AnsweredAssumed Answered

5700 XT LG Monitor - Text Rendering (4:2:2 vs 4:4:4)

Question asked by vshasta21 on Jun 17, 2020

I'm having issues displaying text clearly in Windows 10.  Pixels have a "rainbow" effect on text when using Full RGB 4:4:4 at native resolution at 144hz.  However, when I select YCbCr 4:2:2 at same resolution and refresh rate, the pixels are clear in Windows (see pictures). 

 

RGB Full (4:4:4)

RGB Full (4:4:4)

 

YCbCr 4:2:2

4:2:2

 

My understanding is that 4:4:4 ensures there is no chroma-sub sampling and should improve text, but its having the opposite effect!  Is the AMD driver working correctly?

 

System

AMD 3700X CPU

AMD 5700 XT GPU

LG 34GN850-B Monitor

DisplayPort 1.4

Latest AMD chipset and GPU driver downloaded

 

Troubleshooting

Here is what I've tried so far:

  1. Installed latest AMD 5700 XT drivers

  2. Replaced DisplayPort cable with certified 1.4

  3. Changed refresh rate (currently on 144hz at 10 bit color and RGB Full 4:4:4)

  4. Reformatted windows 10

  5. Adjusted clear type and scaling (set to 100% at native resolution)

  6. Tried alternate GPU DisplayPort inputs

 

Please help AMD!

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