Connecting multiple 390x monitors
Actually, my friend bought 390x, HDMI, DP and a pair of DVI are available. She works with graphics, I needed a second monitor, bought a monitor with DVI output. I came to her to connect it, which in the end: You can connect one of the monitors to any of the ports - everything works, but as soon as you connect both, the video card turns off, I'm in a stupor.I know that the HDMI + DVI link does not work, but both DVI + DVI and DP + DVI do not work here ... What to do :) I didn’t have any problems either with the 290x or with the new cards.
In general, there should be no problems with 2 monitors, in principle, regardless of the interfaces used. There the dance begins after the 3rd.
Try to plug both monics into a turned off computer, turn it on, go into the BIOS, see what is there.
If the mother is new, you can try turning off the uefi video driver.
DartMaul
So I was surprised that only two monitors are working, I had dances until there were 3 cards in the system
DartMaul
By the way, it's funny, with the video core of the processor itself turned off, as well as the DISCONNECTED video card in the manager, 2 and 3 monitors work, as soon as the R9 390x is activated - all monitors are turned off except the first and the video card is turned off, hmm.