It was a fine morning and i wanted to turn on my PC. I clicked the power button and the fans starting going off, but mouse, keyboard, monitors and graphic tablet stood without power.

I did some googling but only found stuff that wasnt working, i came up with the idea to switch the RAM around - for some reason that worked  . The peripherals starting lighting up again and windows booted up, after a while though i got bluescreens with various error messages or 20 second freezes, sometimes screens flickering and general instability. I looked them up and tried troubleshooting. None of the suggestions worked, but stuff was hinting towards the graphics cards drivers. I played around with that for a while, switching them around etc. didnt work either.

I ran a windows built in driver thing (no idea how its called), it finished, then crashed the computer with another bluescreen and got me into a boot-loop. I had enough and reinstalled my whole system. That done i thought that was gonna be it, because there didnt seem to be any issues anymore. A day of reinstalling stuff and downloading games again, then the same thing i described in the beginning took place, seemingly random. I tried some more troubleshooting from ADVICE from the internet but nothing helped once again. Since i had warranty left for it, i sent it in 2 weeks ago, received it today and the report said that they switched out my motherboard, since it was seemingly broken. Got into Windows, everything seemed to be working fine, was finally able to play some games for 3 hours and thought that was gonna be it. I closed the game and went to watch some videos - but the same thing happens again. Frustrated i boot up and try again, but after about 5 minutes or less, the problem keeps happening.
But now the weirdest thing: Whenever i have a game called "H1Z1:KOTK" open, i just doesnt happen 
The only way i can write this right now is because i got the game running in the background... It sounds stupid i know. I dont want to send in my PC again, holidays are over before i got the chance to enjoy them, you guys are my hope.
The PC has been working for 2 and a half years now, only time something broke it was the power supply.

Operating System
   Windows 8.1 64-bit
CPU
   AMD FX-4300   
   Vishera 32nm Technology
RAM
   16,0GB Dual-Channel DDR3 666MHz (9-9-9-24)
Motherboard
   MSI 970A-G43 PLUS (MS-7974) (CPU 1)   
Graphics
   BenQ GL2460 ([email protected])
   L1942 ([email protected])
   2047MB NVIDIA GeForce GTX 760 (Palit Microsystems)
Storage
   111GB Samsung SSD 840 EVO 120GB (SSD)   
   931GB Western Digital WDC WD10EZEX-08M2NA0 (SATA)   
   TSSTcorp CDDVDW SH-224DB

Thanks in Advance!
wow, where to start.

so you have reloaded Windows, so as much as you ever can, that can be ruled out.
still assuming a software issue, it seems to work until you load something.  what are the chances it is failing at the same point in time, right after you installed the last piece of software?
is there any logic behind that theory???

then you move onto it being a hardware issue.  they replaced the mobo and PRESUMABLY tested the rest of the components (did they?) so that would leave maybe CPU or RAM as the next straws to clutch.

sadly, it sounds like it's going to be a 'suck it and see' exercise - testing one idea at a time.Yea, Windows has been wiped out completely.

I dont know if i understood the question correctly, but if you mean that the crash occurs when i do something specific, thats a no. I can have it run without anything open and it would happen. If you meant that the crash starts happening after i reinstalled windows recommended drivers or my Geforce Experience recommended drivers that could be a yes. After i completely wiped it out it seemed to have worked fine. After i got the drivers up to date it started happening again. Maybe this is just a coincidence though, because sometimes i can actually do something for a bit before it crashes.

I dont know if they tested the others, in the note it just said that the mainboard was faulty. I already checked all my RAM with MemTest86+ and let it run for 12 hours or so. Result was no errors, so the RAM is fine.while memtest is great, it's not perfect.
memtest saying your RAM passed would tell me to move onto another component - but not eliminate RAM from future testing.
if you have multiple sticks of RAM, leave only one in and run the PC, if it fails, swap the RAM and try again.

also, if possible, wipe the drive and reload Windows afresh (again, I know!) and just run it with basic Windows, no added drivers, no personal software (Word, AV etc) and see what happens.

basically, to troubleshoot, start with the bare minimum, run it, and if no issues, add one thing, then run it some more.
bare minimum also implies running the PC without your graphics card for example.  you want to get it as simple as possible and running reliably before you start adding things to the mix.

it sounds possible that you are installing something along the way, and this piece of software may be the trigger point.

so when it does go pear-shaped, is it spitting out an error message, a BSOD or simply freezing?When the crash accours, both monitors turn black, and all the peripherals dont respond anymore (different to what i had in the beginning, they dont loose power. I should have made the title differently). For example if i try to shut windows down with Keyboard shortcuts it doesnt work, neither a simple power button tap works. I can only get him restrated by holding the power button.
Aswell as that, when i had something running that plays audio, the audio distorts, but keeps playing for about 3 seconds, then going into silence.

Ill try the RAM stuff out, and ill take the GPU out and see. Thanks for the help so far, ill post results later.First.....  Stop all you are doing now, it is a waste of time and decreases the lifespan of your components.  when you post specs, use a file from Windows feedback Hub or a file that tells all hardware, revisions, drivers, and builds, also do a complete event report. EVERYTHING that happens is recorded somewhere. Always allow 20 gig of free space on a HD and have a external drive as a backup. Never allow windows to overwrite logs and events. I can already tell you what the problem likely is. You have automatic updates on or you have a background program causing conflicts, firewall perhaps.  See the file attached ?? This is the type you need to start

[attachment deleted by admin to conserve space]All driver finder apps are garbage...start at the beginning and get all your drivers from the MBoard manuf. site...then all peripherals...What power supply did you replace the original with? Because this sounds suspiciously like power supply issues. Quote from: Accessless on August 11, 2017, 11:43:54 AM

What power supply did you replace the original with? Because this sounds suspiciously like power supply issues.

First.....  Stop all you are doing now, it is a waste of time and decreases the lifespan of your components.  when you post specs, use a file from Windows feedback Hub or a file that tells all hardware, revisions, drivers, and builds, also do a complete event report. EVERYTHING that happens is recorded somewhere. Always allow 20 gig of free space on a HD and have a external drive as a backup. Never allow windows to overwrite logs and events. I can already tell you what the problem likely is. You have automatic updates on or you have a background program causing conflicts, firewall perhaps.  See the file attached ?? This is the type you need to start

Only indication of your problems in the event viewer are Critical events that are written at boot when the system unexpectedly loses power, which is to be expected.


In any case, In the past when I have had a system unexpected freeze hard as described, I've found a few causes:

1. HDD Failure and bad sectors. It tries to read from a damaged part of the disk and it seems the take the entire system with it. the system will freeze HARD and won't BSOD or shut down on it's own in such a case. I found that running chkdsk /r on all my drives, scheduling it for reboot, and then rebooting and letting it run to completion was effective in solving the problem in those cases. It takes a good few hours to go through but it's worth eliminating I think.

2. Power management issues. I've found power management options of various kinds can sometimes contribute to a system simply hanging hard or even rebooting for no reason. Sometimes specific devices or drivers aren't compatible with sleep states and cause problems. In the cases I encountered it I just turned off all power management and it seemed to sort the issue.

3. Failing Motherboard. I've had motherboards with failing capacitors that would always hang hard after a time of being powered on. I'm not sure but we may be able to assume this isn't the case if the motherboard was replaced/repaired.

One thing to try may be to run a Linux Live installation from a DVD, and see if you see any similar issues. If you do- then that proves it is hardware. If it's not, then it's specific to the Windows Installation. (or the HDD!)

These are of course in addition to Mark's excellent suggestions.