The E8500 still performed like a champ on the X38 based board I tested it on; and I was able to reach a stable overclock of 4.275GHz while only air cooled.

I was able to get to the Windows desktop at 4.52GHz - however it was not stable, and I did not wish to crank Vcore high enough to stabilize it. The Intel data sheet shows 1.46V to be the maximum safe Vcore for the E8500, so I did not want to exceed that by much. 1.468V was enough to get the system table for all our benchmarks at 4.275GHz.