I own a MSI Kt3 Ultra3 motherboard and 512 2700 memory. I have a Athlon XP 1800+ overclocked to 150 x 11.5. When I try to go up to 155 x 11.5 the graphics start crapping out when im booting XP and errors keep poppin up. So i raised the voltage to the CPU and Memory and the errors are still there. Is this the extent of the motherboards OC'ing??? Oh yea I put the memory on most conservative timings while trying this also.