M1 的两个 USB4 是共享带宽的吗? - V2EX
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ZRS
V2EX    Apple

M1 的两个 USB4 是共享带宽的吗?

  •  1
     
  •   ZRS Dec 2, 2020 4992 views
    This topic created in 1983 days ago, the information mentioned may be changed or developed.

    总能看到这样的说法,但是看拆机是有两颗独立的 tb3 的芯片的

    截屏

    那么目前有两个口同时跑满的测试吗?是否能够独立跑满 40Gbps ?

    12 replies    2020-12-04 09:15:16 +08:00
    xupefei/td>
        2
    xupefei  
       Dec 3, 2020
    能独立跑满 40Gbps 的话就能接两个 5K 显示器了。
    byicer
        3
    byicer  
       Dec 3, 2020
    拆机视频来一发?
    baleeny
        4
    baleeny  
       Dec 3, 2020   1
    所以到底是不是共享带宽,有没有大佬发个权威点的
    alexnone
        5
    alexnone  
       Dec 3, 2020
    目前看其他人测下来雷电 3 速度比之前确有下降,我是严重怀疑共用的。
    oktony
        6
    oktony  
       Dec 3, 2020
    不知道以后会不会出对应的 USB4 扩展坞
    wyfyw
        7
    wyfyw  
       Dec 3, 2020
    @oktony M1 这个虽然叫 USB,但是不支持 USB 3.2 gen2 2x2 (20Gbps)
    BingoXuan
        8
    BingoXuan  
       Dec 3, 2020
    是共享的,第一版 soc 都不做那多 io 出,雷要 x8 的 pcie ,nvme 也要 x4 了,卡起要 x1 吧,七八糟加起要 x16 了
    savebox
        9
    savebox  
       Dec 3, 2020
    @byicer 应该是这个
    ZRS
        10
    ZRS  
    OP
       Dec 4, 2020
    @wyfyw
    @xupefei
    @baleeny
    @alexnone
    @oktony
    @wyfyw
    @BingoXuan

    https://eshop.macsales.com/blog/68484-thunderbolt-on-the-m1-mac-mini/
    我找到了一篇文章 按照这哥们的说法 M1 Mac 是有着两条独立的雷电总线 都可以跑到 40Gbps
    baleeny
        11
    baleeny  
       Dec 4, 2020 via Android
    @ZRS 那就很 nice 了
    BingoXuan
        12
    BingoXuan  
       Dec 4, 2020
    @ZRS
    那估新的 mbp16 有 4 立 USB4 了,M1 的 IO 拓展性是很害啊
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