Ok. Well, the SNES emulator should be able to run on a Pi3 easily enough. The best example I can give is Super Mario World Allstars + World. But generally, I imagine that the Pi3 should be able to run the SNES emulator without problems. I wonder if my RaspiATX card that controls the power is draining too much juice from the Pi3 thus reducing performance. Is that a possibility? I do have the switch that controls the pi from the board as an LED switch... ie it uses electricity as well.

I would use FBA a lot more, but I don't like the scaling on my CRT - it doesn't look as good as Retroarch.

Fyi, the upright, single-display version is called buggyboyjr.

Thanks for that. It actually works better than the sit-down rom, it's a lot smoother.