Asus doesn't advertise the P5B Premium as a strong overclocker, but from our experience, Asus motherboards do overclock and most times, very well. The BIOS includes all the required options to boost the CPU's overall speed, either by increasing the FSB or RAM frequencies. Ok, so this motherboard can overclock. The real question is, how high can it go.
First attempt is to keep CPU multiplier locked (x9) and try to raise the FSB. Our best attempts reached 335MHz FSB, rather low, since the Commando and EVGA 680i LT can very easily reach 350+MHz.
Next attempt, we lowered the internal CPU multiplier and tried for the maximum possible FSB frequency. Without making any special preparations and leaving all voltages at auto mode, we managed to get a 100% stable 470FSB with memory running 1:1.
That was very good performance! The Asus Commando with exactly the same components reached 480FSB. Perhaps, with a different CPU, such as the Intel E6300, you can get more FSB "juice" from this motherboard.