Question My PC restarts by itself, no BSOD ?

[SceneShiffer]

Well i have a problem for a couple of months, as the title says my pc restarts randomly and i don't know exactly the problem, and it's not everytime, there are periods that i can play 2 hours straight, days or even weeks with no restarts and then they came back, like playing Overwatch 2 like 3 or 4 matches and then restarts and it becomes really frustrating

I checked my temps, they are at 70° in max usage, considering now that is summer where i live, i don't think thats the problem, but maybe...
I downloaded Occt, and i ran Cpu stress test and memory and it didn't crash on those.
But when i run Gpu stress test, at the milisecond i press start, it restarts the pc, but there is another thing, sometimes i can run the test fine, without resets, even with the card at 85°, as well on the amd software stress test, so i dont know what is the problem
I checked everyting, even disconnected the power buttons, restart, etc of the case, changed the pci e wire to another plug, its a modular psu, so i don't know if my gpu is dying or the psu is dying


My specs are

Cpu: Amd Ryzen 5 1600
Gpu: Gigabite Radeon Rx 560
Motherboard: Asus a320 m-k
2 dimms of 8gb each one, both kingston hyperx but one is fury with rgb, and they have different speed, one is 2400 and the other could reach if im not wrong 3000mhz, (can that difference be the problem?)
Psu: Sentey Metal Blade 650w 80 plus bronze (my highest chances of the problem maybe this)

The pc almost everything have like 4 or 5 years of use
I can't spare a new psu at the moment to try if its that, i accept suggestions on it, so i need confidence amd suggestions on what may be the problem, and hope you understand me well, english is not my main language, thanks

 

[drivinfast247]

That PSU has got to go first and foremost.

Then that RAM will need to be looked at.

 

[pctech2005]

Perhaps it is a faulty reset switch. try disconnecting the header from the mother board and see if that helps.

 

[SceneShiffer]

Perhaps it is a faulty reset switch. try disconnecting the header from the mother board and see if that helps.

That its all disconnected, reset swith, power button, speaker, leds

 

[SceneShiffer]

That PSU has got to go first and foremost.

Then that RAM will need to be looked at.

Im gonna see if i can aquire a new psu, i have another generic but it doesn't have pci express cable, i had in mind use that with mobo and the rest of components and use the modular for the gpu only to see what happens but im in doubt about if that will work

 

[DSzymborski]

Im gonna see if i can aquire a new psu, i have another generic but it doesn't have pci express cable, i had in mind use that with mobo and the rest of components and use the modular for the gpu only to see what happens but im in doubt about if that will work

Don't do that. You're trying to a chase down a problem that can be multiple things; don't bring in a janky power setup with junk equipment to possibly make everything worse.

 

[drivinfast247]

Im gonna see if i can aquire a new psu, i have another generic but it doesn't have pci express cable, i had in mind use that with mobo and the rest of components and use the modular for the gpu only to see what happens but im in doubt about if that will work

DO NOT use any cables except what comes with the PSU.