Attempting a Catalina install

So this is a previous Hackintosh that was working fine, however I had to replace the GPU with a 5700xt. I’ve tried getting Catalina going, and can make it to the install screen, however I’m getting some really weird graphical glitches (attached). When moving the mouse (which is a massive square), the interface elements still appear to be in the middle of the monitor, but are actually rendered half off the screen on the top right. Has anyone come across this before? Currently using DisplayPort fwiw. Tried OpenCore, couldn’t make it past the boot loader menu, so it’s currently Clover with the standard lilu, whatevergreen etc.

https://imgur.com/a/J9XDVQi/

submitted by /u/simoncoulton
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