Dual 1080p monitors of single USB-C bank

[tpivette89]

I know Apple recommends running one 4k monitor on each bank of USB-C ports, but due to less demand, can a pair of 1080p monitors be run off the same channel of USB-C ports, thus saving the other pair to drive an eGPU with full bandwidth?

Has anyone done this and if so, what were the results?

 

[rmdeluca]

I know Apple recommends running one 4k monitor on each bank of USB-C ports, but due to less demand, can a pair of 1080p monitors be run off the same channel of USB-C ports, thus saving the other pair to drive an eGPU with full bandwidth?

Yes. Note though that your eGPU is only using 22Gb/s of the 32Gb/s available over 4 PCIe 3.0 lanes. You can run a 1080p monitor on the second port of whichever controller is running the eGPU without reducing its bandwidth. For reference, I have one of the inputs of my 3440x1440 monitor connected to the other port on the controller the eGPU is connected to.

 

[tpivette89]

Thanks for the info!

So far, I have a Dell 27" 1080p monitor and a AKiTiO 3.1 dual storage bay running of one pair of the USB-C ports, and another Dell 27" monitor running off the other pair (just one port occupied). The last port will be occupied by an eGPU when I'm ready for the upgrade.