News USB4 combines USB 3.2, Thunderbolt

Discussion in 'Article Discussion' started by bit-tech, 5 Mar 2019.

  1. bit-tech

    bit-tech Supreme Overlord Lover of bit-tech Administrator

    Joined:
    12 Mar 2001
    Posts:
    3,676
    Likes Received:
    138
    Read more
     
  2. David

    David μoʍ ɼouმ qᴉq λon ƨbԍuq ϝʁλᴉuმ ϝo ʁԍɑq ϝμᴉƨ

    Joined:
    7 Apr 2009
    Posts:
    18,369
    Likes Received:
    7,027
    Is that correct? Dual lane is 20Gb/s and TB3 uses four lanes for 40Gb/s. I spent a lot of time searching for a longer full bandwidth TB3 cable and encountered hundreds claiming to be just that until you dig down to discover they are "only" 20Gb/s cables.
     
  3. edzieba

    edzieba Virtual Realist

    Joined:
    14 Jan 2009
    Posts:
    3,909
    Likes Received:
    591
    The interesting part is only going to come when the actual spec is available, and we can tell whether this supersedes USB 3.2 (host Thunderbolt/DP/HDMI alternate modes supported-but-optional parts of the protocol) or operates in parallel as a 'high end' spec - basically replacing Thunderbolt 3 - to allow simplified branding of "USB 4 port is best USB port".
     
  4. Gareth Halfacree

    Gareth Halfacree WIIGII! Lover of bit-tech Administrator Super Moderator Moderator

    Joined:
    4 Dec 2007
    Posts:
    18,053
    Likes Received:
    8,119
    No, no it is not: it's the result of my misreading the, in my defence very badly phrased, following line:
    The fact the "using existing USB Type-C cables" is referred to by number of lanes and the "over 40Gbps-certified cables" is referred to by speed totally confuzzled my brain: in actual fact, they're saying you'll get 20Gb/s (or 10Gb/s, if you're not on USB 3.2 Gen 2x2) using two lanes on existing USB cabling and 40Gb/s requires new cables which are, presumably, four-lane and may or may not be any different to Thunderbolt 3 four-lane cables.

    I'll go fix, ta!
     
  5. David

    David μoʍ ɼouმ qᴉq λon ƨbԍuq ϝʁλᴉuმ ϝo ʁԍɑq ϝμᴉƨ

    Joined:
    7 Apr 2009
    Posts:
    18,369
    Likes Received:
    7,027
    Wow, that was poorly phrased - you'd think they would try harder, given it's their job to promote it.
     
  6. perplekks45

    perplekks45 LIKE AN ANIMAL!

    Joined:
    9 May 2004
    Posts:
    7,680
    Likes Received:
    2,040
    It did what it was supposed to do: confuse matters to make marketing easier. Can't break a promise you never made.
     
Tags: Add Tags

Share This Page