I just built the computer a few days ago,
Phenom II 965 BE 3.4ghz
990FX-UD3 Gigabyte
M2 Silent Pro 620W
1TB 7200RPM 32mb cache HD
120GB kingston SDD
hyper 212 evo Cooler
Gskill 8gb DDR3 Sniper 1886mhz
Bitfenix Fan controller
XP runs fine I am using that now.
I have tried booting from a CD installing while using XP
after it installs and goes to the starting windows screen a blue windows screen comes up that says Windows 7 did not install successfully and it reloads XP
I have done memtest, tried installing with only one stick of ramx I have tried on the SSD and the Hard drive but it wont work. I have tried 3 different versions of windows 7