My Build....
Mobo: Asus X-470 Pro
CPU: Ryzen 3 1300x
RAM: 2x 8gb Trident Z
GPU 1: Sapphire RX 590
GPU 2: HD 6870
PSU: Corsair 800w
So I have an extra HD 6870 laying around so I decided to throw it in my set up so I can use it for my crappy monitor that I use for Temp readouts since I've already used up the other HDMI ports on the 590. I don't have Crossfire. I tried installing catalyst-15.7.1 which is what AMD recommended. Once it was installed the second monitor didn't work. So I uninstalled it and same issue. Radeon Settings doesn't show the HD 6870 but it comes up on GPU-Z. Is there anything I can do to use the HD 6870?