I tried overclocking my PII400 to 500MHz, but nothing happened, my system still booted up at 400MHz. I tried to underclock it to 350MHz, but I only got 400MHz. What would be stopping me from setting the frequency any higher? My manual says that I can actually set up the board to run at a maximum of 133MHz with a multiplier of 9.5! That works out to be about 1260MHz, but I can't even get the thing to read anything but what the processor is. Help?