RX580 gradient banding on second display

[kelskafoss]

I've encountered an issue! I added a second monitor, AOC U2790VQ 27" 4K, and am experiencing color banding in gradients. 10-bit color mode is showing as enabled, just as for the first monitor, but it's clearly not actually displaying 10 bit color. The monitor appears completely normal in Windows 10. I don't think this monitor has YCbCr capability so I assume it's running in RGB Mode. Is this a MacOS issue or a clover issue? Both monitors use DisplayPort 1.2, both are 10 bit monitors.

Radeon RX 580:
Chipset Model: Radeon RX 580
Type: GPU
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 8 GB
Vendor: AMD (0x1002)
Device ID: 0x67df
Revision ID: 0x00e7
Metal: Supported, feature set macOS GPUFamily2 v1
Displays:
LG Ultra HD:
Resolution: 3840 x 2160 (2160p 4K UHD - Ultra High Definition)
UI Looks like: 1920 x 1080 @ 60 Hz
Framebuffer Depth: 30-Bit Color (ARGB2101010)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Automatically Adjust Brightness: No
Connection Type: DisplayPort
U2790B:
Resolution: 3840 x 2160 (2160p 4K UHD - Ultra High Definition)
UI Looks like: 1920 x 1080 @ 60 Hz
Framebuffer Depth: 30-Bit Color (ARGB2101010)
Mirror: Off
Online: Yes
Rotation: Supported
Automatically Adjust Brightness: No
Connection Type: DisplayPort

 

[theruck]

if you swap the monitor ports on the GPU, is it the same?

 

[kelskafoss]

if you swap the monitor ports on the GPU, is it the same?

I swapped ports on the CPU, swapped cables, yet the issue stayed with the monitor. I am going to return it. I have a new monitor coming, hopefully the issue was in the monitor. Wife's laptop couldn't display 4K at 30hz from HDMI anyways, so I ended up getting a 1440p monitor instead.