WHEA UNCORRECTABLE error on Ryzen 5 3600


New Member
I just build my system last month and it was running smooth until recently it started causing BSOD. Most of the times the error is WHEA UNCORRECTABLE ERROR. The system stays at blue screen collected data but process never goes beyond 0% and have to reset the system. When system boots, it always starts with, “insert correct boot media and press any key to continue”.
the way to go past this is keep system turned off for a while and turn on again.
mini dump files are not being created.

System specs
Processor: Ryzen 5 3600
Board: Gigabyte B550M DS3H
Ram: Corsair Vengeance 16 GB ( single stick) 3200mhz
SSD: Adata swordfish 240 gb
PSU: Corsair VS650
GPU: AMD R7 200 Series (265)
Bios version: F12
OS: windows 10 build 20h2

When issue occurs
First whenever I started playing games on Gameloop gaming buddy, while game loads, system hangs for a while. Blue screen and dead. I thought the issue is with gameloop so repaired it. Removed games and reinstalled. No help. Then I played Medal of Honor, and during that too error occurred so not specifically it was related to gameloop.

what I have tried so far:
Updated or downgraded or even tried different GPU drivers.
changed GPU to nvidia GTX 1050Ti
Changed Ram slots
Updated BIOS to 13f and then returns to F12
Changed M2 slots for SSD
Reinstalled windows plenty of times, tested version 1709 too. It worked for a while but when I upgraded to 20H2 build. Again issues.
Turned SMT disabled in the bios setting.
This too worked for a while but not anymore.
Also tested memtest to check if RAM is the culprit but no errors were found.

i am out of ideas now and I have no idea how and where to seek help.