Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

pksv

macrumors regular
Mar 12, 2024
207
441
Does USB4 mean that Thunderbolt4 is automatically supported?
Not exactly, unfortunately, it's a mess now after Intel open-sourced TB4, USB4 is also a mess.
You can watch this:

I am trying to make sense of the statement that "... testing with a 16-inch M1 Pro MacBook Pro I saw both read and write speeds registering around 3,100 MB/s..." since my understanding is that the MacBook Pro line is limited to 10Gb/sec with USB, which means that 1,250 MB/s is the theoretical maximum (3,100 MB/s is about 24.8 Gb/s, against a theoretical 10 GB/s limit for USB and 40 GB/s limit for T3 and T4).
40Gbps is the total USB4/TB4 bandwidth, part of it is reserved for display.
Around 3200 MB/s read/write is maximum for USB4/TB4 and 900-1000 MB/s is maximum for USB3.2 .
There is also USB3.2 Gen2 2x2 (20Gbps) but it's not supported on Macs.
 
  • Love
Reactions: Michael4Mac

Michael4Mac

macrumors newbie
Dec 13, 2022
5
0
is there a good dock/hub that just has 4 USB-C ports? That’s all I need/want.
I'm still not clear on the overlap between USB and Thunderbolt 4, but Belkin has a "Connect Thunderbolt 4 5-in-1 Core Hub" ($200) that has 3 USB-C in and one USB-C out-to-computer (as well as one blue USB-A, presumably USB 3.2).
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.