Catalina hangs when I switch on my 3rd monitor

Here's my specs.

9900k 32gb 3000mhz corsair dominator Sapphire nitro+ Vega 64

My system was working fine with 2 monitors connected via display port. I was trying to get hdmi audio, and hence connected the 3rd display via hdmi to my home theatre receiver. Audio out works, and the 3rd display(which is my projector connected to the home theatre receiver) shows up under preferences.

But when I switch on the 3rd display, the whole system hangs. I restarted the Hackintosh with the projector switched on, booted into Success' href='/2020/12/install-macos-catalina-on-supported-pc.html'>Catalina and it just hanged.

Does anybody know what is going on here?

Author: @fs9019