I am running the following in a custom windows 10 desktop.
Sapphire Radeon R9 290x 4gb.
AMD fx-8150 octacore.
ASUS Crosshair V Formula motherboard
800w Rosewill power.
16gb Corsair ram.
The problem I am having is whenever I'm doing something that uses the video card, this started in the last two weeks or so, the screen will randomly refresh. Takes 1~3 seconds and interrupts whatever I'm doing. It's the same thing that happens whenever a new monitor is being plugged or unplugged. I investigated this and found that I have a third monitor connected that doesn't exist. The computer thinks its plugged into the empty displayport on the video card. It is listed as a generic non-pnp monitor and has a default 640x480 resolution even though there is nothing there. I've used DDU to cleanse all monitors and drivers related to it. Then I reinstalled only the drivers via the AMD website, mainly the Radeon settings app in the screenshot. The 'ghost' monitor immediately came back. I don't know what else to do at this point. I cleaned the inside of my computer, blew out all the ports, made sure there was no foreign matter possibly causing it.