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why isn't HD 7800 recognizing 3rd display plugged into DP slot?

Question asked by jonnyt34 on Nov 24, 2018

Would appreciate your help. Trying to add a 3rd display to my setup, but system is not recognizing it. Details below. Any ideas what's wrong?




AMD HD 7800 (driver just updated to latest)

Windows 7 64 bit

Motherboard ASUS P8Z77-V PRO

Processor i7-3770


- Two NEC 2090Uxi displays connected via DVI

- 3rd display is a Dell which connects fine when I unplug one of the NEC monitors and swap in the Dell via DVI, but system doesn't recognize the 3rd display when I plug it into the graphics card Display Port slot (using DP2DVIS DisplayPort to DVI Active Single Link adapter to make use of the DVI input on the display)