Originally Posted by andy_nv
I bumped the voltage all the way up to 1.5V when I had an E6600 @3.6GHz. True, it showed as ~1.42V in Windows and went down to 1.36-1.38V under load. For 3.4, I think it was at least 1.4V.
You could also try changing fsb termination and northbridge voltage.
Yeah mine is at 1.4 now... A bit above it, but like you said in Windows under most programs, and even in the bios it shows at 1.38V