Pc shutting down, Cant find the reason

Causes for such shutdowns are only 2:

• overheating,
  psu protection kicking in.

What temperatures are you getting during gaming session?
Is anything overclocked?

Edit. Those errors don't tell anything. And temperatures seem fine.

Then reduce GPU overclock. Nvidia reference clocks are 1050mhz/1178mhz (base/boost).

We're trying to isolate things.

1. I know I don't have to tell you that problems like the ones you've been experiencing are some of the hardest to diagnose, let alone resolve. There are myriad issues that can be causing what you're experiencing.

2. The only significant clue is that the genesis of the problem(s) began when you installed a new motherboard, memory, and CPU.

3. Set aside the seller's "report" that tests revealed no problems with those replacement parts. (At least I'm assuming those were the "parts tested"). Maybe yes, maybe no.

4. Just for starters...have you checked the health of the CPU with the IntelProcessorDiagnostic Tool? If not, do so. You've indicated you already checked out the memory and that's apparently OK.

5. Obviously that leaves the motherboard. In situations like yours. And it's practically impossible to determine if the MB is the culprit. Only a replacement can be definitive for diagnostic purposes and for obvious reasons that's usually not practical for most PC users.

6. You've checked out the health of ALL the drives involved, right? (We're talking about Win 10 here, yes? I don't recall if you mentioned the OS.

7. What we do in situations like yours is to simply "start over" as it were. (I realize some of the following are very basic techniques that I'm sure you already know, but bear with me.)

The basic approach would be along the following lines...
A. Get inside your desktop computer case (after disconnecting the A/C plug from your wall socket) and determine that the CPU, heat sink, memory modules & graphics card are all properly seated and all connections appear secure. Remove (disconnect) ALL peripheral devices including ALL HDD & SSD drive(s), optical drive(s), sound card, etc. Disconnect ALL storage devices, printers, and any other devices connected to the machine.

(As an aside, if it's not too onerous, it would be even better if your would remove the motherboard + components from the case and work with it outside of the case - perhaps on the cardboard case the MB was packaged in if you still have it or some other non-electric conducting surface, e.g., cardboard, wood, etc.)

B. In any event, all you'll be working with is your motherboard, processor, heat sink, RAM, graphics card, power supply, keyboard & mouse. Better yet, should your motherboard have onboard graphics capability, disconnect your graphics/video card from the system. Just ensure that following access of the BIOS/UEFI interface, if there is a BIOS setting for onboard graphics display that BIOS setting is enabled since that setting is frequently disabled as the default setting.

C. Reconnect your A/C cord and power on the system. What happens? Do you get a "normal" screen display? No error messages or strange notations from the system?

D. Can you access your BIOS/UEFI without any difficulty at this point and review the CMOS-BIOS settings? In particular, ensure that the SATA controller mode is set to AHCI (which should be the default setting). Check the hardware monitor/PC Health in the BIOS to determine that all temps are within normal range?

E. Assuming all is well at this point leave the system powered on for the next hour or so, checking to see if anything untoward shows up. Using your reset button, try powering down & up a few times to determine if there are any problems there.

F. Now you can install your graphics card in case it hasn't as yet been installed.

G. Along the way of the above steps if there's any indication of a faulty PSU, test that component with a PSU power tester (assuming you have one) or better yet, substitute a known non-defective PSU should one be available. (Actually you can forgo this step since you are certain you're working with a non-defective PSU.)

H. Should all appear well at this point this is an indication that there's nothing wrong with the basic components of your system. While not absolutely definitive this is so, it's a very strong indication that something else is amiss.

All this, of course, is to rule out at least to some degree) that the problem is not hardware-related insofar as the basic components currently installed in the PC.

Finally, install any BIOS update.

8. At this point install the SSD boot drive in your system and boot to the OS. Hopefully the system will boot & function problem-free. Work with the boot drive as the ONLY drive installed for some time to determine no problems exist. And, of course, work with your games if any are installed on the SSD.

9. Install your secondary HDD and similarly work with the system to determine all is well.

10. Then the other secondary HDD.

I just don't see any other practical series of troubleshooting steps at this point but perhaps you have some other ideas. I realize all the above is pretty basic stuff but I don't see any other course of action at this point unless something jumps out at you during the above. Good luck.

Frankly, at this stage of the game I would advise you to initiate RMA proceedings with ASUS re the motherboard. I assume it's still under the usual 3-yr warranty.

I suspect that GPU is causing OVP or OCP protection of PSU to kick in.

Frankly, at this stage of the game I would advise you to initiate RMA proceedings with ASUS re the motherboard. I assume it's still under the usual 3-yr warranty.

Did you try reducing GPU overclock?
Try with different GPU/different PSU.

So you initially replaced motherboard, ram, cpu;
then replaced psu;
then replaced motherboard, ram, cpu again.

Only thing left standing is gpu and drives.
As I said before - try with a different gpu.


Could be some kind of infection/malware/keyloger.

If it were me, I'd choose the motherboard. I believe you've more-or-less tested all the other basic components that will make up your system.
If you go that route perform the build carefully, ensuring that you've properly/securely connected your components and carefully installed the OS.