this post was submitted on 31 Dec 2023
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PSU fan runs at full speed (self.buildapc)
submitted 11 months ago by fahad to c/buildapc
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I have just built my first home server; after the first boot, the PSU fan runs at full speed. I couldn’t figure out what the issue was. Any suggestions would be appreciated.

Specs:

  • 16GB DDR4 RAM
  • Seagate IronWolf Pro 2x 4TB
  • 1TB nvme Samsung 970 evo plus
  • Gigabyte H610M S2H V2 Intel H610 LGA1200 DDR4 Micro-ATX Motherboard
  • DeepCool GAMMAXX GT CPU Cooler A-RGB 120mm PWM Addressable RGB LED Fan Intel AMD
  • 750W EVGA Power Supply Unit / PSU VAT INC
  • Intel core i5-12400t QS 6c/12t Support ASUS ROG Strix B660-I Gaming WiFi LGA1700.
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[–] fuckwit_mcbumcrumble 8 points 11 months ago (1 children)

Are there any switches on the psu itself? Whats the exact model of power supply? "750W EVGA" tells us almost nothing.

[–] fahad 3 points 11 months ago* (last edited 11 months ago) (2 children)

RMx Series™ RM750x — 750 Watt 80 PLUS Gold Fully Modular ATX PSU (UK)

[–] [email protected] 3 points 11 months ago* (last edited 11 months ago)

See also this: https://www.reddit.com/r/Corsair/comments/kt81io/corsair_rm750x_fan_spinning_at_idle_half_of_the/

Link to Reddit sadly, but more people seem to have "this issue". If you also have a GPU in there, you might just be taking too much from the PSU to idle.

[–] ultranaut 2 points 11 months ago

Does it actually post and boot?

[–] [email protected] 2 points 11 months ago

An exact PSU model would help tremendously, afaik only high end ones have variable fan speed, for example my cheap Thermaltake's fans spin at constant rate