Important Note:
If you guys are aiming for a high CPU Clock testing like 4.5Ghz DO NOT USE BIOS 1003.
At first I thought my E8500 has degraded but it wasn't. With 1.35v I can pass 10 loop IBT @600x7.5 without a single problem. But with 1003 BIOS no matter how hard I tweak still a no-go although an increase of vCore might help a bit.