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> Needs to filter whether it can show HDMI 4K at 30Hz or 60Hz. And related to that, for video, it’s possible to have 2 4K 60hz through or one or none. I don't

> Needs to filter whether it can show HDMI 4K at 30Hz or 60Hz. And related to that, for video, it’s possible to have 2 4K 60hz through or one or none. I don't think they'd bother, because none of these docks can do it. USB-C 3.1 inherently can't support a 4k@60hz display, due to bandwidth limitations. And it certainly can't run two of them. You'd have to jump up to a Thunderbolt 3 dock for that sort of thing.

wmf 7y ago
USB-C 2.0 can support 4K60 (see deep dive above) so you can drive one good monitor if you don't need fast network or storage.
- 867-5309 7y ago
  did you mean USB-C at USB 2.0 speeds? there is no standard by that name and Rev 2.0 does not mention video
Terretta 7y ago
The Thunderbolt capable docks on Amazon are still listed as USB-C because consumers seem to think it’s all about cable shape. That said, there are plenty of dual USB-C connector, dual HDMI 4K@60hz port, dongles designed for Mac on Amazon. I think this is the most recent addition: https://smile.amazon.com/gp/product/B07RH9HF4R/ https://smile.amazon.com/gp/product/B07RH9HF4R/ ”Satechi Aluminum Type-C Dual HDMI Adapter 4K 60Hz with USB-C PD Charging — Stunning dual HDMI display with a convenient USB-C PD port to keep your setup up and running - all in 4K 60Hz resolution. ENGINEERED FOR 4K DUAL DISPLAY - features dual HDMI ports to connect two monitors for stunning, extended 4K 60Hz display. Requires a direct HDMI connection, will not work with VGA, DVI or Thunderbolt displays...” By contrast, this is one HDMI 4K@60Hz and one HDMI 4K@30Hz: https://smile.amazon.com/Satechi-Multimedia-Adapter-Gigabit-Ethernet/dp/B07RH8L9GV/ https://smile.amazon.com/Satechi-Multimedia-Adapter-Gigabit-... Includes the two 4K HDMI ports of differing refresh rates, USB-C PD 3.0 charging, Gigabit Ethernet, micro/SD card readers, and USB 3.0 ports, and also will not work with Thunderbolt.
- chx 7y ago
  Two 4k @ 60 Hz is either Thunderbolt (which is fine for Macs but has a price and I would rather buy like https://www.monoprice.com/product?p_id=38575 https://www.monoprice.com/product?p_id=38575 or https://www.monoprice.com/product?p_id=31261 https://www.monoprice.com/product?p_id=31261 instead of a noname company) or DisplayLink which is to be avoided at all costs. This hub is Thunderbolt as can be deciphered from "Does not support MacBook models with single USB-C port" (see https://support.apple.com/en-us/HT201736#usbc https://support.apple.com/en-us/HT201736#usbc ) but the fact I need to decipher what it is a second strike against it. It seems lately Intel has loosened its iron grip on Thunderbolt 3 (after all, it handed the standard over to USB IF) so now everything goes (we see empty M.2 to TB3 enclosures and chaining eGPU boxes both of which were forbidden by Intel prior) but the fact they didn't include the trademarked name makes me go hm. Finally, it could be a DP 1.4 MST hub but that is very rare (the first USB C to DP 1.4 MST I am aware of was announced at CES 2020 https://plugable.com/2020/01/07/plugables-new-docking-station-and-adatpers-at-ces-2020-raise-the-bar-for-connectivity-power-and-productivity/ https://plugable.com/2020/01/07/plugables-new-docking-statio... and didn't ship yet) and figuring out support will be _very_ interesting. All Intel 14nm laptop CPUs are stuck with DisplayPort 1.2 and then researching which laptops with Radeon / nVidia GPUs run their USB C through those GPUs to provide DP 1.4 will be fun. Let's put 4k @ 60 (and then 4k @ 30) into the bandwidth calculator: https://linustechtips.com/main/topic/729232-guide-to-display-cables-adapters-v2/?section=calc&H=3840&V=2160&F=60&calculations=show https://linustechtips.com/main/topic/729232-guide-to-display... you can see you need more than what DP 1.2 can provide so everything I said above applies. Oh and of course if it's for a Mac, in general, you could just use two USB C plugs, I suspect that's what the 4k @ 60 + 4k @ 30 is: one plug is used in DP alt mode, the other is used in MFDP mode.
  - Terretta 7y ago
    It doesn’t support macs with a single port because it takes two ports, uses each one. That changes the bandwidth calculator math. This adapter was, I believe, also announced at CES 2020.
    - chx 7y ago
pzb 7y ago
You can do 3840x2160@60Hz (and 24bpp/8bpc) over USB Type-C on newer displays. DisplayPort Alt Mode over USB-C using DisplayPort 1.3/1.4 can support 4K + USB 3 Gen2 on one cable. https://www.amazon.com/UPTab-10Gbps-60hz-Power-Delivery/dp/B081QNHSJW https://www.amazon.com/UPTab-10Gbps-60hz-Power-Delivery/dp/B... is an example
- lxgr 7y ago
  Exactly. Apple also recently quietly updated their multiport adapter to do just that: https://support.apple.com/en-us/HT207806 https://support.apple.com/en-us/HT207806 Intel (GPU) Macs are notably not supported, unfortunately (due to supporting DisplayPort 1.2 only).
deleted 7y ago
[deleted]

