System has horrible artifacting and crashing frequently

[mike.simone95]

System build is as follows:
CPU: Ryzen 5 2600
GPU: Sapphire Nitro+ RX 580
Mobo: Asrock B450 ITX
RAM: 16GB G. Skill NT Series @ 2133Mhz
Storage: 250GB Samsung 860 Evo, 2TB Seagate Barracuda
PSU: Corsair TX550M

Recently my system has been crashing like crazy (once every 10-20mins).

This video I took shows what happens when it crashes.

I'm attempting to get the event logs from when the computer crashes so that I can post them here as well. I did get one BSOD with the error VIDEO_SCHEDULER_INTERNAL_ERROR, and the system crashed at the BIOS splash screen twice out of dozens upon dozens of resets.

Things I've tried to fix the problem:

• 
  -Tested GPU in confirmed working system
  -Tested sticks of RAM in the not working system individually
  -Tested different RAM in the not working system
  -Tested storage devices in confirmed working system
  -Tested display with confirmed working system
  -Tested power supply in confirmed working system
  -Replaced CPU entirely (replacement provided by Amazon, thought this was the culprit)
  -Reseated all components many times
  -Reinstalled all drivers after using DDU
  -Restored Windows from a previous version
  -Updated BIOS
  -Made sure temperatures were okay (they all were perfectly fine)
  -Cleared CMOS many times
  -Downgrading drivers to previous versions that I know worked
  -Reflashing BIOS

EDIT: I may have found part of the problem, my memory clock is locked at 300Mhz no matter what the card is doing. Watching a YouTube video in a browser window only half of the screen causes up to 95% GPU usage.

Reflashing BIOS and reverting drivers did not solve this issue. GPU memory is still stuck at 300Mhz, no matter what I set it to in Wattman

 

[Calvin7]

G.SKILL NT Series DDR4 SDRAM is available in several configurations. Do you have part number or link to what you have?

 

[mike.simone95]

G.SKILL NT Series DDR4 SDRAM is available in several configurations. Do you have part number or link to what you have?

This is the exact RAM I have. I bought 2 sticks (separately) and the system was working for the past 2 months with no problems.

https://www.newegg.com/Product/Product.aspx?Item=N82E16820231959&nm_mc=TEMC-RMA-Approvel&cm_mmc=TEMC-RMA-Approvel-_-Content-_-text-_-