My brother is running an old AMD K6-2 300MHZ cpu. It runs on a 66MHZ bus. Looking on the specs of his motherboard he has a overclocking capability of either 75MHZ or 83MHZ. His clock multiplier goes to only x4.5 I tried setting the bus speed to 83MHZ and a x4.0 multiplier to get 333MHZ and running at 83 bus. The system booted fine but when windows started loading it gave me windows protection need to restart the system with same results. Same thing when setting the cpu to x4.5 and 75MHZ. I thought this cpu could be overclocked or am I doing something wrong. Any response would be appreciated.