5700 XT Not 8bit Color Depth when using a Custom Resolution

Discussion created by boxcarpilot on Apr 10, 2020

My Setup

2 monitors:
Viewsonic ViewSonic VX2758-2KP-MHD  (MAIN)


AMD Sapphire 5700XT Nitro+


Radeon Software 20.4.1


OS: Windows 10 PRO 1909 x64


Both Monitors connected via DisplayPort, with freesync enabled using two of Club3D VESA Certified CAC-2068 DisplayPort to DisplayPort 1.4  cables.


When I enable a Custom resolution for the Viewsonic monitor, Windows and Radeon Software, are reporting the ColorDepth has decreased from 8bpc to 6bpc. 



I tried a couple of settings in the custom resolution, but were in vain.
When creating this custom resolution, I'm just changing the refresh rate from 144 to 143 OR 142 Hz.


When I manually change the Color Depth from Radeon Software, from 6 bpc to 8bcp, both screen flashes, 8 bpc remains selected for 2-3 seconds, then the screen flashes again back to 6 bpc.


I need to use custom resolution, because this ViewSonic Monitor has an issue with flickering, and the workaround is to use a custom resolution with minus one (-1)  or  minus two (-2)  Hz.
 If you own a Viewsonic VX2758-2KP-MHD, please read this. : Monitors