Mac mini 2012 help

Starting a few months ago, the machine would randomly restart and say it hard to restart because of a problem. When this started, there were no hardware changes (SSD and additional RAM were added over a year before prior).

I’ve done internet recovery, still crashing. It does these crashes on Mavericks and Mojave and most between.

Doesn’t matter what I’m doing, as the computer could be sleeping, just web browsing, or light gaming.

Only thing that helps it is running Windows.

Genius Bar says to try a different SSD but the same exact model in a different Mac works just fine.