I'm confused about HDMI 1.4

[unplanned bacon]

If HDMI 1.4 can only do 4K30 max, why is my GTX 780 doing a solid 4K62 on Rocket League, max settings?

 

[Dark Lord of Tech]

https://www.cnet.com/news/4k-hdmi-cables-are-nonsense/

 

[TMTOWTSAC]

No personal experience, but I've read it's actually because Nvidia gets around the 1.4 limitation by switching to 4:2:0.

http://www.pcgamesn.com/get-hdmi-4k60hz-nvidias-new-drivers-theres-catch

 

[unplanned bacon]

https://www.cnet.com/news/4k-hdmi-cables-are-nonsense/

I read somewhere else (maybe it was that same link) that the number refers to the connection itself and not the cable. Is that true? I read that a 1.4 connection can only go 4K30 at best. Is that also not true?

 

[TMTOWTSAC]

https://www.cnet.com/news/4k-hdmi-cables-are-nonsense/

I read somewhere else (maybe it was that same link) that the number refers to the connection itself and not the cable. Is that true? I read that a 1.4 connection can only go 4K30 at best. Is that also not true?

The number indicates the standard, right. The cables for HDMI 1.4 and 2.0 are completely identical. Technically, 1.4 has a limit of 10.2 Gbps, not 4k@30Hz. By reducing the amount of color information being sent:

https://en.wikipedia.org/wiki/Chroma_subsampling

they save some bandwidth in order to increase the refresh rate. If I understand it correctly, they're piggybacking on a broadcast/blu-ray resolution as opposed to a normal computer resolution. Specifically 4:2:0, which is sort of like interlacing for color data.