Question Constant BSOD

[henrymca]

This is in regards to my son's PC. For the past few weeks it's constantly blue screens with different errors everytime. It just does it out of random, I did a fresh install of windows 10 and it still does it. I tried only 1 stick of ram and ran memtest86 and no problems, but when I go into windows it will still crash. I've tried a news SSD with fresh windows 10 and same thing. Haven't added new hardware just starting bsod. Any ideas? I've spent 2 whole days on it and am thinking either motherboard or cpu? Specs are below
Ryzen 5 3600
Asrock B450m Pro4
32GB DDR4 3200 (silicon power)
GTX1070ti
EVGA 650B
This was built around 3 years ago and everything but memory was used.