gpu Black screen when switching GPU's

[Mcburger]

So, I'll start by saying I'm fairly new to PC building. I ran into an issue I just can't figure out.

Specs:

 

Intel build-

CPU: i5 10400

MOBO: ASRock B560 steel legend

GPU: ASUS Dual Radeon™ RX 5700 EVO OC edition 8GB

RAM: XPG DDR4 D60G RGB 16GB (2x8GB)

PSU: EVGA 600w gold

Windows 10 Pro

 

RYZEN build:

CPU: RYZEN 5 3600 

Mobo: ASUSTeK Prime x570-P

GPU: SAPPHIRE NITRO Radeon RX 480 4GB

RAM: Corsair Vengeance LPX 16GB (2 X 8GB) DDR4 3600

PSU: Antec HCG650 Gold Power Supply 650 Watts 80 PLUS Gold

Windows 10 Pro

 

The Story:

 

I recently built the Intel rig and got it to POST and run using the RX480.After about a week, I wanted to benchmarck it with my RX5700 as well. The numbers weren't quite as good (Closer than I thought), so I wanted to switch back. I put the Rx480 back in the intel build and now it won't give me a display. Just a black screen. The GPU fans run and it seems to POST just fine. The Rx5700 and Rx480 worked perfectly on the RYZEN build. So i know it's not the GPU. I'm using it right now. It has to be some sort of driver issue. Here is what I tried:

 

I tried running DDU for both AMD and Intel.

I tried taking the CMOS battery out.

Switched from HDMI to DisplayPort

Tested the cables with a tv.

BioS from Auto to PCIe

Both pcie slots

Fresh install of windows.

 

 

I'm completly lost. I can get a display using the Motherboards hdmi and display port and mess with it that way or use the RX5700 but this RX480 won't go back! I gave up and I'm asking for help. We do it for the frames.lol. Thank you. Hopefully I posted this right and worded it ok.