Use fixed vcore instead and try 1.2v, it would also likely serve you well to delid your 3770k, time and again people have shown they shave off at least 10c by delidding, applying your own TIM then popping the IHS back on top. The issue with the 3770k and 3570k is that the black sealant doesn't allow the IHS to properly make contact with the core, which is what gives rise to the horrible load temps the instant you try to OC. For reference my 3570k which I have delidded, cleaned off the black sealant, used some Arctic MX4 then just sat the IHS back on top of the CPU now has a max temp of 67c on its hottest core fully loaded with boinc @ 4.5GHz 1.12v. For me going faster than that requires quite a voltage bump, even 1.175v doesn't allow 4.7GHz to even be marginally stable so given IBs tendency to heat up easily 4.5GHz has to do for me, not that 4.5GHz is anything to sniff at you aren't really going to see the difference between 4.5GHz and 4.8GHz or even 5GHz in 99% of cases.