My E8500 Q827A366 VID1.25v pack date 8/07/08 needs 1.49v @ 4.48GHz; 1.506v @ 4.51GHz. It is an E0. Bought off Newegg. Complete piece of crap. Got an E8600 off eBay Q822A430, VID1.215v, needs 1.344v @ 4.52GHz, but runs EXTREMELY HOT! That E8500 @ 1.505v Orthos Small FFTs only gets up to 65'c highest, while the E8600 shot up to 79'c!!! Reseated over 10 times. It's the chip. Damn I never had any luck with good chips.