From Newsgroup: comp.sys.mac.system
In message <
0001HW.25ED2CA90058254F30983538F@News.Individual.Net> Leo <
leoblaisdell@sbcglobal.net> wrote:
On 2021 Feb 28, , Lewis wrote
(in article <slrns3n7o1.1eel.g.kreme@m1mini.local>):
What? All Macs with TB3 that are running Big Sur are compatible with
USB-4 and the so-called "Thunderbolt 4". Any TB3 cable on a Big Sur Mac
is also compatible with USB-4. Not all USB-C cables are Thunderbolt 3, of course.
All this newfangled nomenclature! And I got it wrong. Whatever Thunderbolt displays use to connect to the little oblong ports in the new Mini is what I got to plug in the display.
And that could be a USB-C to USB-C cable, and HDMI to USB-C, a Display
Port to Thunderbolt, or several other possible combinations.
and a USB to USB4 cable
What is a USB to USB-4 cable?
Duck lips to the little oblong hole port. I used the two provided duck lips ports on the new Mini for the keyboard and mouse and the duck lips to oblong port adaptor to run my old duck lips Time Machine drive. It turns out that I like saying duck lips, and both adaptors were useful/needed for the way I upgraded.
I have no idea what you are talking about, but you seem to be confusing
several different things.
There are USB-A USB-B and USB-C PORTS and CONNECTORS (and some
variations of USB-A and USB-B). USB-A is the most common connector and
port, and is good up to 10Gps connections, I believe, but most USB-3
(and possibly all USB-A connectors?) devices max out at 5Gbps. USB-B is
used for things like printers, cameras, kindle charger ports, and such.
USB-C is a smaller connector and is (finally) reversible. It can carry
up to 40Gbps and Display Port video and basically anything at all,
including PCI bus).
There are also various USB standards for connectivity and speed, given
various changing and confusing names over the ears, but generally called
by real people USB 1 (really 1.1) USB 2, USB 3, USB 3.2 and the new USB 4.
The USB moron cleverly renamed everything "USB 3" last year, causing
nothing but confusion and chaos, as was their intention.
There are also three types of Thunderbolt. -1 and -2 use the Mini-Display
port connector, and TB-3 uses the USB-C connector.
Thunderbolt 3 is NOT the same as USB-3, despite using the same
connector, but TB-3 carries USB as well. Confuses yet? So is everyone
else.
Thunderbolt 3 *on the Mac* has always supported all of the features of
TB-3, unlike TB-3 on Wintel machines which generally only support
random-ish subsets of TB-3, leading to much more confusion than normal especially when you thrown USB into the mix.
Big Sur Macs with TB-3 ports have been upgraded to support the full spec
of USB-4.
USB-4 is Thunderbolt 3 with FULL support for all features required
(ending the bullshit on windows) as well as some new features, most
prominently supporting hubbing for USB-4.
So, I have a USB-4 hub which plugs into a single USB-C port on my
computer and provide 3 "downstream" USB-C ports, all of which are fully Thunderbolt 3 compatible.
"Thunderbolt 4" is a marketing term for Windows machines that finally
support all of Thunderbolt 3's feature to distinguish them from the
previous machines with only limited and partial support.
TB-3 is compatible with TB-1 and TB-2 devices, but you will need a
dongle to account for the MDP connector. I currently have a TB-2 disk
array (an old Drobo) connected to a USB-4 hub with a TB-2 to TB-3
adaptor.
--
My mind is going. There is no question about it. I can feel it. I can
feel it. I can feel it. I'm... afraid.
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