I think the fans in these PC's are temperature controlled. Check that the CPU heatsink & fan are free from dust / fluff also any case mounted fans etc.
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HP D530 very loud fan noise
I have two HP D530 business class desktop PC's, both have worked fine for over a year, but one has a loud whirring fan noise that pops up every 10 minutes or so, sounds like a jet plane taking off. The other one never does it. Neither PC has any issues other than the very annoying fan noise. Any ideas?
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Answers
monitor the cpu and disk temps (northbridge can be interesting too - if possible) with speedfan :
http://www.almico.com/spee
if too high for cpu, reapply heatpaste, or get a better cooler.
in some cases, a bios upgrade helps too
I have a few of these machines- Its the CPU loading up (antivirus, another task in background) to 100% and the mobo bios automaticly spins up the fan- the fan after yearrs of use, the bearings will wear and gets much louder over time-
Make shure its spotless in and around the fan and heatsink. taking the fan off to blow it out is not overkill-
if you would like it quieter you will need to find a low-profile heatsink fan combo that will work- something with a standard 80mm ball bering fan is a good idea-
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by: blackfox_01Posted on 2009-01-13 at 13:27:14ID: 23367456
That sounds like the high speed cooling fans are just kicking into gear to keep it cool. You may have an issue with a component getting too hot or a sensor going bad.