My CPU fan started making a screeching noise at times and I replaced it. It's doing the same thing with the new fan. It seems that the fan is speeding up and slowing down. I bought a new heatsink with the fan so it's not dirty. Could it possibly be a problem with my power supply. Any help would be appreciated.
Athlon 64
ATI Radeon 9600
Athlon 64
ATI Radeon 9600
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