The problem with HDMI 2.1 is that it detects 4K120 as NATIVE resolution, so any DSR factors are 120hz. However, DisplayPort 1.4 detects 1440P240 as NATIVE resolution, so all DSR factors are also 240hz which means with HDMI 2.1, you can only do 4K120, but with DisplayPort, you can do 4K240 using DSR. HDMI has been carrying pictures and audio from source to receiver since its inception in 2004. But when ARC launched in 2009, it opened up HDMI to sending audio both ways – known as DisplayPort sends video and other data to an output device. HDMI is an interface for audio and video. DisplayPort is defined as a digital audio and video interface used to connect a display device such as a computer monitor or projector to a data source such as a CPU. DisplayPort comes in two varieties: standard and the smaller Mini DisplayPort. No, there are actually only 3 categories that you should be aware of; Standard, Highspeed and Premium. Standard HDMI Cable - is perfectly suited to support resolution outputs such as Sky HD 1080i 50 Hz 8-bit 4:4:4. Highspeed HDMI Cable - is guaranteed to deliver 3G 10.2 Gbps video transmission or resolutions such as 4K UHD 60 Hz 8-bit 4:4:4. From HDMI 1.0 to the latest HDMI 2.1, each version brought with it improvements in audio-visual quality, increased bandwidths, and support for emerging technologies like Dynamic HDR and eARC.

HDMI started in 2004. It quickly took over as a single cable solution and on all TVs. All you need to know is that it has versions 1.0, 1.1, 1.2, 1.3a, 1.4, 1.4a, 1.4b, 2.0, 2.0a, 2.0b and now 2.1. HDMI devices and cables are backwards compatible to the extent that earlier versions simply do not support latter features.

On modern displays, you could find: HDMI 1.4: Supports video resolution up to 4K (4096 x 2160 pixels) at 24 Hz, 4K (3840 x 2160 pixels) at 30 Hz, and has a bandwidth of 10.2 Gbps. HDMI 2.0: Supports video resolution up to 4K at 60 Hz with later versions including HDR capabilities, and has a bandwidth of 18 Gbps. cqGdp.
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    • difference between hdmi and hdmi 2.1