I built a machine for a friend (PII 300) that is having an unussual heat problem. It uses software/Hardware system monitoring IE: system fan speed, cpu temp, voltage monitoring ect. The cpu heat goes to max in about an hour (120f) and I don't know why. He has a cpu fan , a case fan, and a fan in the power supply. He is in a dirty environment however. Could this be the cause or am I missing something? Thanks... Marc Marc Montminy [log in to unmask] The PCBUILD web site always needs good submissions. If you would like to contribute to the website, send any hardware tech tips or hardware reviews to: [log in to unmask]