I have been running a HD8490 on a HTPC / NAS I built a while back. I have updated all the chipset and windows drivers so that they are all current except the HD8490 which I uninstalled its driver.
Processor = Ryzen R5-2600
mb = asus x470 hero vii
PSU =seasonic prime gold 550w
WINDOWS 10 1909
I am attempting to install a Power Color red devil 5600xt.
I don't see the post or anything else when powering up on any display cable or port I have attempted with
I can only get a signal when the HD8940 is installed.
The 5600xt does light up its RGB and the fans run.
I DDU'd the old drivers off and shutdown to swap the cards as it recommends.
Do I need to install new driver software before shutting down or do you think I have a dead 5600xt.
I have tried multiple cables ports monitors yet NO JOY.
I attempted switching bios via switch. NO JOY
I also attempted to swap it into a known good PCI-E slot , put the HD8490 in the main GPU pcie slot and started it up to see if I could detect it with Device Manager. Display yes detected no :NO JOY