I raised the vtt to 1.4 which is max as i hear anything over 1.4 i could fry my chip .I also took gtls up to -80,s still fails prime95.I am begining to think is this all worth the hassle and just keep it at 3.6ghz at reasonable voltages runs stable no freezing issues.I give up this chip is a lemon.4ghz was my goal would have been really nice but failure after failure my hands are up in the air.