fsb & multiplier settings for athlon xp

[dubstar]

i want to underclock my 2500xp,.. currently its at 2800xp, and i was wondering if i should lower the multiplier, or the fsb.. i still want it to be fast, and get good times, but i figure, im not really doing anything with the 300mhz, and i probably wont notice an few hundred mhz difference..

 

[Sazar]

leave the fsb and underclock using the multiplier or move fsb to 200mhz and underclock using the multiplier...