Friday, December 13th 2024

Next-Gen HDMI Specifications to Be Announced in January Before CES 2025

The HDMI Forum confirmed the development of the next-generation HDMI standard with increased bandwidth. According to various media reports, including Videocardz and Dday, the press release from HDMI Forum indicates the possibility of new cables or refinement of existing specifications. Moreover, it could mean we will have new HDMI 2.2 specs. The current HDMI 2.1 specifications, established in 2017, provide bandwidth up to 48 Gbps and support native non-DSC configurations for 4K at 144 Hz and 8K at 30 Hz. When combined with Display Stream Compression (DSC) technology, the current standard can handle up to 10K at 120 Hz. A bandwidth increase could enable higher resolutions and refresh rates without DSC compression.

This development of new HDMI specifications is due to the emergence of other display interface standards such as DisplayPort 2.1, which offers up to 80 Gbps over UHBR20. AMD's Radeon RX 7000 series and Intel's recently launched Arc Battlemage GPUs support UHBR 13.5 while the Radeon PRO supports UHBR20. The HDMI Forum is scheduled to release these new specifications on January 6th, one day before the official CES 2025 opening event on January 7th. With the launch of NVIDIA's GeForce RTX 50 and AMD's Radeon RX 8000 series at CES 2025, it would be interesting to see if the latest graphics cards will support the HDMI 2.2 specs.
Sources: Videocardz, Dday
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34 Comments on Next-Gen HDMI Specifications to Be Announced in January Before CES 2025

#1
3valatzy
Finally! Great for 8K@240Hz@10-bit videos:

For now, only the AMD Radeon PRO support DisplayPort 2.1 @UHBR20 - 80 Gbps full max speed.

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#2
bonehead123
First we had 100's of assorted variations on USB generations/specs/versions naming conventions, which was & still is a clusterf*ck to say the least, and it appears the same thing will happen with HDMI :D
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#3
Daven
I bet this gets adopted faster than DP2.
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#4
AnarchoPrimitiv
bonehead123First we had 100's of assorted variations on USB generations/specs/versions naming conventions, which was & still is a clusterf*ck to say the least, and it appears the same thing will happen with HDMI :D
I know, it's ridiculous
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#5
Tomorrow
Great. Now we wait 5+ years until it's actually adopted and used on scale...
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#6
Baba
That's definitely needed for the 8k TVs. Right now they're limited to 8k @ 60Hz.
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#7
sephiroth117
I wonder if it will be higher than DP2.1 (80gbps)

I bought a DP 2.1 display, just waiting for newer GPUs now, hoping they do not go insane on the pricing

DSC is very good but I upgraded my display anyway, going with no DSC is just a nice bonus at this point, recently got a 4K oled and it had DP2.1 UHBR20
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#8
ir_cow
DavenI bet this gets adopted faster than DP2.
Right? I've been waiting 2 years for DP2, yet no cards support it yet.
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#9
3valatzy
ir_cowRight? I've been waiting 2 years for DP2, yet no cards support it yet.
Radeon RX 7900 XTX supports DP2 at only limited UHBR13 or 54 Gbps, not the full UHBR20 or 80 Gbps.

Still better than Nvidia's which doesn't support anything of the above at all.
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#10
Daven
ir_cowRight? I've been waiting 2 years for DP2, yet no cards support it yet.
Alchemist and RDNA3 have DP2 these last two years. Battlemage has it too. I bought 7900XT for DP2 (don’t care about Nvidia cards because I don’t use RT or super sampling).

It’s the monitor selection with DP2 that’s abysmal.
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#11
ir_cow
@Daven Looking for UHBR20, not HDMI 2.1 bandwidth :)
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#12
AcE
Considering fact that HDMI is foremost for TVs not monitors, this is more than unneeded and irrelevant, nobody uses a TV that needs any higher spec than HDMI2.1 can currently provide. In other words, HDMI 2.1 is already plenty fast.
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#13
Dr. Dro
AcEConsidering fact that HDMI is foremost for TVs not monitors, this is more than unneeded and irrelevant, nobody uses a TV that needs any higher spec than HDMI2.1 can currently provide. In other words, HDMI 2.1 is already plenty fast.
It'd be a shame if some of the very best displays for PC gaming today were, in fact, TVs... ;)
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#14
TumbleGeorge
sephiroth117I wonder if it will be higher than DP2.1 (80gbps)
Is possible. USB4 v2.0 and Thunderbolt 5 support up to 120gbps in one direction.
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#15
chrcoluk
TomorrowGreat. Now we wait 5+ years until it's actually adopted and used on scale...
That's the market, its harder to get people to upgrade when not drip feeding tech advancements.

