New
#11
One clue as to needing cleaning is the noise produced by the fans as the heat builds up. I have one computer with a finned heatsink that starts a whine went it's getting plugged up, time to clean. I'm a bit sensitive to high-pitched sound, used to have Western Union/Teletype machines about 4 feet behind me at work and knew when the bearings in them needed servicing before the technicians did.