@harshlI'm curious how you debugged the PSU issue. I've got a similar thing going on where when I have a VM (Ubuntu) running with my GPU passed through it locks up the whole host system and I have to hard reboot. This has only happened twice thus far but seems to happen when there's higher load on the VM.
I've got a new 550w PSU any my max usage should never exceed 400w but I'm kinda grasping at straws here...