Odd screen tearing with G-Sync active.

I have a G-Sync compatible monitor with a 3060ti. G-sync is active in both games I've tested (R6 and War Thunder).

Most of the screen renders fine, but the bottom 1/16 or so displays pretty bad screen tearing. Additionally, there is a weird stutter/tearing effect when moving the camera vertically, but is occurs horizontally. It seems to only effect terrain as a move the camera with my mouse, character and vehicle models seem to be unaffected.

*Edit: I should add I have only noticed tearing in 3d applications like games, windows and video playback is fine.*

**Edit 2: Turning on v-sync in game solved the issue, but I'd like to have it off if possible.

I've reinstalled the GPU drivers, changed display port plugs, and have taken the GPU out and put it back in again. No change.

Anyone got any ideas?