3rd monitor suddenly stopped displaying HD7970 Eyefinity

[FredWithSpread]

Hi Guys!

I've been using Eyefinity displaygroups for >6 months when suddenly the 3rd screen isn't working any more. I've tried connecting all 3 displays in different ports and with different cables, so I know all hardware is working properly. This problem occurred after coming back from a long vacation (possibly caused by a windows update?). When I unplug monitor 1 or 2, the 3rd one comes alive as if nothing happend. When I plug monitor 1 or 2 back in again, the 3rd monitor dies.

• 
  I have Asus HD7970 (which is ~3 years old) (4x DisplayPort, 2x DVI sockets)
  3x BenQ GL2760H monitors (all of the connected via DisplayPort-HDMI-cables)
  Windows 10

I have tried updating drivers to no avail (using the AMD settings tool), using driver sweeper. I've tried using different combinations of all the cables I have at my disposal (DVI-DVI, VGA-VGA, HDMI-VGA , HDMI-HDMI, DisplayPort-HDMI) but the result is the same. I don't have any active adapters, and this setup was previously working flawlessly for over 6 months.

Any idea what could be wrong? Many similar threads suggest buying active adapters, but I am annoyed by that, because my setup was working flawlessly before. If that ends up being the solution, would I need 1 active adapter or 3? Which product would you recommend?

I've included driver version and some more below, if that is any help

https://s32.postimg.org/qb69ph6df/Details.png

Thanks in advance!

-Fred

Edit: Some threads online suggests lowering the resolution for each monitor to see if that will allow the 3rd one to awaken. I have tried this and it did not make any difference.

 

[FredWithSpread]

I ended up buying an active DisplayPort-to-DVI adapter today, which solved the issue for me. I still don't know why the problem suddenly started in the first place.

This is the adapter I bought : https://www.inet.se/produkt/5409070/adapter-xfx-displayport-ha-till-dvi-ho-aktiv (price ~ $40)