Window 2012 Lab PC? - Can someone please take a look...

I re-purposed a PC to use in my home lab as a backup server. I encountered issues with a video card and I wanted to add RAM so I ended up replacing the video card, MB, CPU, memory and power supply. I also added more case fans but the system still randomly reboots itself.

I've never witnessed any of the reboots until today. I could not access a share so I switched the KVM over to the problem PC but I could not get anything on the screen for quite a while and the mouse and keyboard did not work. Then I saw a BSOD for a split second before it rebooted. The only thing I could read before the reboot was the following:

SYSTEM_SERVICE_EXCEPTION(win32.sys)

Below are some system specs:

The following are the average temps:

• SYSTIN: 30c
• CPUTIN: 41c
• AUXTIN: 30c
• TMPIN3: 40c

AMD FX-6300: 25c
HDD temp: 38C

Specs:
Motherboard: ASRock 970 Extreme 3 Rev.2.0
CPU: AMD FX-6300 Black Edition, part #: FD6300WMHKBOX
RAM: Crucial 16GB (2x8GB) DDR3-1600 / PC3-12800 DDR3 SDRAM UDIMM, part #: BLS8G3D1609DS1S00.

I ran MemTest86 (single pass) and found no errors.

Please have a look at the attached dump files and see if you can point me in the right direction.

View attachment 68300

Any help you can provide will be greatly appreciated

This morning, I tried to login but got nothing but a black screen. I hit Ctrl, Alt, Del and got the following options:
View attachment 68303

I then logged in again and got the following error and nothing but a black screen:
View attachment 68304

Run MemTest86+ to analyse your RAM. MemTest86+ - Test RAM - Windows 10 Forums

Make a photo of the result and post it.

Addition:
If errors show up you can stop the test, remove all sticks but 1 and test this single stick in each slot for 8 passes or until errors show, switch sticks and repeat.
If errors show up and you see them a lot later, no problem, the errors don't affect the test.