The Video Electronics Requirements Affiliation (VESA) has introduced a fresh DisplayPort certification called Extremely-High Bit Price (UHBR) for DisplayPort 2.0. It establishes two levels of certification, DP40 and DP80, that imprint cables as succesful of as a lot as 40 and 80 gigabits of recordsdata, respectively.
VESA intends this to definite confusion, however I’ll wager it has left you scratching your head. Here’s what UHBR potential for you.
Table of Contents
What is DisplayPort UHBR?
DisplayPort Extremely-High Bit Price (UHBR) is a suite of transmission modes incorporated within the DisplayPort 2.0 standard. It comes in three flavors.
UHBR guarantees a definite minimum bandwidth per DisplayPort lane. DisplayPort 2.0 has four lanes, so efficient bandwidth in expend is four times what every UHBR transmission mode offers. Here’s the breakdown.
- UHBR 10 (4 x 10 = 40Gbps)
- UHBR 13.5 (4 x 13.5 = 54Gbps)
- UHBR 20 (4 x 20 = 80Gbps)
Video requires bandwidth, love another recordsdata, so more bandwidth interprets to aid for increased video resolutions and refresh rates.
What is UHBR certification?
DisplayPort 2.0 UHBR labeling on cables.
VESA
The DisplayPort 2.0 standard offers for the UHBR transmission modes listed above, however that doesn’t imply devices and cables must aid all of them. Each DisplayPort software maker decides the speeds their software can deal with.
That’s the place VESA DisplayPort UHBR certification steps in. This might per chance well certify that DisplayPort cables, video sources, and shows can deal with a minimum bandwidth. This draw covers two certifications.
- DP40: At the very least 40 gigabits, available by assignment of UHBR 10.
- DP80: At the very least 80 gigabits, available by assignment of UHBR 20
Search there’s no DP54 certification, which might per chance well per chance be the identical of UHBR 13.5. VESA has determined no longer to certify it one by one, as a change noting all DP80 cables can deal with UHBR 13.5.
What does UHBR imply for resolution and refresh fee?
The UHBR certification is meant to simplify buying for a DisplayPort 2.0 cable, however it indubitably doesn’t make any specific promise about supported resolutions and shows. Here is seemingly because the differ of expend conditions DisplayPort can deal with is too complex to minimize to a single figure.
That said, you should request DP40 cables to deal with a single show cowl at 4K resolution as a lot as 144Hz or 8K as a lot as 30Hz, whereas DP80 can deal with 4K 240Hz and 8K as a lot as 85Hz.
These figures are for uncompressed video. The usage of Command Hump Compression (DSC) can bump DP80’s maximum resolution to 16K at 60Hz.
Does UHBR apply to DisplayPort over USB-C and Thunderbolt?
Matt Smith/IDG
The DisplayPort Alternate that’s option for USB-C, and crucial for Thunderbolt, complies with the identical DisplayPort standards as a conventional DisplayPort cable. It is going to implement UBHR, and devices the usage of it could probably be certified for DP40 or DP80 within the identical potential.
Alternatively, the present maximum recordsdata flee of USB-C 4 and Thunderbolt 4 is 40 gigabits per 2nd, so DP80 certification is out of attain.
VESA states USB-C to DisplayPort adapters certified for UBHR will “quickly turn into available,” so in all chance certified USB-C cables will seem, as properly.
How does this overview to HDMI 2.1?
DisplayPort’s UHBR certification will seemingly be interpreted as a response to fresh controversy surrounding HDMI 2.1.
The HDMI Licensing Administrator recently “retired” HDMI 2.0, which is “mature” by HDMI 2.1a. Nonetheless this doesn’t imply all fresh HDMI devices and cables be pleased the beefy maximum capabilities of HDMI 2.1a. As a replacement, HDMI 2.1a now encompases a unfold of capabilities outlined by the outdated specification.
Advanced, appropriate? Of us that need high-efficiency HDMI 2.1a cables can no no longer as a lot as study for “Extremely High Drag” cables, which must aid at 48Gbps of bandwidth, however there’s no such shortcut for devices. It’s phenomenal to understand if a TV, video show, or PC helps the elements and bandwidth you will need.
The DisplayPort UHBR certification avoids this discipline, providing two definite tiers that make a particular promise about bandwidth.
Conclusion
Mute a small bit puzzled about DisplayPort UHBR? Here’s the breakdown.
- DisplayPort UHBR delivers no no longer as a lot as 40Gbps, and as a lot as 80Gbps.
- Devices and cables certified for DP40 and DP80 present no no longer as a lot as 40Gbps and 80Gbps, respectively.
- DP40 can deal with as a lot as 4K at 144Hz, whereas DP80 can deal with as a lot as 8K at 75Hz.
- The usage of Command Hump Compression can bump DP80’s maximum resolution to 16K at 60Hz.
- USB-C 4 and Thunderbolt 4 can meet DP40 certification requirements, even supposing software makers will want to put up for certification to advertise it.
The general public can take hold of any DisplayPort 2.0 cable (certified or no longer) and be pleased a appealing time. DisplayPort has the advantage of being overbuilt. Even DisplayPort 1.2 can deal with 4K at 60Hz or 1440p at as a lot as 144Hz.
Nonetheless in uncover for you to join a decreasing-edge 4K/144Hz video show, a video show with a resolution beyond 5K, otherwise you intend to daisy chain multiple DisplayPort monitors, it’s top to aid an seek for out for DP40 and DP80 certified cables. These will guarantee the bandwidth you will need.
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