HDMI 2.0 vs HDMI 1.4: What Is the Difference?

HDMI 2.0 vs HDMI 1.4 is the step from 10.2 Gbps to 18 Gbps of video bandwidth, which takes 4K from 30 frames per second to 60. HDMI 1.4 arrived in 2009 and added 4K, 3D and an Ethernet channel to HDMI. HDMI 2.0 followed in 2013 and kept the same TMDS signaling, but ran it faster, raising the maximum clock from 340 MHz to 600 MHz.

Both versions use the same connector, so the difference is in the electronics at each end. A 4K source and a capture card or display must both support HDMI 2.0 to run 4K at 60 fps; if either side is HDMI 1.4, the link falls back to 4K at 30 fps or a lower resolution. HDMI 2.0 is backwards compatible, so mixing versions never stops a picture appearing, only limits it.

The 4K figures need one clarification. Consumer 4K, or UHD, is 3840 × 2160, which HDMI 1.4 carries at up to 30 Hz. Cinema 4K, at 4096 × 2160, is limited to 24 Hz on HDMI 1.4. HDMI 2.0 carries both at up to 60 Hz, which is what most 4K cameras and displays now default to.

The figures are specification maximums; a given device may support less.

HDMI 2.0 also added 4:2:0 color at 4K, which lets 4K at 60 Hz fit in less bandwidth. For full-colour 4:4:4 at 4K and 60 Hz, HDMI 2.0 is the minimum.

For video capture and AI on camera feeds, 60 frames per second instead of 30 means smoother 4K and twice as many frames per second for a detection or tracking model to work with. Fast-moving objects cross fewer pixels between frames, so the model has a better chance of following them.

Moving capture to HDMI 2.0 was part of the upgrade in our drone detection case study, where an SC710N1 M2 HDMI2.0 card captures 4K60 with lower latency. Our HDMI 2.0 capture cards list the supported resolutions and frame rates for each card. For sources beyond 4K at 60 Hz, see our HDMI 2.0 vs HDMI 2.1 guide.

HDMI cables are graded by tested bandwidth, not by version number. A High Speed HDMI cable, the grade sold in the HDMI 1.4 era, is tested to 10.2 Gbps. HDMI 2.0 at full 18 Gbps needs a cable certified to that rate, which carries a certification label you can check. Many older High Speed cables carry 4K at 60 Hz over short runs, but at longer lengths they are often the reason a link drops back to 30 Hz.

At 18 Gbps, passive cables are typically reliable to around 5 m. Longer runs need active cables or video extenders.

HDMI 1.4 is remembered for 4K, but it added several features that HDMI 2.0 kept unchanged:

Because both versions share a connector, the only way to know what a link is doing is to check it. On the source, the display settings show the resolution, refresh rate and color format actually sent. On a capture system, the card’s driver or utility shows the incoming signal, which is the quickest way to confirm a camera is delivering 4K at 60 Hz rather than 30. If the link settles lower than expected, swap the cable first, then check that every device in the chain, including any switch or splitter, supports HDMI 2.0.

Watch the color format too. A link that reports 4K at 60 Hz in 4:2:0 is running within HDMI 1.4-class bandwidth; full 4:4:4 at 4K and 60 Hz confirms an HDMI 2.0 link at full rate.

HDMI 1.4 remains common on embedded boards, industrial monitors and older cameras, and it is enough wherever the source is 1080p: 1080p at 60 Hz uses well under half of its bandwidth. Digital signage at 1080p, HMI screens and many industrial cameras sit comfortably within it.

It becomes the bottleneck when a 4K source, a 4K display or a high frame rate enters the system. If a project may move to 4K cameras or screens during its life, specifying HDMI 2.0 inputs and outputs from the start costs little and avoids replacing capture hardware later.

We fit HDMI 2.0 capture cards in edge AI and industrial computers as standard, install the drivers and validate each input at your camera’s resolution and frame rate before the system ships.