depends on the memory, some will, some won't
i have kingston hyperx ddr400 2-2-2-5 and i can OC it to ddr533 3-3-3-6
actually, a little higher
though, i don't know how much performance you would see out of doing that anyways
Mindless, thanks for the very informative reply. Unfortunately, my mobo died in the interim and the machine is too obsolete to save.