Question PC randomly shuts down without BSOD and regardless of load ?

[n3v3rwint3r]

The essence of the problem: At any moment, regardless of the load on the PSU, the PC turns off without BSODs, until you drop the residual voltage, you can't turn it back on, the reasons for such abnormal behavior are still unclear, this has not been observed before.

The peak consumption on the Watt meter was a maximum of 507 watts one time over 3 years, with a PSU power of 1000 watts and taking into account the total consumption of the system, there is a good power reserve, I doubt that the problem is in the PSU, + 5V + 3.3V + 12V are normal, any stress tests and benchmarks pass without problems (Superposition, OCCT, 3D Mark, Fur Mark, etc.), the PSU itself has been serviced, as has the PC as a whole.

The computer can turn off both under load and without it, I blame the MS updates, lately they are not famous for their stability and I slightly assume that it could be the power supply, although it is very unlikely, I am attaching the eventvwr logs.

OS: Windows 11 Pro license [24H2] (build 26100.3037), latest update KB5050094 (02/06/2025).

Hardware:
Motherboard = ASUS TUF GAMING B550-PLUS WIFI II (BIOS v. 3611, the latest version at the time of creating the topic)
Processor = AMD Ryzen 7 5700X [AM4]
RAM = 32 Gb, ADATA Gammix [AX4U320016G16A-DTBKD] (2 x 16 Gb, XMP-3200)
Video card = ASUS TUF GeForce RTX 3080 [10 Gb] (driver NV 572.16)
Power supply = Corsair RM1000x (1000 W)
SSD NVMe drives = XPG GAMMIX S11 Pro 512 Gb and KINGSTON SNV2S500G 512 Gb

P.S. there is no pattern to what is happening, both in time and in terms of system load, it is not clear where to think. The power supply tester is available, the multimeter is also available, in general, the necessary tools are available if necessary. Does anyone have any thoughts? Thanks in advance.

 

[helpstar]

run ubuntu and check if it happens there too

reset BIOS by jumper

try a different PSU
test components in a different system

 

[Misgar]

I doubt that the problem is in the PSU, + 5V + 3.3V + 12V

The power supply tester is available, the multimeter is also available,

A "proper" power supply tester comprises digital loads and other equipment. A multimeter will merely show if you have a DC rail outside the ATX spec. I'd probably check all the rails with a storage 'scope, to measure the ripple voltage. It can indicate a failing capacitor on the secondary side. Much easier just to swap the PSU on a temporary basis.

RAM = 32 Gb, ADATA Gammix [AX4U320016G16A-DTBKD] (2 x 16 Gb, XMP-3200)

If you're running the RAM at DDR4-3200 (which is the maximum recommended by AMD for the 5700X) try switching off the XMP overclock and revert to the JEDEC default 2133 or 2400MT/s.

In addition, have you run a full pass of MemTest86 on your RAM? Even one error could be the reason for the crashes.
https://www.memtest86.com/

P.S. there is no periodicity of what is happening, both in time and in terms of system load,

What programs are running when the system hangs, or is it purely random? I used to get crashes with Topaz Video AI until they updated the program.

I blame the MS updates, lately they are not famous for their stability

Admittedly you're running Windows 11 and I'm still on 10, but I've not had any problems with multiple PCs and Windows Updates for several years. Perhaps 10 is stuck in an update time vortex? I could haul out a Hyper-V Windows 11 VM and test.

After checking hardware, I normally fit a cheap SATA SSD and perform a fresh install of Windows, Takes around 15 minutes from booting a USB memory stick containing a Windows ISO to the Desktop screen. Another 2 hours to configure Windows + programs, then run stability tests with the new (clean) OS.

 

[n3v3rwint3r]

Another 2 hours to configure Windows + programs, then run stability tests with the new (clean) OS.

Thank you for your assistance, as a result, the problem turned out to be in the power supply, replaced it with exactly the same Corsair RM 1000x. MemTest = Pass. Apparently the power supply did not hold the load or, on the contrary, there was not enough power on one of the lines, I do not have an oscilloscope, so I could not check everything primary and secondary in the unit, so far the "flight" is normal on another power supply, in any case, I will continue checking, I hope that nothing else comes out. Good health <3

 

[n3v3rwint3r]

Much easier just to swap the PSU on a temporary basis.

Once there were power surges, perhaps this affected the performance of the power supply, it continued to work, but in the course of a short period of time it "degraded" somewhere on the board, maybe capacitors or resistors, I'm not exactly sure... At first there were one-time problems, then the power supply began to turn off more and more often. For the future, what could it be? Which component in the power supply is responsible for loads or stable current supply?

 

[n3v3rwint3r]

try a different PSU

Thank you also, the problem was in the power supply, which I of course understood, but I wanted to be completely sure of it. Good health <3