if you have not bought this CPU yet make sure you buy the retail version not OEM. agex000 i think what he meant was that your:
CPU frequency: 200Mhz (400mhz effective FSB)
CPU multiplier: (i think is 11, not absolutely sure)
Memory FSB: 200Mhz (400mhz effective FSB)
these are the settings for a 32bit athlon XP3200 though. i do not know if this is the same for your 64bit. someone has to double check this before you try it. if it does not get recognise is the only time you need to set it in BIOS. if windows detects it OK than do not touch anything.
people are overclocking this pretty good: