What, specifically, does this imply for the number of external displays one can attach to a raspberry pi 4 ? Naively, you might think that with 2x USB-C ports,

What, specifically, does this imply for the number of external displays one can attach to a raspberry pi 4 ? Naively, you might think that with 2x USB-C ports, you could attach two of these: Cable Matters 201055 – 2x DisplayPort, power, ethernet, 2x USB2 ... and also attach something to each of the onboard HDMI port and have a total of six monitors. However, I don't think that's the case because of something-something-video lanes/memory/bios something-something ... Does anyone have a finer grained understanding ? EDIT: I am reminded that this post[1] discusses an alternate route using the CM4 and the pcie port on the breakout board ... and failing to succeed in using a pci graphics card. USB3 monitors seem a more promising avenue but, again, I think there is some memory/BAR limitation ... [1] https://www.jeffgeerling.com/blog/2020/external-gpus-and-raspberry-pi-compute-module-4 https://www.jeffgeerling.com/blog/2020/external-gpus-and-ras...