Prime95 says my system is chugging along just fine, according to a 5-hour test. For closure, i'm just going to say that ported games suck balls n_n
My system was Prime stable in small fft and blend for 24 hours each. Nevertheless, couldn't play GTA 4 for longer than 20 minutes without crashing. Went to stock and that fixed it. I was prime stable at 4.0, when I lowered it to 3.7 for GTA my issue went away. Never had problems with any other games at 4.0.