fsb

when i set my fsb to anything higher than 150 it causes 3dmark to crash, one minute im benchmarking, then next second im back at my desktop, now i have run games for hours with 152 fsb to see if its the chip overheating, but nothin goes wrong, its only in 3dmark, anyone know why that could be ?

I would think it's cause 3dmark is designed to push your card to it's limits where your games might not be and it's exposing instability with the speed your AGP slot is running at.