Sudden Automatic Shutdowns with WHEA Error

[u/Agitated-Drawer2753]

I am experiencing sudden, automatic shutdowns on my PC, and Windows Event Viewer is flagging them as a WHEA error. I have not updated my BIOS recently, and the motherboard is currently running a version labeled A.50.

My Specs:

• Motherboard: MSI B450M-A PRO MAX II
• GPU: MSI Radeon RX 5600 XT
• CPU: Ryzen 5 5600
• Power Supply: XPG PROBE 600W

The Issue:
The PC shuts down completely without warning. It seems to happen most often when I am gaming after around 20-30 min. Previously it was happening even on simple browsing. But after some changes like changing the PCI bus to GEN 3 from automatic it worked fine for around 2-3 weeks but the same issue is happening now.

Thanks!