I watched my temps closely during my Prime95 runs and it never got above 62 C using the small FFT test. Idle I'm around 34-35 C, cooler on colder nights. I so want to push her further but I don't want to push the temps any higher. And at 1.47 volts (BIOS) I don't want to add much more voltage if any. Right now I'm at 9 x 430 Mhz for 3.87 Ghz. I think I'm very close to my max temp without good water cooling and if Intel's voltage spec is 1.5 then I really can't go any higher on that if I want my cpu to last another year at least.
-J
watch your tempsmake sure your processor fan and heat sink is clean, when mine is clean i can run 2.8 stable but once dust builds up it gets to hot to run at the over clock