System freezes randomly

[Guest]

Hi, I've got problem :]
Today have bought new parts, and connected everything:
Intel Core i5-2310, 2.90GHz, 6MB, LGA1155, 32nm
ASUS P8P67 LE Rev.3.0
Plextor DVD+/-R 24x SATA
ASUS EAH6850 Radeon HD 6850 1GB GDDR5 (256bit), HDMI/2xDVI/DP
Antec Three Hundred ATX
be quiet! Straight Power CM BQT E8-CM-680W, 80plus silver
Seagate Barracuda 7200.12, 3.5'', 1TB, SATA/600, 7200RPM, 32MB cache
CORSAIR PC Dominator 2 x 4 GB DDR3-1333 - PC3-10600 - CL9

Looks great, very quiet... Time to install system (Win 7 x64), drivers, and so on. And it freezes. Completly randomly - during installing any program, during changing settings in Operating Panel, during doing-nothing
Screen freezes, keyboard is not reacting, mouse too. Only reset helps. About 3 minutes ago it happened during loading Windows - on 'Welcome' message. Do You have any ideas?

 

[pjmelect]

This freezing is nearly always caused by memory problems, even when the memory passes all memory tests. You can see if running with only one stick of memory improves things or try increasing the memory voltage. Sometimes I have found that the only cure is to use a different brand of memory.