For 4k at 120hz. 3840x2160 x 120hz = 995,328,000 pixels. 10K at 120hz is 5.3 times more pixels per second than 4k at 120hz. Even 4k at 240Hz gives us 1,990,656,000 pixels per second which is 2.67 times less than 10K at 120fps. Therefore, why doesn’t HDMI 2.1 version allow 4k at 240hz or 8k at above 120hz?
DisplayPort 2.1 also adds bandwidth management and mandated support for VESA's Display Stream Compression (DSC) and Panel Replay technologies. Furthermore, DisplayPort 2.1 certification requires DP40 and DP80 cables to operate at total capacity at lengths beyond 2m (6.6 ft) and 1m (3.3 ft), respectively. Although these additions do not increase
On ps5 you do need hdmi 2.1 for 1440p120hz. Ps5 still outputs a 4k120hz image and your tv/monitor will do the downscaling to 1440p. That is the only way to output 1440p on ps5. You need HDMI 2.1 to play at 120fps at 4K. HDMI 2.0 supports only 120fps at 1080p on PS5.
A cable designed for HDMI 2.0 will work fine on an HDMI 1.4 connection, and vice versa. That does change with HDMI 2.1, as all the additional bandwidth needs a new generation of high-end cables to best support it. But they aren't mandatory. If you're wondering, do I need HDMI 2.1 cables, then the answer is yes, but not necessarily straight away.
HDMI 2.1 is the new standard of this technology, capable of higher video resolutions up to 10K, and higher refresh rates than regular HDMI 2.0. These include being able to display 4K at 120Hz and
The new HDMI interface will support higher performance standards than the current interface, HDMI 2.0 (or 2.0b, to be more specific). In other words, the exciting features of tomorrow—120fps
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does hdmi 2.0 work with 2.1
