Odd Issues with computer turning off.

Scandalized · Nov 23, 2017

so this is going to be a difficult 1 to explain.

So If i just turn on my PC let it boot up (takes like 20 seconds), i can then do whatever i like no problem. no stuttering, no slow loading no nothing all seems fine. temperatures are normal. i can jump into a game, watch videos even start rendering something. but after 15 to 20 minutes it turns off, as if i just flipped the switch on the PSU off and on again. then i get the boot failure screen upon it automatically booting itself back up again, now it does this even if i just sit at the desktop and stare at the screen not even touching a single thing, It'll switch off after the 15 to 20 minutes, and then back on again after about half a second and boot to the boot failure screen.

Now if before doing that i hit delete to go to the BIOS screen and just save and exit or exit without saving, i can do what i want as above and it WILL NOT turn off randomly and boot up to the boot failure screen, i could even pull an all nighter playing any games of my choice, and not have a single issue

Also to be clear i have NEVER messed with the BIOS settings
PC specs Copied straight from Speccy:
BIOS version F5
PSU: Corsair Ax1200i
Operating System
Windows 10 Pro 64-bit
CPU
Intel Core i7 4790K @ 4.00GHz
RAM
32.0GB Dual-Channel DDR3 @ 799MHz (10-10-10-30)
Motherboard
Gigabyte Technology Co. Ltd. Z97X-SOC-CF (SOCKET 0)
Graphics
BenQ XL2430T (1920x1080@144Hz)
BenQ GL2450H (1920x1080@60Hz)
Intel HD Graphics 4600 (Gigabyte)
NVIDIA GeForce GTX 1080 (ASUStek Computer Inc)
ForceWare version: 388.13
SLI Disabled
Storage
232GB Samsung SSD 840 EVO 250GB (SSD)
232GB Samsung SSD 840 EVO 250GB (SSD)
465GB Seagate ST500DM002-1BD142 (SATA)
465GB Samsung SSD 850 EVO 500GB (SSD)
464GB Microsoft Storage Space Device (SSD)

Any1 got any suggestions on how to fix this?

DRagor · Nov 23, 2017

Boot failure screen - and what cause of failure it lists?
A small experiment, if you don't mind: do all as normally you do to make it work, then play for about an hour. Shut down. Then turn it back again. Will it still go off after 15-20 minutes, or will keep going indefinitely?

Scandalized · Nov 23, 2017

i HAVE to enter the BIOS for it to not switch off after 15 to 20 minutes. but I'm running another test of that now as im typing this.

Scandalized · Nov 23, 2017

this is a screenshot of everything i can see while i wait to see if it turns off.
https://gyazo.com/cd2992ca3fcc6862bc0ae070b0a4b978

SkyNetRising · Nov 23, 2017

Scandalized :

Turn off automatic restart on system failure.
You'll get BSOD and will be able to read, what the problem was.

Scandalized · Nov 23, 2017

ok so this is what happens after it turns off, All BIOS settings are set to default settings. even after going to bios loading defaults, letting the Pc boot up, then shutting down. and turning the PC on again then waiting for the 15 to 20 minutes for the shut off.

https://gyazo.com/d41b9ea3f32c70a86869111ab97bfa7c

DRagor · Nov 23, 2017

Speccy shows ram running at 1600 MHz, while at BIOS failure screen you have 1333 MHz. Like your mobo had problem with correctly setting it.

Scandalized · Nov 23, 2017

Hmm, however when i enter BIOS and just leave with save n exit or exit without saving it runs at 1600Mhz with no problems. also i disabled auto restarts as skynetrising suggested. was no BSOD just turns off and reboots to the boot failure screen.
How do i make sure it loads 1600Mhz properly on initial boot up?

DRagor · Nov 23, 2017

While the problem with RAM settings explains nicely those reboots and boot failure screen, it does not give any explanation toward your initial problem which is sudden power down. Because if ram settings on initial boot would be faulty (and why it does not keep good, working settings from previous day?), you would rather experience BSODs or freezes, at random time intervals, not a power down after same amount of time. So for me, it more and more looks like cold boot problem with PSU.

Scandalized · Nov 23, 2017

Everything was fine until i had an intel chipset update in the summer. i have tried it with my other PSU which is an AX860i aswell as some cheap £20 600w PSU and the exact same issue occurs as that was my first assumption, but what im really confused about is that, if i leave my comp off overnight, log on the next day but go right to BIOS save n exit or exit without saving. theres no problems at all. shouls i update the BIOS to F7 as its currently F5? would that work at all?

DRagor · Nov 23, 2017

I don't see anything in newer BIOS version that could help here. Perhaps if you roll back intel chipset driver to previous version, or you did already tried that too?

SkyNetRising · Nov 23, 2017

Can you post screenshot from CPU-Z memory and spd sections?

Scandalized · Nov 24, 2017

ok, sorry for late reply. I had to get some sleep, anyway, ive tried turning off XMP which seems to have set my RAM down to 1333Mhz, currently waiting for the inevitable system failure.

https://gyazo.com/6496b48b4a60b6fba38e1ac23f17e1f3 Memory
https://gyazo.com/09f609960b607ed1a2f1d6532143c3d2 SPD
slot#1 to #4 are identical as they should be

Update: Disabling XMP did not fix anything, and making sure everything was set to "auto" still got the system failure. although this time it booted right back up without coming to the boot failure screen, as if i just switched it on myself.

DRagor · Nov 24, 2017

So that only confirms that ram settings were indeed cause for multiple reboots. However that still says nothing about the cause of primary failure. I'm out of ideas on that.

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