I recently changed my P4 1.8GHz 400MHz FSB to 2.4GHz 533MHz FSB on an MSI 6566E mainboard. There is a heatsink but no active cooling on the northbridge. OC'd it to around 2.8GHz when I saw an "AGP Failure" warning and then it crashed. System wouldn't reboot until I replaced the original CPU (I am posting on it right now). Checked under the heatsink for the northbridge and it looks pretty cooked (black and blue - it must've gotten pretty hot). What do y'all think - get a new board with better cooling or is it something with the cpu???