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Journeyman III
Journeyman III

Windows 10 RGB444 4K 60hz 10bits mode issue

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

84 Replies
Adept I
Adept I

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

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

Journeyman III
Journeyman III

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

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 @YCbCr422 or @30Hz can switch to 10bit.

But another can easily get 4K 10bit RGB444.

Journeyman III
Journeyman III

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

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

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Journeyman III
Journeyman III

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

I too have the same problem (differs from op that win10 actually shows 8bit/sdr, same as in driver)

Graphic Card:RX590

Radeon Driver:18.12.1

Monitor : BenQ EW3270u

Connection cable : DP 1.4 cable

OS:Win 10

As mentioned above, reducing the sampling or refresh rate, allows 10bit.

(I also see the 5.4Gbps x 4 in Adrenaline, but it's definitely a DP1.4 cable...)

I wonder if this is AMD, BenQ or the cable's fault...

Adept I
Adept I

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

I also have the same problem. When i select 4k 60 Hz 10 bit for RGB 4:4:4 it reverts back to 8 bit after flashing.

Graphic Card:Vega 64

Radeon Driver:18.12.1

Monitor : BenQ EW3270u

Connection cable : DP 1.4 cable

OS:Win 10

Adept I
Adept I

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

10bitnotworking.png

Graphic Card: RX480

Radeon Driver:18.12.3

Monitor : BenQ EW3270u

Connection cable : DP 1.4 cable

OS:Win 10

Same as OP. I have tried using another DP cable but the issue still persist. Goes black and back to 8-Bit.

Someone on Reddit (New Benq EW3270U monitor having trouble outputting 10 bit depth. : Monitors ) actually managed to output 10-Bit

and is using DP 1.4:

10bitisworkingonnvidiawtf.PNG

So how come someone not even using AMD drivers can output 10-Bit while we cannot?
Can anyone please help us here? Did anyone solve it yet?

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Adept I
Adept I

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

I have not found a resolution yet. I have tried multiple displayport cords to make sure it was not the issue. It did not make a difference. It then tested the monitor and cable using a friend's NVIDIA card, and it worked as you stated. This seems like an AMD driver issue and they clearly need to fix it.

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Adept I
Adept I

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

Yeah same here, tried two more 1.4 displayport cables and still no luck. OP in that Reddit Thread also got it working, so with you it makes 3 instances.

I even tried RadeonMod and enabled 10-Bit but that gave me a black screen, so I had to go back to Safe Mode to deactivate it.

Would someone at AMD look into this for us?

Journeyman III
Journeyman III

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

Same Porblem.

OS: Win10 1809

Driver: 19.1.1

Lindy DP 1.4 cable

Benq 3270U With Asus RX580

1.JPG

2.JPG

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