The XP1600 coupled with a good motherboard such as the Asus A7V266-E, results in a very 'overclockable' sub-system. Im almost 100% positive that the FSB overclocking experiment was not fulfilled by the CPU reaching it's maximum, but by the other components such as the RAM or AGP card reaching theirs. If I had the resources, the patience and the confidence to successfully unlock the multiplier then without a doubt I could of obtained a much higher CPU speed in conjunction with raising the voltage level.