This has happened since yesterday morning. I hear this buzzing coming from the CPU fan and it sounds like a hair buzzer or something. At first, the noise would be intermittent, it would go away every couple of minutes and then restart again. Now, since last night, it's been constant. I shut down the computer last night so I wouldn't have to sleep with the noise.
For about 5-10 minutes after turning the computer on, it sounds fine, but then it goes into this noise. I've kept HWMonitor open during the entire time, and I don't see anything that stands out. The temperature of the CPU remains at a constant 28-30°, while the RPM slowly goes up into the 900s. There doesn't seem to be any threshold of when the buzzing noise starts.
I've made sure to clean all of the blades on the fan, and made sure that the wire connecting to the motherboard isn't touching anything, but that hasn't helped. Looking into the case, the fan does seem to move a little bit when it starts buzzing, but I don't know if that's normal or not.
I've had this CPU fan for pretty much exactly a year (built this PC at this time last year), so is the thing just shot already?
Edited by Tim Brastow, 11 June 2014 - 06:30 PM.