Sorry for the late response, just got home.
Here you go:


…and I just noticed that the system RAM window says “Installed memory (RAM: 32.0 GB (16.0 GB usable).
I guess I never noticed it because I haven’t really had the opportunity to really dig in with this machine since I built it, and I was previously a pretty heavy Mac user, so I didn’t look for this sort of thing unless there was a problem (lucky me, there never was). I have no idea how to adjust that, or why it recognizes all of the RAM but won’t use any more than half of it.