Does anyone know or has tried their recent macbook pro with dells 8k (7680 x 4320) display at 60hz (UP3218K)?
Pixel bandwidth might not be a limiting factor:
- We know it supports 2 x 5k @ 60hz displays. [1]
- Those displays each use a single usb-c thunderbolt-3 port which itself contains two displayport-1.2 signals. [2]
- Displayport-1.2 is capable of 17.28 gbit/s, so four of these (two cables, each with two signals) theoretically supports up to 69.12 gbit/s. [3]
- An 8k @ 60hz runs at 49.65 gbit/s, clearly less than two of these cables at max bandwidth. [3]
- However, 8k @ 60hz does require 7% more throughput than two 5k @ 60hz displays, so that's still an unknown but we have a chance here.
My chief concern is the port connectivity:
- As mentioned a single usb-c thunderbolt-3 port on the macbook pro has two displayport 1.2 signals.
- But Dell's monitor and Philip's upcoming monitor in next 3-8 months both have two displayport-1.3 ports. [4]
- I doubt we can connect one usb-c / two displayport1.2s into one displayport1.3. And then repeated again for the other half. Or shown explicitly:
- laptop_usbc0_displayport1.2+displayport1.2 -> monitor_displayport1.3_0
- laptop_usbc1_displayport1.2+displayport1.2 -> monitor_displayport1.3_1
So it seems like some sort of intermediate conversion would be needed to make that work.
There are adapters cables on amazon that convert usb-c to displayport, but they all state a max display of 4k@60hz. And furthermore, my concern is that a single cable needs to combine both displayport1.2 signals into one displayport1.3 result before it is provided to the monitor. Existing cables I see on amazon dont mention dealing with these complexities.
I do see an adapter (107006-BLK by Cable Matters) that acknowledges the dual displayport1.2 nature of the the MBPs usb-c thunderbolt3 port, but it converts that into two separate displayport1.2 outputs, whereas I would need them as a displayport1.3 output to drive the dell 8k display.
References / Notes:
[1] https://www.apple.com/macbook-pro/specs/ (15-in section)
[2] https://en.wikipedia.org/wiki/MacBook_Pro
[3] https://en.wikipedia.org/wiki/DisplayPort
[4] Displayport1.3 and 1.4 have the same max throughput but displayport1.4 adds compression which isnt supported by the MBP anyway.
Pixel bandwidth might not be a limiting factor:
- We know it supports 2 x 5k @ 60hz displays. [1]
- Those displays each use a single usb-c thunderbolt-3 port which itself contains two displayport-1.2 signals. [2]
- Displayport-1.2 is capable of 17.28 gbit/s, so four of these (two cables, each with two signals) theoretically supports up to 69.12 gbit/s. [3]
- An 8k @ 60hz runs at 49.65 gbit/s, clearly less than two of these cables at max bandwidth. [3]
- However, 8k @ 60hz does require 7% more throughput than two 5k @ 60hz displays, so that's still an unknown but we have a chance here.
My chief concern is the port connectivity:
- As mentioned a single usb-c thunderbolt-3 port on the macbook pro has two displayport 1.2 signals.
- But Dell's monitor and Philip's upcoming monitor in next 3-8 months both have two displayport-1.3 ports. [4]
- I doubt we can connect one usb-c / two displayport1.2s into one displayport1.3. And then repeated again for the other half. Or shown explicitly:
- laptop_usbc0_displayport1.2+displayport1.2 -> monitor_displayport1.3_0
- laptop_usbc1_displayport1.2+displayport1.2 -> monitor_displayport1.3_1
So it seems like some sort of intermediate conversion would be needed to make that work.
There are adapters cables on amazon that convert usb-c to displayport, but they all state a max display of 4k@60hz. And furthermore, my concern is that a single cable needs to combine both displayport1.2 signals into one displayport1.3 result before it is provided to the monitor. Existing cables I see on amazon dont mention dealing with these complexities.
I do see an adapter (107006-BLK by Cable Matters) that acknowledges the dual displayport1.2 nature of the the MBPs usb-c thunderbolt3 port, but it converts that into two separate displayport1.2 outputs, whereas I would need them as a displayport1.3 output to drive the dell 8k display.
References / Notes:
[1] https://www.apple.com/macbook-pro/specs/ (15-in section)
[2] https://en.wikipedia.org/wiki/MacBook_Pro
[3] https://en.wikipedia.org/wiki/DisplayPort
[4] Displayport1.3 and 1.4 have the same max throughput but displayport1.4 adds compression which isnt supported by the MBP anyway.
