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PSU fan does not spin down until restart

Frick

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Ok, so recently I got meself a "new" GPU - a Geforce GTX 550Ti. It was cheap, and I think the fan is dying as it's super loud even at low speeds. But I can keep the fan at a reasonble noise level while the GPU doesn't get too hot. So now it's not very loud (and I've got an AC Accelero S1 incoming so whatever). But now I have noticed another irritating thing: The PSU fan goes up (which isn't that surprising), but it does not go back to normal until I restart the computer.

Any ideas?

A small review can be found here.

A new PSU is out of the question at the moment. I am comfortable with tinkering with it, and I'm decent with a soldering iron.
 
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This only started after you swapped video cards?,check in gpu-z if the card switches to 2D mode after load.
 

Frick

Fishfaced Nincompoop
Joined
Feb 27, 2006
Messages
18,934 (2.85/day)
Location
Piteå
System Name Black MC in Tokyo
Processor Ryzen 5 5600
Motherboard Asrock B450M-HDV
Cooling Be Quiet! Pure Rock 2
Memory 2 x 16GB Kingston Fury 3400mhz
Video Card(s) XFX 6950XT Speedster MERC 319
Storage Kingston A400 240GB | WD Black SN750 2TB |WD Blue 1TB x 2 | Toshiba P300 2TB | Seagate Expansion 8TB
Display(s) Samsung U32J590U 4K + BenQ GL2450HT 1080p
Case Fractal Design Define R4
Audio Device(s) Line6 UX1 + some headphones, Nektar SE61 keyboard
Power Supply Corsair RM850x v3
Mouse Logitech G602
Keyboard Cherry MX Board 1.0 TKL Brown
VR HMD Acer Mixed Reality Headset
Software Windows 10 Pro
Benchmark Scores Rimworld 4K ready!
This only started after you swapped video cards?,check in gpu-z if the card switches to 2D mode after load.

I don't know, I only had a HD 2400 Pro before. I mean the PSU didn't exactly got loaded with anything..

EDIT: The GPU clocks down as it should.
 
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