So starting last night, PC Probe started poping up and my power supply fan RPMs were all over the place, going from 2000ish to 4000ish every 5 or 10 seconds with the occassional negative 250,000 rpm. :giddy: I didn't really think much of it because I was running my machine REALLY hard for most of the day so I figured it was just a glitch. So naturally I did a hand test on the fan and it was not reving up and down and it certainly never spun backwards. So I just shut down PC Probe and went about my recording. Well today I was just surfin the web and it happened again. Same dealio so I checked it out again and it was fine, not reving up and down. Kinda just to make me feel better, I decided to increase the speed of my case fans thinking that might buy me the added time I might need in the event the PS fan did die. This is a realtively new Enermax 450W PS. So anyway... once I crossed the threshold of about 4000 RPM with the case fan, the readings for the PS fan totally leveled off. I slowed the case fans back down and the bogus readings came back. Perhaps I've found a little glitch here. Anyway, my case fans are going to stay at 4KRPM.