We have at this point, just finished the past 25 minutes of running Prime95.
I have stablized at 4.5ghz overclock, at 1.56v(according to MSI Commander) (Yet in bios it said 1.46) max CPU temp was 34c and Core Temps never went up above 44c on each core.
This is while running on a Seidon 120v with push into the case and pull from the top of the case and MX4 Thermalpaste
So we have Idle temps ranging from 15c-24c so I would say not to shabby on the overclock temps.