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If you want big resolutions and big refresh rates. For example I have a 4K screen with 144 Hz refresh rate. That sort of bandwidth can only be delivered right n
by Strom 3y ago
If you want big resolutions and big refresh rates. For example I have a 4K screen with 144 Hz refresh rate. That sort of bandwidth can only be delivered right now via HDMI 2.1.
Yes there are DisplayPort standards that can reach that, but in practice all the top end GPUs have only the old DisplayPort 1.4 version. That means the only choices are to use HDMI 2.1 or to use video compression over DisplayPort 1.4.
I will say that VESA has been very successful with their Display Stream Compression (DSC). Not that the algorithm is something special, but in terms of marketing. You never see monitor reviewers talk about the fact that using DSC will give you artifacts. VESA markets this compression as visually lossless, which every non-expert explains as actually lossless. In reality the losslessness is defined in the standard as when all the observers fail to correctly identify the reference image more than 75% of the trials. Beyond that, like with any compression, it will fail at high entropy images. Take for example this 2017 study titled Large Scale Subjective Evaluation of Display Stream Compression [1] which found that performance on some images was not visually lossless, however, those images were challenging images with high entropy.
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[1] https://www.researchgate.net/publication/317425815_Large_Scale_Subjective_Evaluation_of_Display_Stream_Compression https://www.researchgate.net/publication/317425815_Large_Sca...
- izacus 3y agoThat's great, but have you actually seen those artifacts ever? (DSC also has a great property of making the image delivery significantly more resilient to cable issues and thus much more reliable for most people using high res monitors.)
- Strom 3y ago> That's great, but have you actually seen those artifacts ever? No, I use HDMI 2.1 without DSC. Otherwise though, yes I have very good vision and work with images professionally. I do spot artifacts when they are there. I get it that not everyone needs perfect images. I mean, people watching YouTube certainly won't be able to tell if there is an additional artifact on top of the low bitrate video they're watching.
- Sakos 3y agoDSC also has the great property of causing my RTX 3060 to crash if I try to watch videos on an external monitor and do the wrong thing on my main display. This issue has gone unresolved for over a year now. HDMI, DSC and NVIDIA can go eat a big bag of dicks.
- paulmd 3y agoSamsung G9 neo? Probably not Nvidia’s fault there lol, Samsung gonna Samsung https://m.youtube.com/watch?v=iZ7N4GLoiBA https://m.youtube.com/watch?v=iZ7N4GLoiBA
- Sakos 3y agoNope, affects several different monitors. It's also not flickering, the GPU driver will crash and stop sending output to the external monitor. At times it's even hung my entire system.
- zokier 3y agoAMD 7000 series has DP2.1
- Quekid5 3y agoNot that I'm looking for a replacement right now, but I guess that confirms why I'm committed to Sparkle Motion^W^W AMD :)
- Strom 3y agoLooks like some DP2.1 monitors were announced at CES this year too, so things are finally coming together!
- preisschild 3y agoMy Samsung G95NC already supports DP2.1
- paulmd 3y agothe ability to use it at full speed is segmented to the workstation cards though
- preisschild 3y agoThe AMD RX 7000 series supports DP2.1 already and there are already monitors that do too (Samsung G95NC for example)
- account42 3y agoMonitors yes but not big TV-sized screens.