why do I hear that you can unlock multipliers on the regular processors? To put it simply, you can't, not even using mods. Its impossible. The multipliers on C2Ds are only unlocked down to 6. The C2Extremes are fully unlocked up and down. There is only a FSB mod for the C2D that pushes it to 333mhz. The last processor to be able to mod the multi are Athlon XPs. And the mobile versions of those featured an unlocked multiplier.