Based on AMD K8 platform structure, when you change CPU FSB speed, DDR and Hyper Transport clock are also be affected. To raise CPU FSB speed, DDR and Hyper Transport clock are also raised. If computer hang up in this condition, you could try to decrease DDR and Hyper Transport clock. Please kindly pay attention, to raise CPU FSB clock does not fit specification defined by CPU vender, and we do not responsible for any results from overclock.