Took this motherboard and cpu and put it in another case from upgrading another system. Runs fine when at 100 fsb but when set to 133 fsb it may or may not go into windows and if it does it will freeze up. Tried many settings in bios so do not believe in bios. Has a video card that worked with this MB, tried different ram, has a amd OK power supply, MB is a MSI k7t266 Pro 2. The OS is xp pro. Any ideas would be appreciated thanks.