This one is driving me nuts.
Dell Precision Tower 5180
Windows 10 (up to date as of 7/7/18)
AMD FirePro W2100 (2x displayport)
Latest AMD drivers
Three Dell Monitors all using correct drivers
1x U2415 (Mini DP / Hub)
1x P2414H (DP)
1x P2414H (Connected to U2415 by DP)
Only two monitors will work at one time, any combination 1&2, 1&3, 2&3
Any time I try to enable/extend the display to the third monitor, Windows 10 says it cannot save the settings.
What am I missing?