3 ms·

I expect the lack of HDMI 2.1 is bandwidth related. Full-bandwidth HDMI 2.1 is 48Gbps but Thunderbolt 4 is "only" 40. I'm not sure if they still do, but at one

I expect the lack of HDMI 2.1 is bandwidth related. Full-bandwidth HDMI 2.1 is 48Gbps but Thunderbolt 4 is "only" 40. I'm not sure if they still do, but at one point each pair of Thunderbolt ports shared a bus, so you could have something on the left running at 40Gbps and something on the right running at 40Gbps, but not two things on one side. If that's still the case, the SD card slot and the HDMI port are probably sharing bandwidth with the one Thunderbolt port on that side of the machine.

rz2k 5y ago
That's an interesting point. What interface do they use for the integrated display? It looks like there are multiple sets of chips involved in the physical ports for Thunderbolt or USB depending on what is connected.