AMD 5600G with RX550, both new as this is a new PC I built recently.
5600G onboard graphics will run 2 of my 3 monitors, but the RX550 will only run 1 at a time.
Windows sees the 3rd monitor when it's hooked to the video card, but shows it as "disconnected". Extending the display to the 3rd monitor doesnt do anything, but duplicating displays will cut the third monitor on. That's the only way I can get 2 monitors to run on the RX550. Also, when I restart the PC it resets and the 3rd monitor is back to where it was.