@Leeghoofd

about your advice on this bios setting...

CPU GTL Voltage Reference (0/2): AUTO
CPU GTL Voltage Reference (1/3): AUTO

i'm wondering that you guys don't have any problem at all with the setting on auto?
this due to myself have been using 2 P5Q-Ds and also known from friends for another 5-6 P5Q-Ds boards
i can't almost do anything overclock if i set that to auto, for quite a while that the systems not even stable at stock clock speeds without manually setting the GTL_ref.
i may have had recieved the worst batch of bios and boards from asus.