Thank you for your replies! I relayed these advice to him and over the next few days we will be trying to solve this problems. Will definitely update you guys on the fix! Again, thank you so much for your attention and advice.
(his PC works normally otherwise :) )
I hope I am doing this right. I am new here and am trying to help my brother who is experiencing BSOD in his new PC whenever he played Steam games after a while (~1 hour into the game). These are the specs of his PC
AMD Ryzen 7 2700x
Asrock B450 Steel Legend
XPG D40 8gbx2 3200mhz Rgb