I had my old Thunderbird (1.2GHz) running in an MSI KT3 Ultra for about a month mildly overclocked (1.36GHz), then I loaded the performance defaults and my system wouldn't post. I tried clearing the CMOS and still nothing. And there's an LED arrangement on the back panel that lights up in certain patterns to diagnose a problem, and sure enough four red lights were illuminated which supposedly means it's a cpu that isn't seated correctly or a damaged one. I'm assuming that it's damaged. But.. what are the chances of that frying it? It normally ran at 44C under load and 40C idle while it was overclocked. Oh well, I guess I'll try RMAing it cause it was a retail box w/ a 3 year warranty. I bought it in May of 2001 and used to run it at 1.42GHz on an AMD761 chipset w/ the performance defaults on. I guess the MSI board was too much for it.