Question Is my PSU is failing and need a replacement?

Jul 16, 2022
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I own a Corsair CX750M, working with 4770k and 380x. I experience a lot of kernel power 41 errors lately when I play some of the games. Sometimes my PC turns off like 5 times a day, sometimes I can play without any problems for month or so. Windows logs are empty with zero (0x0) values. View: https://i.imgur.com/K59IbFU.png


I tried many different things in past months to find and/or solve the problem. I ran many different tests like prime95, linpack, 3dmark to find if any of other components are failing or PSU turns off when load gets too heavy. But even linpackExtreme doesn't make my PC fail as some games do.

Today I disassemled PSU, cleaned it and checked for any sign of broken components, everything is looking fine to my eye, nothing is leaking, nothing is burned or cracked, all cables are intact.

I have a feeling that temperature sensor(s) are broken inside a PSU, and it disables on it's own. HWiNFO gives me weird data from both AUXTIN sensors (I assume it's PSU ones). It shows values between 20-125C at a random intervals when PC is in idle. Those readings couldn't be true, because it would've burned long time ago under load. Anything else related to PSU is absolutely normal, 12V snows almost perfect values, 12.06 idle and 11.96 linpack load. Any other voltage is in a good range aswell, temperatures of any other complonents like CPU/VRM/GPU/MEM are fine. On other hand even when PSU temp reads 125C pc keeps working, unless I play certain games, then crash can occur under certain conditions, which are predictable, and those conditions are far from heavy load. As example I play The Cycle, I never experience crash during game, but I often crash when I sit in lobby, which is less stressful for PC. Locking FPS to 30 (to reduce consumption) in lobby didn't solve a thing. On other hand I never ever get a single crash in CoD battleroyale despite it being more consuming than The Cycle.

View: https://i.imgur.com/wAVpazS.png

View: https://i.imgur.com/l4aCXQd.png


It's absolutely clear that PSU needs a replacement asap, or it can be anything else that gives me a KernelPower41 error?
 

DSzymborski

Titan
Moderator
Kernel Power 41 isn't a specific error; it just means that something caused the PC to turn off suddenly and unexpectedly.

No temperatures on the PSU can be read in Windows. You need a high-end PSU with digital capability for that. Nore does software do a good job measuring voltages.

It could be the PSU failing, but it could also be the GPU failing; that one ran hot, used a ton of power, and the whole 7970/280X/380X lineage was known for dying.

As for the PSU, the older it is, the more likely it is. Especially if it's old enough to be one of the far inferior green-label Corsair CX PSUs rather than the gray-label ones.
 
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IBeats

Reputable
Aug 22, 2019
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I own a Corsair CX750M, working with 4770k and 380x. I experience a lot of kernel power 41 errors lately when I play some of the games. Sometimes my PC turns off like 5 times a day, sometimes I can play without any problems for month or so. Windows logs are empty with zero (0x0) values. View: https://i.imgur.com/K59IbFU.png


I tried many different things in past months to find and/or solve the problem. I ran many different tests like prime95, linpack, 3dmark to find if any of other components are failing or PSU turns off when load gets too heavy. But even linpackExtreme doesn't make my PC fail as some games do.

Today I disassemled PSU, cleaned it and checked for any sign of broken components, everything is looking fine to my eye, nothing is leaking, nothing is burned or cracked, all cables are intact.

I have a feeling that temperature sensor(s) are broken inside a PSU, and it disables on it's own. HWiNFO gives me weird data from both AUXTIN sensors (I assume it's PSU ones). It shows values between 20-125C at a random intervals when PC is in idle. Those readings couldn't be true, because it would've burned long time ago under load. Anything else related to PSU is absolutely normal, 12V snows almost perfect values, 12.06 idle and 11.96 linpack load. Any other voltage is in a good range aswell, temperatures of any other complonents like CPU/VRM/GPU/MEM are fine. On other hand even when PSU temp reads 125C pc keeps working, unless I play certain games, then crash can occur under certain conditions, which are predictable, and those conditions are far from heavy load. As example I play The Cycle, I never experience crash during game, but I often crash when I sit in lobby, which is less stressful for PC. Locking FPS to 30 (to reduce consumption) in lobby didn't solve a thing. On other hand I never ever get a single crash in CoD battleroyale despite it being more consuming than The Cycle.

View: https://i.imgur.com/wAVpazS.png

View: https://i.imgur.com/l4aCXQd.png


It's absolutely clear that PSU needs a replacement asap, or it can be anything else that gives me a KernelPower41 error?
Is fast boot enabled? if so try disabling it in bios to see if it fixes it.
 
Jul 16, 2022
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10
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It could be the PSU failing, but it could also be the GPU failing; that one ran hot, used a ton of power, and the whole 7970/280X/380X lineage was known for dying.
Can GPU failing lead to empty logs and such crash? Shouldn't driver stop working first or windows give me blue screen?
As for the PSU, the older it is, the more likely it is. Especially if it's old enough to be one of the far inferior green-label Corsair CX PSUs rather than the gray-label ones.
I have one with green labels.
Is fast boot enabled? if so try disabling it in bios to see if it fixes it.
It is, I will try to disable and see if it's working.
 
Jul 16, 2022
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No, it should be called fast boot. try looking for it in the boot section, also you should list all your specs.
View: https://i.imgur.com/8oxM9V5.jpg

No such thing in here. I found win8/8.1 fast boot features, but they are disabled for obvious reasons.

Specs are:
i7-4770k @4.2GHz
MSI Z87-GD65 Gaming
PowerColor R9 380x
HyperX Predator KHX2400C11D3/4gx (8gb) + A-Data DDR3 2800 2OZ (8gb). Both running on 2400 with HyperX timings, 27 hours of Prime95, no errors.
Corsair CX750M
 

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