Windows 10 64 bit
16 gb ram
AMD Ryzen 5 1500x quad core processor
dual Radeon RX 460 graphics cards
3 monitors (two HDMI, one DVI cable)
* Two DELL 2007 FP 20'
* One DELL 3007 WFP 30'
Since updating my Radeon RX 460 driver I cannot run 3 monitors w/out one of them going into 'sleep mode' at startup and staying there permanently. It seems that I can only get two monitors to work on one of my video cards - I can switch the cables around to different monitors, two will always work on one of the video cards (one 2007 and one 3007) and one will be in sleep mode (one 2007). When updating the graphics card drivers, all three monitors will actually be on temporarily during the update, but once the update is finished I once again have a monitor in sleep mode.
I have updated my BIOS as well. I have scoured the internet looking for a solution to this problem. I have also tried two DVI cables and one HDMI cable, as opposed to two HDMI cables and one DVI. Both combinations result in one monitor staying in sleep mode.
Another peculiarity I noticed is that if I boot up my computer with the 3007 (which always works) on graphics card #1, then whichever 2007 monitor I plug into graphics card #1 will work, and the other 2007 monitor that is plugged into card #2 will be asleep. If I move the DVI cable for the working 3007 from graphics card #1 to #2, the 3007 will not work. This also applies if I boot up my computer w/ the 3007 in graphics card #2 - I can also plug in a 2007 into graphics card #2 and both monitors will work, but the other 2007 that I plug into graphics card #1 will be asleep.
Any help on this issue is very much appreciated. I find this issue quite puzzling and have never seen this before.