@dazza120 Pi 4 has been running for 10 hours now and no issues. Had never been able to run the Pi 3 overnight so I think we have a winner!

@Sean said in Is a 4K MagicMirror possible?:

Impossible with rpi. But other sbc or pc might.

Sorry to bring an old thread up from the dead but since this came up as the first result when searching on google thought I would reply to it.

4K does appear to be possible on the Pi. Set one up this weekend on a TCL 4K display. Is very stable and works well even with 3 RTSP streams also running on the page. Obviously the font becomes very small with the 4K resolution so had to change font sizes but not too difficult.

All my modules work except MMM-SingleStock. So far it loads much faster than the Pi 3. I had to abandon using MM2 because I could not run it for more than 3 hours without crashing. Fingers crossed the 4 is more stable. Will let it run overnight to see.