PC Processors

[Flubbalo]

I recently upgraded to a Ryzen 9 9900X. It's been a phenomenal processor barring one weird quirk. Under random, though usually more multiprocessor heavy work loads, my computer will sometimes abruptly shut off. I think overheating but keeping an eye on temperatures hasn't proven that.

What I can say for certain is that I can't turn the computer back on without turning the PSU off and back on, no matter how long I wait for it to cool assuming it is a heating issue, even though power is still flowing into the machine.

The types of things that tend to cause a shut off are pre rendering shaders for games (I'm on Linux, ((Mint Cinnamon)), steam needs to do that before launching games with proton), streaming through discord, moving large amounts of files at once, etc. Usually any one of these by themselves is fine, but the more the CPU is taxed, the more likely a shut off will occur. It's also worth noting that, if I boot my computer back up as soon as I can after a crash, it's usually more likely to crash again right after. 

I've underclocked the speed of my CPU and that feels like it helps but it's very much not a guarantee. I've tweaked my cooling setup multiple times as well with no helpful result. I have an Arctic Liquid Freezer ii 360mm which should be enough to cool this beast but I haven't been able to get any noticeable change in this behavior.

If anybody can offer any advice or tips or fixes I haven't tried yet, I would greatly appreciate it.

[FunkZ]

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@Flubbalo wrote:

Under random, though usually more multiprocessor heavy work loads, my computer will sometimes abruptly shut off. What I can say for certain is that I can't turn the computer back on without turning the PSU off and back on.

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A hard shutdown requiring a power supply reset sounds more like the system is triggering a power supply protection circuit, such as overcurrent.

What are the rest of the system specs?

[Flubbalo · Accepted solution]

This is probably exactly what was happening. I've accidentally stumbled onto the solution, which is another in my saga of dumb problems involving hardware solutions I couldn't quite see (the last involved a defective power button).

I have an EVGA Supernova G5 1000W, which I was actually using in a more power hungry rig before this. Less efficient CPU, more SATA drives, etc.

I could list the rest of my specs but it won't matter since the solution is I somehow accidentally turned the switch for the PSU's eco mode on. I discovered this as I was going to test a lower wattage PSU to see if the behavior still occurred. Disabling eco mode solved my issue. 

I can't find exact information on what exactly Eco mode does, but i believe rather than an overcurrent, it lowers the fan speeds on the PSU and that the PSU might have been overheating. That said, overcurrent is still very possible. Either way, I've accidently found the solution and like half of my pc issues in the last year it's been something really stupid I should've found sooner.

[johnnyenglish]

@FunkZ is on something, tell us your PSU and while at it, every piece of hardware in that system.

You can try 65Watt ECO Mode and disable any form of boosting, it should tame the beast and make it not crash.
Try it, its just troubleshooting.