So, not to Bash On you guys running the OC, But.....i have to say you guys did not try hard enough/ Or got a bad chip. I myself have a phenom II 940, currently on a simple H2O setup i have a 24\7 stable of of 4009Mhz 1.5Vcore and a suicide run of 4.4 1.55Vcore (boots up but BSOD as soon as i try prime95)

i think if you guys got another chip/ or tried again with the Phase you could get a stable 4.5 at a 1.6Vcore