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Computer randomly shut off.

MaliciousChimera
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I was playing runescape and reading reddit when my custom pc just shut off randomly. It has done this twice and each time has not caused any sort of error message or prompt to show up.

 

This is the build in its entirety. if you need anymore info just let me know.

http://pcpartpicker.com/p/ppZtHx

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NSA <3

CPU: R5 5800X3D Motherboard - MSI X570 Gaming Plus RAM - 32GB Corsair DDR4 GPU - XFX 7900 XTX 4GB Case - NZXT H5 Flow (White) Storage - 2X 4TB Samsung 990 Pro PSU - Corsair RM100E Cooling - Corsair H100i Elite Capellix Keyboard Corsair K70 (Brown Switches)  Mouse - Corsair Nightsword RGB

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I would start by checking temps but the PSU you have is kinda dodgy.

My modded Air 540 build

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Is the system going completely down, powering completely off? Are lights and fans staying on, but the system is not responsive with the power and reset buttons doing nothing, requiring you to flip the switch on the power supply in order to get it to come back on?

Wife's build: Amethyst - Ryzen 9 3900X, 32GB G.Skill Ripjaws V DDR4-3200, ASUS Prime X570-P, EVGA RTX 3080 FTW3 12GB, Corsair Obsidian 750D, Corsair RM1000 (yellow label)

My build: Mira - Ryzen 7 3700X, 32GB EVGA DDR4-3200, ASUS Prime X470-PRO, EVGA RTX 3070 XC3, beQuiet Dark Base 900, EVGA 1000 G6

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The temps are fine sitting in the 50s. 

 

The systems is turning off 100% lights off just as if I had pressed shut down.

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The temps are fine sitting in the 50s. 

 

The systems is turning off 100% lights off just as if I had pressed shut down.

 

Seems like the PSU is dying. 

My modded Air 540 build

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The problem is either your mainboard or your power supply. I'd start with the latter. If you have another PSU handy, then try hooking it up to your components to see if everything remains stable. If so, then change out your PSU. If not, then your mainboard may be the culprit.

Wife's build: Amethyst - Ryzen 9 3900X, 32GB G.Skill Ripjaws V DDR4-3200, ASUS Prime X570-P, EVGA RTX 3080 FTW3 12GB, Corsair Obsidian 750D, Corsair RM1000 (yellow label)

My build: Mira - Ryzen 7 3700X, 32GB EVGA DDR4-3200, ASUS Prime X470-PRO, EVGA RTX 3070 XC3, beQuiet Dark Base 900, EVGA 1000 G6

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Well i dont have another MOBO or PSU handy so i cant check that. even if i could there is not a specific time or reason it shuts off.

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