What's causing my computer to restart?

[Yodeling Cowgirl]

Within the last 6 months or so, my computer has started to randomly reset itself. It's not overheating. I have monitored the CPU and GPU temps and also installed new/more case fans. The CPU and been replaced within the last 8 weeks. I have re-installed windows and run scans/checks on all drives. I installed a game today and it reset but since uninstalling it, the PC hasn't reset. I'm thinking it's either a PSU or RAM issue. I have done scans and the RAM doesn't have any issues but is it possible either I need more than 16GB of memory or there is a problem with my 850W power supply? What seems more likely to be the issue? Thanks in advance.

[Supafly]

What are you doing when it resets?
System specs?

[Yodeling Cowgirl]

Some times I'll log into my homepage and it resets, sometime I'm in the middle of a game. There isn't really anything in particular that I do when it resets.

Operating System
Windows 10 Pro 64-bit
CPU
Intel Core i7 7700K @ 4.20GHz 27 °C
Kaby Lake 14nm Technology
RAM
16.0GB Dual-Channel DDR4 @ 1200MHz (15-15-15-35)
Motherboard
Gigabyte Technology Co. Ltd. Gaming B8-CF (U3E1) 26 °C
Graphics
32G1WG4 (1920x1080@144Hz)
4095MB NVIDIA GeForce RTX 2080 SUPER (NVIDIA) 29 °C
Storage
223GB KINGSTON SV300S37A240G (SATA-2 (SSD)) 27 °C
465GB Samsung SSD 860 EVO 500GB (SATA (SSD)) 25 °C
2794GB Western Digital WDC WD30EZRX-00DC0B0 (SATA ) 28 °C
3726GB Seagate Expansion Desk SCSI Disk Device (USB (SATA) ) 37 °C
2794GB Seagate Expansion SCSI Disk Device (USB (SATA) ) 31 °C
Optical Drives
HL-DT-ST BDDVDRW GGC-H20L
Audio
High Definition Audio Device

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Do you get the BSOD? And if so what does it say.

[Yodeling Cowgirl]

No screens, no error messages. It just shuts down without warning then within 2-3 seconds, it starts back up again.

[Supafly]

Intermittent = nightmare to pinpoint

First thing I'd do is open a command prompt, as Administrator, and run these commands one after the other

sfc /scannow

DISM.exe /Online /Cleanup-image /Restorehealth

sfc /scannow

If no corruption/repair required reinstall the OS to rule that out

[Yodeling Cowgirl]

I've done both of those. No error messages. I ran a memory scan for about 3 hours and that found no issues. I'm stumped.

[Andrius227]

Hard to know for sure but it seems like a psu problem to me. Either a bad psu or perhaps bad cable somewhere.

I would disconnect and reconnect all cables in the pc to make sure everything is plugged in securely and if that doesnt help, replace psu.

Could also try swapping out the sata cables because its easy to do and a bad sata cable could cause restarts.

[Supafly]

Could still be a memory issue, PSU issue or something else. Intermittent are the worse because everytime you try something you have to wait to see if it happens again. I've had them before and system ran fine for 8 days and other times crashed after 2 minutes

If you have 4 Dimm slots on the motherboard switch your Ram modules from the current 2 slots to the other 2 slots.

If crash persists remove 1 module.
If crash persists Switch the installed module with the module you removed

Could also check Event viewer > Windows Log > System for Anything around the time/just before the crash. POssible something gets logged just before but then it's also possible the only thing that'll be logged is that system rebooted after not shutting down correctly. Hopefully you get lucky and something is there just before the reboot

[Yodeling Cowgirl]

Event viewer shows something called Kernel-Power error just before my computer reset 5 minutes ago

[Yodeling Cowgirl]

I've updated all the drivers and changed the power settings, that did not help

[Supafly]

引用自 The Yodeling Cowgirl：

Event viewer shows something called Kernel-Power error just before my computer reset 5 minutes ago

Possible PSU then. Can try a few things first before you RMA/replace the PSU

Check all power cables inside system, unplug then replug to ensure fully connected
If you use a Extension cable, surge protector try different ones or not using them at all.
If you Overclock go back to default
Change power plug cable, cable from plug sock to PSU

[Yodeling Cowgirl]

Thanks for your help. I'll open up the computer tomorrow and have a look, otherwise I'll just have to replace the PSU.

[Reaper]

Did you update motherboard bios before it started to restart. That's what happened to me, I just rolled back on bios update and it stopped.

[_I_]

use whocrashed to see if its a software problem

if that reports no error logs, then its most likely the psu


specs? and psu brand/model/age
post a cpuz validation link
http://www.cpuid.com/softwares/cpu-z.html
cpuz -> validate button -> submit button
it will open a browser, copy the url (address) and paste it here

[Illusion of Progress]

Restarting by itself is almost always thermal or electrical issues.

If not thermal, then electrical. And that doesn't necessarily mean the PSU. It could be the motherboard or even another part but PSU and motherboard are the first two likely (roughly in that order).

I went through this same nightmare months ago. Changed my CPU, motherboard, and RAM almost three years ago and a particular BIOS update brought "random" restarts. So I went back to a prior BIOS but then before/around last Winter season, I started getting it again, only the circumstances were a bit different but I felt it was the same likely issue.

I RMA'd my PSU (it had another issue that warranted an RMA anyway but I lived with it until then) and it didn't solve it.

I was about to RMA the motherboard and the issues just stopped. So frustrating. I later went to add a M2 SSD and found the bottom port was faulty, so I RMA'd it. Didn't want to wait on return/headaches so I just bought a new board (and did the RMA too of course). No issues since.

I think it was my motherboard all along. But start at the PSU. It's both easier and more likely.

引用自 The Yodeling Cowgirl：

Event viewer shows something called Kernel-Power error just before my computer reset 5 minutes ago

Absolutely expected. Windows makes a log that PC shut down without it being expected (i.e., without you telling it to do so). I had many of them. It does nothing to help indicated where the issue is though.