3 Replies Latest reply on Nov 6, 2018 9:29 AM by alishiro

    Windows 10 RGB444 4K 60hz 10bits mode issue

    mephino

      Graphic Card:RX580

      Radeon Driver:18.10.2

      Monitor : BenQ EW3270u

      Connection cable : DP 1.4 cable

      OS:Win 10

       

      Problem:

                     Radeon Driver 18.10.2

                     In RGB444 / 4K / 60hz mode ,  I can't enable 10-bit color depth

                     The AMD control panel can see the menu for 10 bit option , but select the 10 bit will get back to 8 bit after monitor blink out for a sec

                     The windows 10 display information show the display mode still in 8 bits

       

                     Radeon Driver 17.11.4

                     In AMD control panel , select the 10 bit option also get back to 8 bit

                     But , the windows 10 display information show the display mode in 10 bits

        

                    Radeon Driver get some problem with 10 bit mode , this issue need to fix

        • Re: Windows 10 RGB444 4K 60hz 10bits mode issue
          ah1123

          I have same issue with the card reverting back to 8 bit on the BenQ ew3270u 4k display
          here is my setup
          Graphic Card: WX 5100

          Radeon driver: 10.Q3.1 Enterprise Edition
          Connection: DP 1.4
          OS: Windows10 Oct 2018 update
          Monitors: 4x BenQ GW2765 @ 2560x1440 10bit 
                         1x BenQ EW270u @ 2160x3840 4k

           

          the strange thing is that the 4 benq gw2765's are all running in 10bit mode, only the 4k monitor is in 8 bit. as the OP stated, I can select 10bit in the AMD settings but it just flashes the screen and then reverts back to 8bit. I did notice that if I enable HDR in the windows settings for that monitor, I can then choose 10bit without I treverting. however, this is not ideal since I am normally working desktop applications that look washed out in HDR, I only switch to HDR if I want to view media. I should be able to run the monitor in non-HDR mode AND 10bit

          • Re: Windows 10 RGB444 4K 60hz 10bits mode issue
            vwvwbg

            Same issue with all Amd card i have.

             

            Graphic Card: RX550 ,RX580, RX Vega56

            Radeon driver: 18.8.2 ,18.9.3, 18.10.2
            Connection: Lindy DP 1.4
            OS: Windows10 1803 and 1809
            Monitors: BenQ EW270u @ 2160x3840 4k

                             LG 27UD69-W @ 2160x3840 4k

             

             

            Only in YCbCr422 or in 30Hz can switch to 10bit.

            But another can easily get 4K 10bit RGB444.

            • Re: Windows 10 RGB444 4K 60hz 10bits mode issue
              alishiro

              I have same issue too.

               

              Graphic Card: RX Vega56

              Monitors: BenQ EW3270u @ 2160x3840 4k

              Radeon driver: 18.10.1 , 18.10.2
              Connection: DP 1.4
              OS: Windows10 1803

               

              Unless it is set to YCbCr422, can not operate at 10bit/60Hz.

              The value of "Current Link Settings" also does not reach the maximum bandwidth of DP1.4.

              5.4Gbps is for DP1.2.

              Setting.PNG