my Athlon XP 2400+ is locked . i got it OC @ 2162.6 mhz 166x13 w/ retail HSF. can i unlock it to get lower multip x than tha x13 ? im stuck here . its stable 10 hrs of Prime95. my vcore 1.66-1.73 my ram is DDR266 generic running at 332.6 mhz. tha system runs fine but if i notch tha fsb up anymore then it wont reboot .