I know that most noise from a computer is produced by the fan at the PSU, but I was wondering if there was any way to make it quieter? would greasing it work? I unfortunately cannot afford a new one, so any suggestions would be appreciated. Thanks
Come from the fan motor or the blades cutting air.
If the motor - then the very careful application of graphite to the bearings may well solve the problem.
If the blades have become dirty - the leading edge frequently picks up dust - it becomes thicker and therefor noisier - a Cotton bud with a little meths should help - a very fiddly but quite cheap operation.
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