Well my replacement under warranty came today, a very new chip, pack date 8th June 2009, FPO # L846C013

No stress testing yet, just seeing how low I can take vcore before it refuses to get to desktop - started with 1.3v and below is stock volts in BIOS, 1.216 in CPUZ

Keep in mind... my Q9550 E0 needed 1.4v in bios even to boot at 4GHz. That was a bad buy, should have gone for this chip straight away