Computex: Powercolor Shows External Thunderbolt 3 GPU Gaming Box

Discussion in 'Frontpage news' started by Hilbert Hagedoorn, May 29, 2017.

  1. Hilbert Hagedoorn

    Hilbert Hagedoorn Don Vito Corleone Staff Member

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  2. Fox2232

    Fox2232 Ancient Guru

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    If they added USB 3.1 gen 2, it would be popular product.
    Yes, bandwidth of Thunderbolt is now 4 times higher. But it would still be great upgrade for many.
    (And people are using external GPU boxes through PCIe 2.0 x1 interface in their notebooks which has half the bandwidth of USB 3.1 gen 2.)
     
  3. Pawel04

    Pawel04 Active Member

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    Correct me if wrong but i believe that Thunderbolt 3 includes USB 3.1 gen 2 as part of its super set?
     
  4. Fox2232

    Fox2232 Ancient Guru

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    Thunderbolt 3 is Thunderbolt, not USB, not PCIe, not DisplayPort.

    Thunderbolt 3 is capable to deliver 20Gbps on passive cable, and 40Gbps on active cable.
    If Thunderbolt device on other side of cable supports given feature (usually docking stations) then you get to use mentioned DisplayPort, USB.

    Regular USB-C port pinout has 2x USB 3.0 channels in reversible order + 2x USB 2.0 in reversible order.
    But from Pinout vs Bandwidth... When USB-C connector is used for Thunderbolt 3, there are not pins dedicated to USB communication. USB/PCIe/DP communication eats form those 20/40Gbps interface has. And has to be supported by chip at end of cable.
    (Apparently Thunderbolt 3 chips in case of docking station having DP + USB + PCIe. Or dedicated DP or USB interface on regular device.)

    And that sadly means This Thunderbolt 3 device will not work with current computer with regular USB 3.1 gen 2 (USB-C) port.
    But Thunderbolt 3 equipped PC can use this port to connect mentioned DP/PCIe/USB as signaling/negotiation=>protocol selection works.

    In other words Thunderbolt 3 Chip in your PC is supposed to be backward compatible. Thunderbolt 3 Chip in your device is not.
     

  5. Sweeeper

    Sweeeper Member

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    uhh thunderbolt

    the lack of intel gfx laptops makes this product useless.
    www ultrabookreview com / 10579-laptops-thunderbolt-3

    with usb 3 (10gbps) could it use a pci 3.0 x8... would be perfect.
     
  6. Pawel04

    Pawel04 Active Member

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    I see, thanks for the clarification. Still trying to get my head around all the specifications regarding Thunderbolt vs USB
     

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