My cousin and I have built an AMD rig yesterday, and it's constantly freezing and locking up. It does not blue screen or restart itself, it just freezes until you reset it. It was based off of a defected M5A87 before and it's on an Asus M5A88-V EVO motherboard right now. Here are the specs.
AMD Phenom II x4 955 CPU @3.2Ghz
Asus M5A88-V EVO MOBO
G.SKILL Ripjaws (2x4GB)
XFX 6870 1GB HD687AZNFC
1TB Seagate Barracuda 7200 RPM
Cooler Master Hyper 212+ Cooler
Cooler Master 650w Power Supply
Here is a picture of the HWMONITOR stats after it froze: http://i.imgur.com/bRxCM.jpg
And a screenshot of how long it lasted in Prime95 before a freeze (4:48): http://i.imgur.com/yXoZH.jpg
AMD Phenom II x4 955 CPU @3.2Ghz
Asus M5A88-V EVO MOBO
G.SKILL Ripjaws (2x4GB)
XFX 6870 1GB HD687AZNFC
1TB Seagate Barracuda 7200 RPM
Cooler Master Hyper 212+ Cooler
Cooler Master 650w Power Supply
Here is a picture of the HWMONITOR stats after it froze: http://i.imgur.com/bRxCM.jpg
And a screenshot of how long it lasted in Prime95 before a freeze (4:48): http://i.imgur.com/yXoZH.jpg