PC rebooting without any error / blue screen

[Marius01234]

Hey! (do we say hello in these forums?)

My PC is restarting arbitrarily without any kind of error nor blue screen. It just shuts down and boots back up. It is maybe important to say that while this is happening the fans turn off but the LED keep being lit, so it apparently doesn't lose completely power. This happened a few times while I compiled some code and while playing LoL. It has never done that and started spontaneously 3 days ago. I updated my drivers but that didn't help. I suspected a defect PSU, but running Cinebench hasn't crushed my PC. What I did learn from that though is that my CPU is underperforming by a lot. My Ryzen 5 3600 should have a score of over 9000 with multicores but has only a score of 4962. My singlecore CPU score is also quite lower at 862 (instead of 1288). I haven't overclocked anything. My CPU temperature is always >90C, which would indicate a defect cooling system? I don't know how to proceed or what to check, is maybe the CPU the problem? Attached are my specs and the HWMonitor monitoring while cinebenching.

Okay my PC just crashed while writing this post, the CPU was idling (no heavy load at least). I managed to save the HWMonitor report 5seconds before the crash, maybe that will be of help...

OpenHardwareMonitor.Report.txt specs.txt

[MingLee420]

9 minutes ago, Marius01234 said:

Hey! (do we say hello in these forums?)

My PC is restarting arbitrarily without any kind of error nor blue screen. It just shuts down and boots back up. It is maybe important to say that while this is happening the fans turn off but the LED keep being lit, so it apparently doesn't lose completely power. This happened a few times while I compiled some code and while playing LoL. It has never done that and started spontaneously 3 days ago. I updated my drivers but that didn't help. I suspected a defect PSU, but running Cinebench hasn't crushed my PC. What I did learn from that though is that my CPU is underperforming by a lot. My Ryzen 5 3600 should have a score of over 9000 with multicores but has only a score of 4962. My singlecore CPU score is also quite lower at 862 (instead of 1288). I haven't overclocked anything. My CPU temperature is always >90C, which would indicate a defect cooling system? I don't know how to proceed or what to check, is maybe the CPU the problem? Attached are my specs and the HWMonitor monitoring while cinebenching.

Okay my PC just crashed while writing this post, the CPU was idling (no heavy load at least). I managed to save the HWMonitor report 5seconds before the crash, maybe that will be of help...

OpenHardwareMonitor.Report.txt 58 kB · 0 downloads specs.txt 205 B · 0 downloads

It might be the psu tripping? Although the specs seem like it would stay under 300w so maybe the problem is the psu

[Marius01234]

3 minutes ago, MingLee420 said:

It might be the psu tripping? Although the specs seem like it would stay under 300w so maybe the problem is the psu

I'll have to try another PSU, Ithink I have an old one laying around. Would a defective PSU explain why my CPU is always at >90C though? Or are these 2 problems not connected?

[Dedayog]

13 minutes ago, Marius01234 said:

I'll have to try another PSU, Ithink I have an old one laying around. Would a defective PSU explain why my CPU is always at >90C though? Or are these 2 problems not connected?

CPU over 90c is a problem, for sure.  May be related.  Usually something causes the PSU to trip.   Like a GPU voltage modulator fault for example.

 

I think it's rare for a PSU to just start tripping, something else is the problem I would wager.

[Marius01234]

18 minutes ago, Dedayog said:

CPU over 90c is a problem, for sure.  May be related.  Usually something causes the PSU to trip.   Like a GPU voltage modulator fault for example.

 

I think it's rare for a PSU to just start tripping, something else is the problem I would wager.

What would be the best approach to try to identify the problem?