yes you can. go into cmos setup and in the advanced chipset options and change the XP2500's "CPU external frequency" from its defaulted 166mhz to 200mhz. presto you now have a XP3200 for 84-92 $$'s
if all you want to do is raise the front side buss from 333mhz to 400mhz than this is the settings: CPU external frequency to 200mhz and multiplier to 9. you will end up with a XP2500 still but now on a 400mhz bus whooo!
please go here for more detailed advice on overclocking:
