing though I don't think.

RAM is here: http://www.newegg.com/Product/Prod [...] 6820145220

No, I left the RAM as default. No tweaking if I can't get the dumb thing steady without tweaking. =)

No, I have no tested over night, I will run that when I get home for tonight.