i have 3 batch of new 6420 and 6320
E6420 L644G441 are really bad,3ghz need about 1.5V 3.2ghz 1.6V
L649G591 havent tried this one yet
E6320 L648G536 3.2ghz stable at 1.45v as i said on 1st post.
might be a gold one but im waiting for my Coolermaster GeminII CPU Cooler
to try it on my commando =D