I have the XDR with the W5700X graphics card and wondering if the USB ports on the XDR will take advantage of USB 3.2 speeds or only 3.0?
Thank you and be well.
Thank you and be well.
USB 3.0 (5 Gbps). The XDR has an internal USB 3.0 hub to provide more than one USB 3.0 port.
I've never seen Apple or any display manufacturer use a USB 3.1 Gen 2 (10 Gbps) USB hub.
I don't know if macOS can handle USB 3.2 Gen 2x2 (20 Gbps) USB.
I don't think what I said disagrees with Apple. The original poster is talking about a W5700X which has Thunderbolt and supports DSC so he should get USB 3.0. The Apple tech specs for the XDR were written before the W5700X became available. It would be super strange if only the MacBook Pro 16 inch could use the ports as USB 3.0.This is not the case, according to Apple:
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Pro Display XDR - Technical Specifications
See the tech specs for the new Pro Display XDR including resolution, brightness, contrast, color, connectivity, and compatibility.www.apple.com
They are USB2 ports unless connected to a 16-inch MBP, when they work as USB 3.1 Gen 1 (5Gbps, = USB 3.0) ports.
ioreg -lw0
output as evidence for situation #2, #3, and #5 because I'm not 100% sure of those (maybe for situation #1 also to satisfy the XDR tech specs question ).I don't think what I said disagrees with Apple. The original poster is talking about a W5700X which has Thunderbolt and supports DSC so he should get USB 3.0. The Apple tech specs for the XDR were written before the W5700X became available. It would be super strange if only the MacBook Pro 16 inch could use the ports as USB 3.0.
Right. If the models from the compatibility list marked #1 below do support USB 3.0 as I guess, then the specs need fixing. I could be wrong.It would also be super strange if Apple didn't update their technical specs for a product they currently sell to reflect that ¾ of their laptops are capable of getting USB 3 speeds out of the box (along with certain configurations of their desktops) while at the same time adding them to the "compatibility" list on the same page.
Right. If the models from the compatibility list marked #1 below do support USB 3.0 as I guess, then the specs need fixing. I could be wrong.
The specs have been known to be inaccurate - for the Vega II, it says you can connect two XDR displays, but people have been able to connect three and get 6K 60Hz from each. The Use multiple displays with your Mac Pro (2019) page says you can only connect two XDR to the Vega II Duo but the Use the Radeon Pro Vega II Duo MPX Module with your Mac Pro page says you can connect 4.
- Mac Pro (2019) with MPX Module GPUs : #1 for W5500X and W5700X, #5 for 580X, Vega II, Vega II Duo
- 15-inch MacBook Pro (2018 or later) #5
- 16-inch MacBook Pro (2019) #1
- 21.5-inch iMac (2019) #5
- 27-inch iMac (2019 or later) #5
- MacBook Air (2020) #1
- 13-inch MacBook Pro with four Thunderbolt 3 ports (2020) #1
- Any Mac model with Thunderbolt 3 ports paired with Blackmagic eGPU or Blackmagic eGPU Pro #5
The Mac Pro 2019 tech specs says the W5700X supports DSC but does not mention that for W5500X.
If the W5500X and W5700X support DSC, then you should be able to connect two XDR displays to a single bus but Apple says to use one display per bus. With DSC, you can connect 6 XDR displays to the W5700X or two XDR displays to the W5500X and each one gets a HBR2 with DSC signal, but maybe the GPU doesn't like to drive that many pixels at 60 Hz with compression?
Maybe a GPU supports DSC but able disables it in certain situations? I believe there is a flag in the display overrides to do that.