Is it reasonable to replace a working PSU just to reduce PC noise?
Asked by
MellowCedar42
My ASUS 750W power supply is easily the loudest component in my PC. The system uses an RTX 5070 Ti and Ryzen 7 5800X, with a 2x140mm AIO and a custom 3D-printed GPU shroud to keep overall noise down. Under heavier loads—around 300W from the GPU and 140W from the CPU—the PSU fan becomes especially loud, and it is still noticeable at idle. I use open-back headphones, so the grinding or fan noise is hard to ignore. Would spending roughly €100–€120 on a quieter, possibly higher-wattage PSU be wasteful if the current unit is otherwise working properly? I would also appreciate recommendations for quiet models.
Answers
Before buying anything, make absolutely sure the PSU is the actual source rather than a case fan, GPU fan, or coil whine. Also check whether the PSU has a fan-stop switch and confirm that it is mounted so it can draw cool air. If it has no fan-stop feature and remains loud at idle after testing, replacement is a sensible solution.
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If the PSU is genuinely the source of the noise and it bothers you every time you use the computer, replacing it is completely reasonable. A quiet PC is worth paying for, and you could sell the old unit rather than simply throwing it away. Just compare independent noise measurements and reviews before buying.
MellowCedar42: That was the sanity check I needed. I mainly didn’t want to replace a perfectly functional component, but I’ll probably upgrade it.
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Replacing the PSU is not excessive when it is the loudest part of an otherwise quiet build. Choose a reputable unit with enough headroom, good protections, and verified acoustic performance. A higher-wattage model can help, but don’t assume a larger capacity automatically means quieter operation.
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Look for a model with a semi-passive or fan-stop mode, a strong efficiency rating, and good acoustic testing. Cybenetics noise ratings can be useful for comparisons. Examples worth researching include the be quiet! Pure Power 13, MSI A-G or A-GLS models, and the ASRock Steel Legend series. A 850W or 1000W unit may also run its fan more slowly under the same load, though quality and noise testing matter more than wattage alone.
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I would avoid modifying the PSU fan unless you are fully qualified to work around high-voltage electronics. Opening a PSU can be dangerous even after it has been unplugged, and an incorrect fan replacement or control setup could damage the unit or other hardware. Buying a quieter, well-reviewed replacement is much safer.
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MellowCedar42: I tested the other components and the PSU is definitely the source. Unfortunately, this model doesn’t have a fan-stop feature.