Member Avatar for Albert Pinto

Hi Sir,
Whenever I start my PC, SMPS fan makes lot of noise.......But after 5 minutes there is no such sound and everything functions perfectly.........Is there some problem in the SMPS, I mean, is it needed to be replaced........? Is it a major problem....?
Please Help.........Thanks.....

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  • Latest Post Latest Post by Maplestory

Dani AI

Generated

Quick expert note for in light of the replies from , and .

A fan that is loud only for the first few minutes and then quiets commonly points to either a mechanical issue (stiff or worn bearings, hub/bushing contact) or a temperature‑dependent electrical resonance (transformer/coil whine or motor vibration). Mechanical problems typically sound like grinding, scraping, or rough rumble; electrical resonance is a high‑pitched, tonal whine that can change with load and temperature.

Safe, practical checks to narrow it down: with mains power removed, remove the case side panel and inspect the PSU fan for axial/radial play; gently spin the blades by hand to feel for rough spots or rubbing (power off). Reassemble, boot with the panel off and listen to confirm whether the noise clearly comes from the PSU rather than another fan. Do not open the PSU enclosure — internal capacitors can remain charged and are dangerous.

Decision guidance: if inspection shows wobble, roughness, or scraping, the fan bearing is failing and the PSU should be serviced by a professional or replaced (replacement is usually the safest option). If the sound is a brief tonal whine and there are no voltage issues, smells, or shutdowns, monitoring is reasonable but plan replacement if it worsens. For replacement, choose a reputable, efficiently rated unit (80 Plus Bronze/Gold or better) from established manufacturers and prefer longer warranties and quality bearings (ball or fluid dynamic) for longevity.

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Member Avatar for mechbas

Clean fan.

Member Avatar for 07knev

Might be dust on the fan creating a sound, use airblower and blow it off

Member Avatar for Maplestory

It Is Either Your Fan Is Dirty Or Have Dust On It.. Your Fan Should Not Be Making So Much Noise.. How Long Is Your COmputer?

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