Wrong resolution recognized

[Ennercy]

since i've reinstalled windows 10 due to a boot loop after the creators update i'm experiencing a few very annoying issues.

 

first is that my third screen (BenQ XL2420T connected via DP) doesnt show anymore the resolution 1920x1080 - neither in the windows display settings nor in the nvidia control panel.

i can only select between the following res.:

 

 

GPUs are 2 980s in SLI (EVGA GTX 980 SC ACX 2.0)

 

i'm currently running the driver version 378.49 but i tried aswell the newest one when i installed the system freshly. (did then a uninstall via DDU and reinstalled 378.49 where it showed then the 1920x1080 res. but after a day or two it acted the same way only showing the stated resolutions)

 

i tried aswell using a different DP cable and trying other ports on the gpu but that didnt help either, running HDMI to the monitor shows the 1920x1080 res. without issues and also seems to work fine after several reboots.

 

the other 2 monitors i got connected are ASUS PG278QR which are both running fine on 2560x1440 native and 165Hz (aswell via DP)

 

 

would be glad if someone knows what the cause might be as before i reinstalled windows it was running flawlessly for months and i'm currently out of ideas.

 

 

 

 

 

 

 

[skimmilk5]

Have you tried unhooking the SLI bridge to see if that fixes the issue? Sometimes (though not often), SLI doesn't treat multiple-monitor setups properly.

To go further, go to the Control Panel, then System and Security, then System. In the left-side bar, click Device Manager. Open the Monitors submenu, then find the BenQ monitor that you're having trouble with. Is it showing that it is transmitting data over the DisplayPort interconnect or something else?

 

[Ennercy]

4 minutes ago, kimsejin5 said:

Have you tried unhooking the SLI bridge to see if that fixes the issue? Sometimes (though not often), SLI doesn't treat multiple-monitor setups properly.

To go further, go to the Control Panel, then System and Security, then System. In the left-side bar, click Device Manager. Open the Monitors submenu, then find the BenQ monitor that you're having trouble with. Is it showing that it is transmitting data over the DisplayPort interconnect or something else?

 

haven't tried unhooking the SLI bridge yet cause the two other screens work fine and the BenQ shows display output, just in a not appropriate resolution.

i did aswell download the display driver from the benq website and installed it via the device manager, shows the screen without any marks and on the properties it says the device is functioning properly.