I have xp 1700 and 1900 processors. I have an msi K7T266 Pro2-RU (MS-6380) motherboard. I'm using pc 2100 ddr ram. Whenever i turn the front side bus on the chip to 133 (where it should be) it won't boot. I've tried different ram and motherboards. both chips have this problem. i've tried different heatsink fan combos as well as different power supplies. the chips run fine with the bus at 100. because of this the chips run at 1100 and 1200 instead of 1533 and 1600. can anyone help me with this ? thanks