Playing with my OC today. Just realizing that after a certain point, my temps really don't go much higher when I raise voltage for more clock headroom. Maybe I didn't test this enough when I switched from air to the H50 cooler.
I was at 1.25V for a 3.8ghz, but I can raise it to 1.34V for 4.2ghz (or more?) and the temps are basically the same. Idling about 38-36-38-36C on all cores. Nice.