I was able to reach 11 x 273= 3003Mhz @ 1.45v (Stock cooler) on this ASRock 939DUAL-SATA2 motherboard (BIOS 1.2)
I'm pretty dam happy right now... I don't think I will do the vmod.
This is good enough! (fingers crossed behind back, thinking of conductive paint & a Zalman 9500LED HSF).
As...