How to reduce fan noise on DL380 - Compaq (173907001) for ProLiant DL380 / ML350 / ML370 CPU Fan

PSU or CPU?

Open the case and boot up. There should be a red internal indicator inside as well. That is your true failure.

Just Clear NVRAM (by SW6 maintainance switch )/ else systemboard has to be replaced

Update Proliant Support Pack from hp site .If problem persists Replace it.

bad PSU?

it only ur fan problem which one of the four fan or two ,might be stuck or jammed which starts after of couple of restarts, so i sugest u to check the fans when in operation
good day

Hello

I have a gforce 9600gt oc addition and that fan is loud beyound your wildest expectation, but although there is lots of utillities you can install to reduce fan speed thus reducing the noise, but can cause permanent harm to your system(it will most probably overheat). You can try blowing all the dust of the fan using compressed air to reduce the rolling resistance of the fan. You can find a fan speed utillity with the name of LG X110 fan utility from google, developed by msi, but i wount recomend it. Hope this can help you, please rate this

Best regards

Usually fans make more noise when they're dirty.

Have you tried cleaning the fan with some compressed air?

Replace the fan motor. Sounds like bearings are going bad.

Try to update the firmwares. Maybe the threeshould of the fans are incorrect. A new firmware can correct this problem.

Let me know if this post helps