...all USB 3 and the USB port on my Tower is USB 3.
@bob466 :-
Heh. Oh, if ONLY it were that "simple", mate.
USB 1.0 & USB 2.0 were relatively straight-forward. Apart from the upgrade to "Superspeed" during the early part of USB 2.0's lifespan, everything was fairly predictable.
- USB 1.0 - max transfer rate was 12 MB/sec
- USB 2.0 - we all knew max transfer rate was pegged at 480 MB/sec. No ifs or buts. Rarely achieved in real-life, but theoretically possible, of course....
And THEN
USB 3.0 arrived. With the exception of "Gen 1" - the early release - which gave a theoretical max transfer rate of
5GB/sec, everything rapidly went to hell in a handbasket!
en.wikipedia.org
There was a slew of rapidly updated specifications; several in fact.....over the course of only about 4 months.
- USB 3.1 - also known as "USB 3.1 Gen 2" and "Gen 2x1" - upped that theoretical 'max' to 10GB/sec
- USB 3.2 - When this arrived, things got REAL complicated.....fast. We had modes such as "1x1", "1x2", "2x1", and "2x2" (??!?)....some of these replacing former labels for older implementations, along with denoting whether half-duplex OR full-duplex, single OR dual transfer 'lane' protocols were in use and/or supported. Top & bottom, the max possible transfer rate doubled again, this time to 20GB/sec.
And then "
USB 4.0" arrived.....bringing with it theoretical data transfer rates of up to
40GB/sec, and the soon-to-be ubiquitous USB-C connector, along with Thunderbolt support.....IF the manufacturer chose to implement it! Under certain rare combinations of highly-specific conditions, I believe figures of
80GB/sec have been bandied about....
And all that through a plug-in connector.
Goes without saying; all ports/interfaces/cables and chipsets, etc, need to "match" to achieve these insanely high speeds. But as for trying to figure out what you have, and what you might achieve......forget it. Only someone with a post-grad MEng doctorate could possibly make sense of that lot!!
IMHO, the USB Implementer's Forum need their arses kicking. HARD.
Mike.
