ultra20

The ones I found were also really expensive indeed! And I think they were also always Thunderbolt 3 to 2x DP 1.2 which I don't need. I was also thinking about trying a thunderbolt 3 to thunderbolt 3 cable (40 Gbps) which supports DP Alt mode. But I wouldn't be surprised if DP Alt actually just uses up to 20 Gbps (so it becomes a USB-C cable).

Interesting! So maybe it will still be possible if I find a Thunderbolt 3 to DP 1.2 adapter?

No, I also tried two cables without a HDMI connection: USB-C (DP Alt support) to DP 1.2 USB-C (DP Alt support) to USB-C (DP Alt support) That's why I think that the bandwidth of DP 1.2 (and USB-C also) won't be sufficient as well.

After some further research I think that DP1.2 and HDMI 2.0 just don't provide sufficient bandwidth for 4K@60Hz 10bit 4:4:4. That's why MacOS switches the color depth when you change from 30Hz to 60Hz.

Yes, that's why I wrote that I think the MBP is actually always outputting a 10bit signal at 60Hz but the monitor never received it (due to DP 1.2). Otherwise, the ARGB101010 in my system report would be false/a bug which is very unlikely.

I agree, that's why I only care about 10bit. So I can still use every SDR preset but just with more colors which indeed will also lead to smoother gradients! I'd think the same, but I noticed that my MBP says it outputs 30-bit color (ARGB101010) which is also known as 10bit if I'm not mistaken. Here is a screenshot of that information on my MBP (partly in Dutch).

I have an Acer PE320QK. Unfortunately, it only supports DP 1.2 according to TFT Central. So in combination with your information, I'm thinking that the MBP is actually always outputting a 10bit signal at 60Hz but the monitor never receives it. In that case it seems like the only way to get the maximum quality out of my monitor is by using the HDMI 2.0 port? On the box it said 4K 60Hz and HDR! But maybe not in combination with each other then? Like I said before, it seems like they already don't make them anymore, so maybe the manufacturer discontinued the product because the quality was not as good as advertised.

Thanks for the quick reply! The USB-C to USB-C cable doesn't mention 10bit (it's this one https://www.startech.com/Cables/thunderbolt-3-cables/thunderbolt-3-20gbps-usb-c-cable~TBLT3MM2M) The USB-C to DP 1.4 cable supports up to 8K@60Hz bidirectional HDR! (https://www.club-3d.com/en/detail/2470/usb_type_c_cable_to_dp_1.4_8k60hz_m-m_1.8m-5.9ft/) I don't have the USB-C to HDMI 2.0 adapter anymore but it supported 4K@60Hz HDR10 (I think it was the following one but it seems like they already don't make them anymore https://www.bol.com/nl/p/deltaco-usbc-hdmi5-usb-c-naar-hdmi-2-0-adapter-met-hdr-10-ondersteuning-ultrahd-4k-60hz-hdcp-2-2-wit/9200000097694751/?productId=9200000097694751&language=en) I'm quite sure that HDR support implies 10bit support.

Hi, I have a 4K 60Hz monitor which supports 10bit color depth and a 15" 2018 MacBook Pro with a Radeon Pro 560X 4 GB GPU. However, I always get 4K@60Hz 8bit or 4K@30Hz 10bit on my monitor. I have tried various cables like USB-C to HDMI 2.0, USB-C to DP 1.4, USB-C to USB-C (20Gbps with DP ALT support). Does anyone know if this is normal (or does anyone have a suggestion to solve the issue)? Thanks!

I have tried a USB-C - DP 1.2 cable and I didn't get a 10bit signal.

Hello,I'd like to send a 4K @ 60Hz 10bit 4:4:4 signal from my 2018 MacBook Pro to my external monitor. I already tried various cables (USB-C - USB-C, USB-C - HDMI 2.0, USB-C - DP 1.2), but after having done some research, I think I can only get the required data transfer with Thunderbolt 3 to DP 1.3 or 1.4. However, it seems like those adapters don't really exist. Is it 'too early' to expect this quality from USB-C/Thunderbolt 3 and should I be patient until those kind of adapters are on the market, or is my information not correct and should it actually be possible through HDMI and USB-C? Thanks!

Thanks for taking the time to look at it. I read on this website that it is a 'flicker-less' monitor.

Hi, I thought that you could check whether you have a flicker-less monitor by holding a camera in front of it and see whether there are black lines scrolling over the display on the video of the camera. But now I doubt whether that is always the case because of this video. That monitor (Acer PE320QK aka PE0) is advertised as flicker-less, but you can clearly see flicker in the video. How is this possible? I suppose that Acer doesn't lie about the flicker-less feature, right? Thanks!