The mobile phone market mastered it and its bled into other products now.
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#17
AcE
Dr. DroIt'd be a shame if some of the very best displays for PC gaming today were, in fact, TVs... ;)
Console gaming perhaps, for PC gaming it's not even in the top 10, or top 20.

All OLED (at least the 240 ones) gaming monitors, all OLED gaming monitors with dual mode (240/480), multiple ultra wide monitors like from Samsung, are all in front of this. A big TV is suboptimal for PC usage in general, it's too big. Whereas for Console gaming it's fine.
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#18
Dr. Dro
AcEConsole gaming perhaps, for PC gaming it's not even in the top 10, or top 20.

All OLED (at least the 240 ones) gaming monitors, all OLED gaming monitors with dual mode (240/480), multiple ultra wide monitors like from Samsung, are all in front of this. A big TV is suboptimal for PC usage in general, it's too big. Whereas for Console gaming it's fine.
Haha, you'll have to pry my 55' G3 out of my cold dead hands.
Neo_MorpheusSadly, no TVs have a proper DisplayPort port, which i wanted, since the stupid HDMI consortium hates open source:

arstechnica.com/gadgets/2024/02/hdmi-forum-to-amd-no-you-cant-make-an-open-source-hdmi-2-1-driver/
DisplayPort isn't bound by HDMI Forum rules. They don't add a DP port to save costs, since HDMI already works.
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#19
Neo_Morpheus
Dr. Drosince HDMI already works.
Except when your OS is Linux.

You lose 4k@120hz, VRR and other functionality.

Intel bypassed this by using a DP to HDMI converter inside the gpu and Ngreedia doesnt even have true open source drivers.

If you want to run say ChimeraOS, (which only supports proper open source drivers) you are stuck between a rock and a hard place when using a TV.

I am curious if AMD will use the same workaround as intel with the upcoming rdna4.

A bit more info here:

www.phoronix.com/news/HDMI-2.1-OSS-Rejected
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#20
AcE
Neo_MorpheusExcept when your OS is Linux.
use windows or use a proper monitor, problem solved. Linux isn't tolerant enough for weird setups. Does a HDMI to DP (1.4+) adapter exist?
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#21
Dr. Dro
Neo_MorpheusExcept when your OS is Linux.

You lose 4k@120hz, VRR and other functionality.

Intel bypassed this by using a DP to HDMI converter inside the gpu and Ngreedia doesnt even have true open source drivers.

If you want to run say ChimeraOS, (which only supports proper open source drivers) you are stuck between a rock and a hard place when using a TV.

I am curious if AMD will use the same workaround as intel with the upcoming rdna4.

A bit more info here:

www.phoronix.com/news/HDMI-2.1-OSS-Rejected
HDMI works if you use the proprietary driver. If you opt to use Linux exclusively with open-source software, don't expect much help from the proprietary camp. This is no exception, really. Given the overwhelming minority that actually goes to that length, it becomes a "you" problem very fast, not that I don't agree that the output should be supported, just that you also have to plan ahead and build your machine accordingly if you're going to place yourself within a niche.
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#22
Neo_Morpheus
AcEuse windows
In my particualr case, I replaced my Xbox with a PC, but wanted the same console experience.

Pulling that off with Windows is a nightmare and in some case, you need to pay extra.

ChimeraOS is a clone of the SteamOS used in the Steam Deck and it works perfectly, except for this issue.

Distros are bound by the GPL and only open source drivers are accepted out of the box. some get away with the option of "Install third party drivers" but I am not entirely sure why distros like Red Hat and Fedora dont include such options out of the box.
AcEproper monitor
Havent found a proper 65" OLED monitor that replaces my LG TV.
AcELinux isn't tolerant enough for weird setups.
Please see above.
AcEDoes a HDMI to DP (1.4+) adapter exist?
Yes, but you lose VRR and if I recall correctly, HDR.
Dr. DroHDMI works if you use the proprietary driver
AMD doesnt have such thing in Linux, only in Windows.

