ATM, I'm at 3.6Ghz, vCore 1.10625 and max temps 62/58/57/56 on CoreTemp
My question is, can i push on to 4Ghz+ and bump my vCore, raising my max temps of course.
If so, what is the absolute maximum one can reach with say 12h of Prime95?
You should test the CPU at the fan speeds you intend to use all the time. That's one less variable and gives you more reliable test results. If the CPU is stable with the fans on high, but fails when the fan is on low, you may run into some issues. I also stress test my i7 for a minimum of 20 hours to be sure it's stable.
That sounds pretty decent. I'm going into my 14th hour of PRIME95 small FFTs. CPU clock is at 185*20 for a final speed of 3.8GHz with 1.325V. My temps are at 69-71C. You must have gotten very lucky with your CPU.