From the statement "‌Mac mini‌, it can support up to 4K resolution at 240Hz ove‌r HDMI", I think it has to be 2.1 as 2.0b can't do that even with DSC. However, it sounds like there is a caveat with the total amount of video output bandwidth the GPU can support, probably around the HDMI 2.1 limit of 42.6 GBit/sec. But for 1440p at 144/165hz + HDR, HDMI 2.0 is fine. Also some 1440p HDMI 2.1 monitors might be able to accept a 4k 120hz signal and down convert it to the panel's native 1440p resolution. This could be useful if you are planning to use a monitor with devices that only offers 4k or 1080p like the PS5. ViolentOmega. • 3 yr. ago. I use high quality HDMI 2.0 cables from Blue Jeans Cables and get 4K120 HDR 4:4:4 no problem. I have a cable I bought back in 2012 and it can do 4k 120hz. I was using 2.0a cable on my C2 via 4080 and gaming 120hz 4K HDR. Just recently I saw a post about 2.1 cables so I have ordered one just to be assured. It was designed as a quick fix update to HDMI 1.3, with support for 4K in 30Hz and no HDR. Then a massive step up arrived with HDMI 2.0, which nearly doubled bandwidth to 18Gbps. That allows for 4K 60Hz (or 60 frames per second) plus HDR metadata. It’s why HDMI 2.0 was so effective in popularizing 4K HDR video and importantly 4K HDR gaming. To connect a PC or laptop to one monitor only, and the monitor has both a DisplayPort and HDMI input, use either. DisplayPort might be best as it is optimized for PC use. To connect a PC or laptop to a TV, where the TV only has HDMI inputs, and where the PC has an HDMI output, use that option. If the PC or laptop only has a DisplayPort output HDMI 2.1 has no problem natively supporting 4K@144 with full 4:4:4 color space. You also get 'Quick Frame Transport', 'Quick Media Switching', and if you have HDMI2.1a you also get extra goodies in the form of dynamic HDR support. EDIT: Anything with HDMI2.1 will likely have DP1.4 as well. The HDMI cable: An HDMI cable is a two-ended connector. It can be of many types such as Type-A, Type-B, Type-C depending on the structure. But what we are mainly looking for is the bandwidth of data it supports. For watching true 4K and HDR in your VIZIO TV from an external 4K HDR source such as a BluRay player, the HDMI 2.0a cable should be used. It also improves the HDMI feature set, adding support for dynamic HDR metadata, an enhanced audio return channel, variable refresh rates, auto low latency mode, and quick media switching, among others. Should you get HDMI 2.1? HDMI 2.1 is very much a future-proof connection, enabling the best resolutions and refresh rates of today and tomorrow. JoSZHr.