i increased the core voltage to 1.5v. Any higher the temp goes too close to 60 C resulting BSOD.
ive used 1.55 on my current phenom.
it doesnt bsod me. but anything past 3.7GHz will.
my bios idle temps with 1.55 were 34c, but then again, my mobo doesnt offer much past 1.5vcore in bios.