I overclocked cuz of bottleneck but this link to a thread I started shows you how to overclock and even when I had a problem with ram frequency other members explained
http://forums.overclockers.co.uk/showthread.php?t=18610827
I think even stock voltage to 4ghz is on that as well , best to read through it
http://forums.overclockers.co.uk/showthread.php?t=18610827
I think even stock voltage to 4ghz is on that as well , best to read through it