Desktop Monitor colour banding, driving me insane!

[Kailoren]

My monitor has started colour banding only with darks/blacks and since my main game is Elite Dangerous, this is VERY annoying when 90% of the game is just the blackness of space. It's EXTREMELY frustrating and I can't take it any more, so I'm hoping someone on here can help me fix this for good! This happened a few months ago on my laptop but then seemed to fix itself (?) so idk what to do now. It is VERY noticeable on my main monitor, and it's there but barely noticeable on my 2nd monitor.

Full system specs:
Main Monitor - AOC CQ27G2U G-Line 144hz Curved 27" (via DP cable)
2nd Monitor - Dell U2417H 24" 60hz (via HDMI cable)
OS - Windows 10 Home 64-bit Build Version 19041

Motherboard - MSI Z370 Gaming Pro Carbon
Ram - Corsair Vengeance 16gb dual channel
CPU - Intel i5-8600K @ 3.60ghz (currently overclocked to 4.5ghz)
GPU - Gigabyte Aorus RTX 3070Ti Master 8gb
PSU - Corsair RM1000x
 

THINGS I HAVE ALREADY TRIED THAT DID NOT FIX IT:
- Changing from 8bpc in the windows settings (it wont let me change to anything else)
- Changing from 8bpc in the nvidia control panel (it wont give any other option than 8bpc)
- Updating drivers
- Rolling back nvidia drivers
- Changing the display resolution
- Changing the display refresh rate
- Calibrating the colour in windows calibration tool (lowering the gamma doesn't fix the issue it just makes everything look awful because it's way too dark, and I can still see the banding)
- Changing gamma/colour settings directly on the monitor itself
- Different DP/HDMI cables
- Changing to different colour options in the nvidia control panel (RGB/YCbCr422/YCbCr444 in both full and partial dynamic range, as well as highest colour depth of 32-bit)
- Using default settings on everything in the nvidia control panel

 

Reference Pictures:
Elite Dangerous showing the colours being patchy and pixellated



NVIDIA Control Panel Settings:



Windows display settings:

[Kailoren]

Bumping, please someone must have a fix for this. I updated windows AGAIN at the weekend and all drivers are up to date. It has to be an nvidia or win10 issue since it happened on two different systems