With both sticks the memory is in dual channel mode and things are moving along at great speed. This can push instable broken systems to failure.

Try this. Be sure the BIOS is the latest, not overclocked, load the BIOS defaults and re-test.

After that, let's see what MAKE AND MODEL PSU was used and a Web Speccy to see if there is anything odd going on.

Read https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web