Mine E6420 does 3240Mhz at 1.32850V set on BIOS and it's stable(Orthos 2h, while running 3DMARK06 a lot of times,going trough the web,MSN all at the same time) but with this same voltage it doens't do 3400Mhz and also my Ninja is giving me worse temps then my 9500Led)