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Intel Working On Thunderbolt Security Levels For Linux, Firmware Updates

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  • Zan Lynx
    replied
    I want to point out that USB-C by itself does not support DisplayPort or Thunderbolt. What it does support is alternate modes, which lets OTHER systems use the USB-C port for their data streams.

    If you have a USB-C add-in card, it won't do anything but USB. It may have internal ports for connecting DP or Thunderbolt, but that isn't required.

    USB-C built in to a laptop will most likely have everything else the laptop supports wired in.

    USB-C built into a desktop board will likely only provide DisplayPort video from the integrated GPU. It might support copying the frame buffer from a discrete GPU, like Optimus does.

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  • carewolf
    replied
    Originally posted by RussianNeuroMancer View Post
    Can you connect three FHD displays or couple of 4K by using only USB-C? At 60 Hz (or more) of course.
    USB-C switches to displayPort protocol and so do ThunderBolt unless you have a rare ThunderBolt monitor, so it depends on the DisplayPort standard supported by your GPU and monitor.

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  • RussianNeuroMancer
    replied
    Originally posted by carewolf View Post
    If not you are just using DisplayPort which USB-C already fully supports without help from ThunderBolt.
    Can you connect three FHD displays or couple of 4K by using only USB-C? At 60 Hz (or more) of course.
    Last edited by RussianNeuroMancer; 24 May 2017, 12:49 AM.

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  • carewolf
    replied
    Originally posted by RussianNeuroMancer View Post
    I have couple of tablets with Thunderbolt (Dell 5855 and Dell 9250). And as far I can tell Thunderbolt-based docks (like Dell TB16) is more useful than USB3.1-based docks (like Dell WD15). With Thunderbolt you can connect more displayes with higher resolution and/or refresh rate.
    Do you have Thunderbolt3 displays? I only thought one existed. If not you are just using DisplayPort which USB-C already fully supports without help from ThunderBolt.

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  • nils_
    replied
    Originally posted by Zan Lynx View Post
    Intel has 40 Gbps Ethernet which I'm told is essentially Thunderbolt masquerading as Ethernet, although I'm not sure if you can connect one to a Thunderbolt port. It's all ridiculously high speed serial data transmission.
    Actually it's not related to Thunderbolt at all. The connector used here is called QSFP+ which allows different types of transceivers (for fiber or electrical). It might be possible though to implement fast networking over Thunderbolt similar to IPoIB (IP over Infiniband).

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  • torsionbar28
    replied
    So many creative new ways to get PCI-E outside of the box. ExpressCard, NVMe M.2, Thunderbolt, who knows what's next.

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  • starshipeleven
    replied
    unapproved post for Zan Lynx above.

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  • starshipeleven
    replied
    Originally posted by Zan Lynx View Post
    Nice that you just skip over the Razer Core I mentioned, which can accelerate any laptop with Thunderbolt.
    Because there are similar PCIe boxes since a long while, I don't care of yet another thunderbolt box to add to the list of pricy crap I won't buy because I have nowhere to plug it.
    http://magma.com/products/thunderbolt-expansion/
    https://www.akitio.com/expansion/thunder2-pcie-box (these guys also have a thunderbolt 3 version)
    http://www.onestopsystems.com/desktop-pcie-enclosures
    And this ancient box from MSI back in 2012 http://www.anandtech.com/show/5352/m...ia-thunderbolt that appears to work only if you reboot into Windows.
    Those boxes have largely been Apple-only and pretty damn rare even for them as most gamers and people needing a very powerful GPU are not on Apple.

    I was talking of PCs with thunderbolt. I can't use thunderbolt-pcie expansion boxes without a PC with thunderbolt port.

    Afaik Thunderbolt is pretty damn rare in laptops (where it matters most), I know only a handful of devices supporting it (Apple excluded, they have another handful). And in either case the CPU sucks balls while the price of the laptop/tablet is very high. If it's more cost-effective to get a powerful desktop and a good midrange laptop, I see no point in jumping through all these hoops.

    Given current state of affairs, it's much easier to find a laptop with SSD-grade M.2 and use that to connect an external card.
    M.2 ports used for SSDs are nowadays PCIE 3.0 x4 (plus other unused stuff). You can place a simple passive card that pipes the connection in a pcie base where you can connect the GPU (and PSU for it) http://www.hwtools.net/Adapter/PE4C%20V4.1.html

    The main issue in this case is actually finding someone selling that stuff (only a couple sites from taiwan sell the M.2 version). Most sell far simpler M.2 to PCIE x4 connectors like this http://www.bplustech.com/ExtenderBoard/P4SM2.html
    Last edited by starshipeleven; 21 May 2017, 07:42 AM.

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  • RussianNeuroMancer
    replied
    Originally posted by carewolf View Post
    Given Thunderbolt devices are rare underperforming overpriced mythical beings, it is probably safer to just disable Thunderbolt completely than trusting Intel.
    I have couple of tablets with Thunderbolt (Dell 5855 and Dell 9250). And as far I can tell Thunderbolt-based docks (like Dell TB16) is more useful than USB3.1-based docks (like Dell WD15). With Thunderbolt you can connect more displayes with higher resolution and/or refresh rate.

    Leave a comment:


  • Zan Lynx
    replied
    Originally posted by starshipeleven View Post
    Outside Apple devices they are. There is a handful of devices with that port. Even Apple does not use thunderbolt in all their PCs.
    Nice that you just skip over the Razer Core I mentioned, which can accelerate any laptop with Thunderbolt.

    Leave a comment:

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