Question GTX 980: One display suddenly kills the other o.O

[Flomkato]

Good day everyone!

I have a weird issue with my PC: Since this morning, only one display works at the same time.
If only my DisplayPort display is connected, it shows a normal image, but as soon as the
DVI cable of my secondary display is connected, my primary display shows no image, until
I unplug the DVI display. 😳

In the windows settings, it is shown there is a second display, but activating does nothing but
reverting back to the DVI display.

Any idea guys?

 

[Lutfij]

Can you please list your specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS: include version

Which driver version are you on for your GPU? Are you on the latest BIOS update for your motherboard?

 

[Flomkato]

CPU: Intel i7-4770K @3.50 GHz
Motherboard: MSI Z87-G45 GAMING (MS-7821), BIOS American Megatrends Inc. V1.2, 17.05.2013
Ram: 32 GB ( 4X4GB @ 1333Mhz)
SSD/HDD: Samsung SSD 840 EVO 500GB / HGST Deskstar 7K4000 4GB HDS724040ALE640 + Seagate IronWolf 8TB ST8000VN0022-2EL112
GPU: MSI V317-008R GTX980
PSU: - Dont know. Enough power.
Chassis: Fractal Design Define R3
OS: Microsoft Windows 10 Pro, Version 10.0.17763 Build 17763

Which driver version are you on for your GPU?

Nvida Driver 417.71

Are you on the latest BIOS update for your motherboard?

No. But it worked until yesterday with the old version.

 

[Flomkato]

Updated Nvidia Driver to latest version. As expected, did not chance anything.
I might add: The behavior also occurs, if the DVI display is turned off!