There is the so called AMD Pro closed source driver but the AMDGPU kernel driver IS the official AMD driver. The proprietary AMDGPU-PRO driver set provides things like OpenGL, Vulkan , OpenCL, etc., but the open source Mesa project also provides that stuff.
Dr. DroIf you opt to use Linux exclusively with open-source software
Not entirely sure about the how or why, but as mentioned above, Valve, Red Hat and others will only ship open source drivers.

In that particular case, your hardware simply works out of the box without having to fiddle with anything.

The problems comes when you want to install and use closed source drivers.

what is worse, there are more and more PC monitors that only comes with HDMI and maybe a VGA port, but not a DP port.
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#23
AcE
Neo_MorpheusIn my particualr case, I replaced my Xbox with a PC, but wanted the same console experience.
I honestly have that, with Windows.
Neo_MorpheusPulling that off with Windows is a nightmare and in some case, you need to pay extra.
No nightmares here. :) Didn't pay extra.
Neo_MorpheusHavent found a proper 65" OLED monitor that replaces my LG TV.
Because 65" is far over "monitor" size, it's TV size aka "television", which isn't used for PCs (as per usual on a office table) as it implies. Your needs are just too "special". Just use Windows or accept a different size perhaps.
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#24
Neo_Morpheus
AcEI honestly have that, with Windows.
How exactly are you doing this, using PlayNite?
AcENo nightmares here.
Might be an exageration on my part, but I tried setting up PlayNite and Steam Big Picture mode and you simply have to make too many changes to get to the same spot that you get with ChimeraOS.

Have to enable autologin.

Have to set up a proper trigger to wake up the PC just with the controller.

If you dont use Xbox Games or the Xbox app, need to disable it or it will open up when you press certain buttons.

A bunch of others that I forgot.
AcEBecause 65" is far over "monitor" size, it's TV size aka "television"
Maybe you missed the part where I said I replaced my Xbox, so its couch gaming and its the living room TV.
AcEYour needs are just too "special".
I dont think that replacing a console is that special and there are plenty of others that dont want a Playstation or Xbox but want the same experience on their living room.
AcEJust use Windows or accept a different size perhaps.
See reasons above.
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#25
AcE
Neo_MorpheusHow exactly are you doing this, using PlayNite?
Why? Aren't the game launchers like Steam, Battle.net etc easy enough for you to use, it must be totally streamlined? :D Compare how easy Steam etc are to use compared to back then when we had to install every game with CDs or even diskettes, and then patch them regularly over CDs etc. - it's so easy. I don't see the need for it to be even easier.
Neo_MorpheusHave to set up a proper trigger to wake up the PC just with the controller.
I use my wireless mouse when I'm not at the PC table. Also got a smaller 2nd (wireless) Keyboard for that. I don't AFK that much so that it goes into sleep, but if i'd move my mouse 1 inch it wakes my TV up anyway then, that being said, as TVs don't have standby modes it still eats 160W (TV+AVR) even with a black screen then, while monitors go into deep standby and eat nearly nothing, so it's simply better to not go AFK with the TV being in use.
Neo_MorpheusIf you dont use Xbox Games or the Xbox app, need to disable it or it will open up when you press certain buttons.
Doesn't happen with my system, maybe I have deactivated it, not sure, but i literally have 0 hassle here. I use "monitor switcher" to switch my setups, btw. - it's a very small app. Without that, the hassle is real.
Neo_MorpheusMaybe you missed the part where I said I replaced my Xbox, so its couch gaming and its the living room TV.
Yea I wasn't sure what your setup is, you meant it literally. Well it doesn't really change my arguments, tbh.
Neo_MorpheusI dont think that replacing a console is that special and there are plenty of others that dont want a Playstation or Xbox but want the same experience on their living room.
It's not but using Linux at the same time, is. + your need to have every app streamlined into one, which is also unnecessary. Like I said, just compare to old times, whatever you do today, it's still super easy and relaxed. That being said, I'm gonna look into "PlayNite". But I mostly play at the office table anyway. I only switch for controller games.
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