Question Monitor flcikers when at 144hz but not on 120hz

[TheNagazai]

Hi. My monitor does this when at 144hz. When i switch to 120hz, either with display port or hdmi, it works normally.

Build is
AMD Ryzen 7 5800X
TUF Gaming B550M (bios 2806)
Kingston Fury Beast, RGB, 16GB, 3200MHz
RTX 3060 Gigabyte
MONITOR GAMER AOC HERO 27 144HZ IPS G-SYNC

Could it be the GPU not supporting it or the monitor having problems? I already bought a new display port cable and the hdmi is barely used since it's just a spare i have.

 

[bdcrlsn]

I'm thinking either an issue with the monitor or a setting somewhere...I only think that because it works fine at 120Hz.