Not sure what to tell you with that 750i there. and why is 1.31 your limit. that is stupid. When Intel says the limit for vcore is 1.36 and that is just them being EXTRA Cautious. when really we can run these Q9650's at 1.4v all day!

Also nas, I think part of your problem is that ghetto Nirvana cooler, you have one of the best s775 CPU's on the market. that was a pretty penny to buy, yet you have a $25.99 cooler on it. I'd suggest you get a TRUE, or a S-1283, or a Cooler Master V8 on that thing. and then you'll be better. OCCT fails with anything over 62c. (That was OCCT's Default when I installed it on my system). so that could be why.

my 750i was only able to take my Q6700 to 3.66 Ghz. but my 750i got my Q9650 to 3.8 Ghz my FIRST time. and 4.0 Ghz was just a few voltage clicks higher. I've done 3DMark06 runs at 4.3 Ghz also. but not stable. but then I've never went over 1.38 on vcore either.. but that is because I live in a desert and didn't have water. but now I'm running water, and I change my voltage all the time.