I have a system that i've homebuilt, (its in the photos section but i think thats down) anyways, i recently upgraded to a AMD Athlon 2500 xp, my mobo is a kt4v-l from MSI (tech support sucks there) and i got a gig of DDR. Anyways, im using the new subzero 4g peltier cooling kit from Thermaltake but the real issue is that i can't set the fsb on the mobo higher than 150mhz. if i do the system shuts down. i know the heatsink is installed correctly, as is everything else, and i have updated the bios to the most recent one so what could be causing this. im looking for as much help as possible, thank you!