Display corruption UHD 630

Hi all! Just wondering if anyone has any tips to fix this? So I'm running Big Sur on Opencore 0.7.2, a 10700k, Gigabyte z490m gaming x with a disabled-in-config 3080. The UHD 630 is running a dual monitor setup (DP 1440p@165hz, HDMI 1440p@60hz). Everything works very well and I have no problems other than the below corruption. I get it in Chrome (with hardware acceleration enabled), Spotify, Logic and Chess. It generally clears itself up after a while, which is a bit odd.
VDAchecker tells me I have full hardware acceleration and the OS feels snappy with transparency etc
I've tried: Many, many different SMbios configs (specifically ones with native UHD630 support), configuring my framebuffers/connectors through Hackintool, different bios settings, different cables, but nothing seems to clear it up. Just wondering if there's something obvious (or not so obvious) I've missed!

https://preview.redd.it/dtv75397kzt71.png?width=1276&format=png&auto=webp&s=f80df7a714e29f8c917fe1e9a1f7d5d6067c52fe