PC "restarting" suddenly and no visible error code

[stimby]

PC specs

Win 10 pro, 10.0.16229 build 16299

Ryzen 1600 , default clockspeeds

Asus Prime x370 Pro, bios ver. 3803

Corsair Vengeance 2x8gb ddr4 CMU16GX4M2C3200C16R, not overclocked either since the default overclocking profile (DOCP) is not stable for some reason.

ASUS STRIX R9 390 DirectCU III OC, modded cooler (original coolershroud removed properly and 2x120mm fans running from case fan slot)

EVGA SuperNOVA 550 G2, 80+ GOLD 

Alphacool Eisbaer 240 

Phanteks p400s 

2x EVO 850 250gb, 1x pny ssd, 1tb samsung hdd, 500gb wd hdd

 

First I would like to apologize for my "bad" English since, it is not my native language. 

 

So to the problem. For a few weeks now, my pc suddenly has started restarting itself, tho pc wont post after the "restart" is going on. There are no warnings, temps are just fine and Event Viewer doesn't give any answers. And mobo does not give any code. Only thing, for what i can tell from the logs, is Critical error "The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly." (Event ID 41, task category (63)). 

Not a once, this has happened when pc was under some sort of load. I've been gaming with this just fine and today it ran AIDA64 stress test fine for 4hrs straight. It crashed when I came home flicked mouse so that screens will power on from hibernation. Then few seconds and puff. 

 

I have not added any hardware inside my pc but a fan controller and a fan led controller, which were both disconnected during this AIDA64 run. Even run the pc from different power extension hub cord, what ever it is in English. 

 

I can post event viewer logs, if someone actually can see what is going on with my pc. Just tell me what you need and I will provide it. 

 

[vaiwalker]

run a ram diagnostics. might be a faulty ram or it isnt seated properly thus the pc might encounter read/write problems and restarts.

[AugOwnz]

That sounds like PSU to me... had that happen before.

[stimby]

46 minutes ago, AugOwnz said:

That sounds like PSU to me... had that happen before.

I've had this PSU for like a year now and problems before. Would not like to buy another one only for debugging, but that might be what needs to be done if nothing else works. 

57 minutes ago, vaiwalker said:

run a ram diagnostics. might be a faulty ram or it isnt seated properly thus the pc might encounter read/write problems and restarts.

Going to run memtest soonish! 

Someone has same problems as I do, except does it under load. https://www.reddit.com/r/techsupport/comments/8114rj/computer_suddenly_shuts_off_and_fans_go_max_speed/

 

[AugOwnz]

4 minutes ago, stimby said:

I've had this PSU for like a year now and problems before. Would not like to buy another one only for debugging, but that might be what needs to be done if nothing else works. 

Going to run memtest soonish! 

Someone has same problems as I do, except does it under load. https://www.reddit.com/r/techsupport/comments/8114rj/computer_suddenly_shuts_off_and_fans_go_max_speed/

 

Same thing happened to me, with a good psu that was behaving itself forever and with more wattage capacity as spare (with that config you only have about 100/150w of extra power if you don`t overclock).