I was wondering if 1.6v is a tad too high for this cpu, i've seen other people reaching 4.4 with 1.6 etc. At the mo im running 4.1 @ 1.5v but thats the furthest i feel i should go. Im currently using this cooler http://www.overclockers.co.uk/showproduct.php?prodid=HS-002-PT. Been running prime95 on the max temp test for an hour or so now and it hasnt passed 47c so the temps are under contro.