144hz @ 1440p display link failure - not cable/device related



I'm just posting so AMD is aware they have a problem with their drivers when using 144hz @ 1440p. 


I purchased an Asus MG279Q monitor which is an 144hz@1440p IPS display.  I currently own an XFX RX 480 8GB and cannot play games at 1440p and >90hz.  I have an Asus 144hz1080p screen and it works perfectly fine.  If AMD can prove that there isn't a problem with this kind of setup, then I'll send it back.  However, this is the second mg279q to do this, only the second one I've tested with 3+ cables.


I'm currently using windows 10 pro and have installed roughly 10 different versions of radeon software on entirely fresh installs of windows.  During these tests I've used 4 different DP 1.2 cables, all certified according to the DP website and two cables from this thread.  https://www.reddit.com/r/pcmasterrace/comments/3uvp02/a_holiday_reminder_on_quality_displayport_cables/


I will live with the fact that it will not work and that's ok for now.  My problem is when VEGA comes out and it has the same issues, I may switch to green as I am an avid FPS player and need those extra 54hz.  And yes I do realize I have a freesync display, so buying green would be horrible...plus hyprocritical as I own about 10k in AMD stocks :S


My Setup / old one (same problems)

1700 @ 4.05 / 8350 @ 4.9

Asrock killer / Asus 990fx

Tridentz DDR4 3200 (@2666) / DDR3 1866

XFX RX 480 8GB, liquid cooled (custom) @ 1490/2270

EVGA 850 G2

Samsung 850 pro

Windows 10 pro (latest patches..ish)