Question New build keeps crashing to reboot ?

[Labtec123]

So I've built a new PC, and it keeps crashing to reboot. I've done some testing that leads me to believe it's a hardware issue, but I'm not sure and if it is, not sure what exactly.
The build is as clean as I could keep it. Even at the end of the installation of windows 11 I got a crash. Crashes (not the game but the system) come mostly within minutes when starting a game (only tried Diablo IV), but also randomly with much larger intervals when not doing anything in particular.
All components are new except the Graphics Card, which is bought secondhand but did work, and as far as I know has not been used for overclocking or mining.

Details of the build:
CPU - AMD Ryzen 5 7600X 4.7 GHz 6-Core Processor (using the pre-applied thermal gel from the CPU cooler)
CPU cooler - be quiet! Pure Rock 2 Black CPU Cooler
Motherboard - ASRock B650 PG LIGHTNING ATX AM5 Motherboard
Memory - Kingston Technology Fury Beast Black 16 Gb (two 8 Gb cards, slotted into the A2 and B2 slots in the motherboard as per provided instructions)
Storage - Samsung 970 Evo Plus 2 TB M.2-2280 PCIe 3.0 X4 NVME Solid State Drive
Video card - Gigabyte GeForce RTX 3070 Ti Gaming OC 8G (Connected to the PSU with two seperate cords as per provided instructions. Connected to my old monitor with a HDMI to VGA passive adapter)
Case - Phanteks Eclipse P400A ATX Mid Tower Case
Power supply - SeaSonic B12 BC 650 W 80+ Bronze Certified ATX Power Supply
Operating system - Windows 11 Home 64 Bit

The first time I've installed the OS I had a lot of trouble installing drivers for the video card and CPU.
I kept getting 7-zip error installing the GPU drivers (tried with GeForce Experience, and manual install downloading the files from different computers).
Installing the CPU drivers I mostly got AMD error 1603.
Eventually all drivers (motherboard, windows, CPU, GPU) were installed but I kept getting crashes.
I did a new install of windows 11 and downloaded all drivers without issues this time. Kept the system as clean as I could (only installed Google Chrome and Diablo IV for testing). Kept getting crashes.

Directly after a crash I check the temps in BIOS: CPU temp is 41 C, motherboard temp is 28 C.

• I tried turning of Realtek Audio as I read that might cause random crashes - no fix.
• Tried turning of quick start - no fix.
• Tried reseating the GPU en RAM sticks - no fix.

In CMD -> SFC /scannow: corrupt files but unable to fix some of them. This turned out to be C:/windows/fonts/msgothic.tcc. (source file was also corrupted).
DISM/online/cleanupimage/restorehealth seemed to have fixed that one. Afterwards I tried SFC /scannow -> found corrupted files and repaired them.

I tried mdsched.exe it said there is an issue with the memory of your computer. Contact the manufacturer to identify the issue and fix the computer.
I tried memtest.exe -> 'copying between d691fea and d691da3 (and many more) did not result in an accurate copy.

The event viewer tells me that 8 out of 9 critical events are Kernel Power event 41, category (63), keywords (70368744177604), (2). The ninth was event 4502 WinREA agent.
Mostly the issue seems to be related to Kernel Power.
I've tried updating drivers for display adapters, control for sounds, video and adaptors, network adaptors, processors and disc drives in device manager but they were all up to date.

I tried OCCT.exe to see if I can find a fault with the hardware.
The OCCT power test freezes in seconds. Longest it ran was 26 seconds the first time, now it crashes between 1-5 seconds. The CPU temp (CTdie) reaches 96 C, the GPU temp reaches 42.36 + 59.09 C. When it freezes, it says 'No errors detected'.
I've tried the CPU test as well, and keep getting freezes:
- Small dataset: CPU reaches 97.38C. When I startup instantly afterwards in BIOS CPU temp reads 38.5C. On freeze it reads 'No errors detected'
- Large dataset: CPU reaches 75.88C. After 5 seconds of testing, 216 error were found. See provided image. A lot of errors are found on physical cores.
- CPU benchmark crashed to boot, temp reads 95C, no errors detected.


In short I think it's a hardware issue but I'm not sure.
- Overheating since the CPU temps reads very high in OCCT?
- Faulty PSU? (Note that during installing I removed one screw on the PSU because of confusing installation options but instantly put it back in again when I realized I made a mistake)
- Memory issue?
I would love any tips on how to proceed. Any ideas on how to fix the issues?

Thanks in advance!

OCCT test reading

 

[Misgar]

Am I correct in thinking Memtest reported some errors whilst checking your RAM? You need an absolutely clean bill of health on at least one full run.

If so, remove one DIMM and run Memtest again. Remove the DIMM after testing and fit the second DIMM, then run Memtest. You might find one DIMM is OK and the other is faulty. To confirm it's not A2 or B2 DIMM sockets at fault, you could try the DIMMs in A1 and B1. Computers often run with RAM in the "non optimised" soskets.

I assume you're running some variant of Memtest86 and booting from USB.

I regularly see sfc /scannow errors on all my working systems, but very rarely do I have to run DISM.

Pulling the "wrong" screw out of a PSU does no damage.

 

[Labtec123]

Am I correct in thinking Memtest reported some errors whilst checking your RAM? You need an absolutely clean bill of health on at least one full run.

If so, remove one DIMM and run Memtest again. Remove the DIMM after testing and fit the second DIMM, then run Memtest. You might find one DIMM is OK and the other is faulty. To confirm it's not A2 or B2 DIMM sockets at fault, you could try the DIMMs in A1 and B1. Computers often run with RAM in the "non optimised" soskets.

I assume you're running some variant of Memtest86 and booting from USB.

I regularly see sfc /scannow errors on all my working systems, but very rarely do I have to run DISM.

Pulling the "wrong" screw out of a PSU does no damage.

I tried testing both DIMMs seperately and afterwards both together and had no issue in any of the tests. Afterwards I had no crashes anymore. Weird since I already tried reseating the DIMMs.
Anyway, problem seems to be fixed.

Thanks a lot!

 

[Labtec123]

So, today I tried booting it up and it crashed instantly.
I got the message that an essential systemsprogram is missing or is damaged.
File: \windows\System32\drivers\pci.sys
Error code: 0xc0000221.

I'm confused. RAM testing first brought up many issues. Later RAM testing working fine. The PC worked without problems for hours afterwords.

Would this be primarily a RAM issue, and if so, how could it work for hours without fault yesterday?
Might it be a PSU problem, or related to the SSD?