Hello I have an old P4 1.6 ghz computer with 512 mb of PC2100 ram. Its a matasonic motherboard. I just got a new computer so i can pretty much do whatever i like with this one. I want to try and overclock it just to try and out and learn how to do it. I understand you have to change the bus speed. I went to the BIOS and found the place to do so. But it won't let me hightlight and change the Bus speed from the default 100 mhz. Is it the motherboard? What should i do.