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PC randomly shuts down

Snaeb_aka_Beans
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I've had this happen twice now on my gf's build.  Once it happened in front of me, PC was on for a few minutes then bam it shut down during browsing.  It's not overheating, but I am not sure if I want to tackle a PSU issue first or a board.  I'd have to rip apart a PC to get a PSU but RMA the board.  Any thoughts?

Intel Core I7-4790K 4.5GHz 1.225V, NZXT Kraken x60 AIO Cooler, EVGA Z97 FTW Board, Kingston Fury 2x8GB DDR3 1600Mhz Ram, EVGA GTX 980 TI SC+ ACX GPU, Corsair Air 540 Case w/ 3x120MM & 3x140MM Cougar Red LED Fans, EVGA G1 650W 80+ Gold PSU, Crucial MX100 512GB SSD, Samsung UD590 4k 60Hz Monitor

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I've had this happen twice now on my gf's build.  Once it happened in front of me, PC was on for a few minutes then bam it shut down during browsing.  It's not overheating, but I am not sure if I want to tackle a PSU issue first or a board.  I'd have to rip apart a PC to get a PSU but RMA the board.  Any thoughts?

it does sound like a powersupply issue...PC just shut down, no black screen, no freeze, no sound looping, no nothing?

power source is stable?

BIOS settings are at stock? reset the CMOS or make sure you are on optimized default settings first.

| CPU: Core i7-8700K @ 4.89ghz - 1.21v  |  Motherboard: Asus ROG STRIX Z370-E GAMING  |  CPU Cooler: Corsair H100i V2 |
| GPU: MSI RTX 3080Ti Ventus 3X OC  |  RAM: 32GB T-Force Delta RGB 3066mhz |
| Displays: Acer Predator XB270HU 1440p Gsync 144hz IPS Gaming monitor | Oculus Quest 3 VR

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it does sound like a powersupply issue...PC just shut down, no black screen, no freeze, no sound looping, no nothing?

power source is stable?

BIOS settings are at stock? reset the CMOS or make sure you are on optimized default settings first.

I undid the overclock by resetting the bios settings.  It did 8 hours of aida64 no issue.  It was running 4.2GHz @ 1.25V on an EVGA SLI Z75 board.

Intel Core I7-4790K 4.5GHz 1.225V, NZXT Kraken x60 AIO Cooler, EVGA Z97 FTW Board, Kingston Fury 2x8GB DDR3 1600Mhz Ram, EVGA GTX 980 TI SC+ ACX GPU, Corsair Air 540 Case w/ 3x120MM & 3x140MM Cougar Red LED Fans, EVGA G1 650W 80+ Gold PSU, Crucial MX100 512GB SSD, Samsung UD590 4k 60Hz Monitor

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I undid the overclock by resetting the bios settings.  It did 8 hours of aida64 no issue.  It was running 4.2GHz @ 1.25V on an EVGA SLI Z75 board.

so it run under full load for 8 hours straight but now it's turning off while browsing the web?! that sounds interesting...

| CPU: Core i7-8700K @ 4.89ghz - 1.21v  |  Motherboard: Asus ROG STRIX Z370-E GAMING  |  CPU Cooler: Corsair H100i V2 |
| GPU: MSI RTX 3080Ti Ventus 3X OC  |  RAM: 32GB T-Force Delta RGB 3066mhz |
| Displays: Acer Predator XB270HU 1440p Gsync 144hz IPS Gaming monitor | Oculus Quest 3 VR

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so it run under full load for 8 hours straight but now it's turning off while browsing the web?! that sounds interesting...

I am thinking PSU.  I have an XFX PSU coming in next week but for now I am gonna test with the OC turned back to default.

 

Well then turn down your OC

I am doing that now.

Intel Core I7-4790K 4.5GHz 1.225V, NZXT Kraken x60 AIO Cooler, EVGA Z97 FTW Board, Kingston Fury 2x8GB DDR3 1600Mhz Ram, EVGA GTX 980 TI SC+ ACX GPU, Corsair Air 540 Case w/ 3x120MM & 3x140MM Cougar Red LED Fans, EVGA G1 650W 80+ Gold PSU, Crucial MX100 512GB SSD, Samsung UD590 4k 60Hz Monitor

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Now the USB ports are randomly unconnecting her DVD-RW and her Xbox One Controller.  I am thinking a bad board.

Intel Core I7-4790K 4.5GHz 1.225V, NZXT Kraken x60 AIO Cooler, EVGA Z97 FTW Board, Kingston Fury 2x8GB DDR3 1600Mhz Ram, EVGA GTX 980 TI SC+ ACX GPU, Corsair Air 540 Case w/ 3x120MM & 3x140MM Cougar Red LED Fans, EVGA G1 650W 80+ Gold PSU, Crucial MX100 512GB SSD, Samsung UD590 4k 60Hz Monitor

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