I've actually tried all of those things. Reseating doesn't work, I got new heatsinks and made sure to get good coverage with thermal paste.I even tried different RAM. Running a CPU intensive task might be it, because I did try a short run of a few hours with nothing running and it didnt seem to cause a problem. Perhaps I should see what I can do about getting better cooling. -A.P. Etc _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com