CPU fan speed fluctuation normal?

[Outlander]

Hi, sometimes, especially when the compu is working under a heavy load, there is a distinct noise from the CPU, of the fan speed having increased. This noise is really loud, and it almost seems like the whole thing might burst or something. If it was a small fluctuation, it would be alright, but like I said, sometimes it sounds like a vacuum cleaner. Is it normal, and does it happen to all?I am worried especially since now its summer, and I think it might be that the fan speed is increasing to cool the processor. I have a P4 3.0 GHz, 1 GB RAM (876 MB, shared with onboard graphics card). I am thinking maybe it would be better not to use the compu during the daytime.Any suggestions?Thanx.

 

[atuldd]

check ur power supply or wires ......