wmf 7y ago

USB-C 2.0 can support 4K60 (see deep dive above) so you can drive one good monitor if you don't need fast network or storage.

867-5309 7y ago
did you mean USB-C at USB 2.0 speeds? there is no standard by that name and Rev 2.0 does not mention video

Terretta 7y ago

The Thunderbolt capable docks on Amazon are still listed as USB-C because consumers seem to think it’s all about cable shape. That said, there are plenty of dual USB-C connector, dual HDMI 4K@60hz port, dongles designed for Mac on Amazon. I think this is the most recent addition: https://smile.amazon.com/gp/product/B07RH9HF4R/ https://smile.amazon.com/gp/product/B07RH9HF4R/ ”Satechi Aluminum Type-C Dual HDMI Adapter 4K 60Hz with USB-C PD Charging — Stunning dual HDMI display with a convenient USB-C PD port to keep your setup up and running - all in 4K 60Hz resolution. ENGINEERED FOR 4K DUAL DISPLAY - features dual HDMI ports to connect two monitors for stunning, extended 4K 60Hz display. Requires a direct HDMI connection, will not work with VGA, DVI or Thunderbolt displays...” By contrast, this is one HDMI 4K@60Hz and one HDMI 4K@30Hz: https://smile.amazon.com/Satechi-Multimedia-Adapter-Gigabit-Ethernet/dp/B07RH8L9GV/ https://smile.amazon.com/Satechi-Multimedia-Adapter-Gigabit-... Includes the two 4K HDMI ports of differing refresh rates, USB-C PD 3.0 charging, Gigabit Ethernet, micro/SD card readers, and USB 3.0 ports, and also will not work with Thunderbolt.

chx 7y ago
Two 4k @ 60 Hz is either Thunderbolt (which is fine for Macs but has a price and I would rather buy like https://www.monoprice.com/product?p_id=38575 https://www.monoprice.com/product?p_id=38575 or https://www.monoprice.com/product?p_id=31261 https://www.monoprice.com/product?p_id=31261 instead of a noname company) or DisplayLink which is to be avoided at all costs. This hub is Thunderbolt as can be deciphered from "Does not support MacBook models with single USB-C port" (see https://support.apple.com/en-us/HT201736#usbc https://support.apple.com/en-us/HT201736#usbc ) but the fact I need to decipher what it is a second strike against it. It seems lately Intel has loosened its iron grip on Thunderbolt 3 (after all, it handed the standard over to USB IF) so now everything goes (we see empty M.2 to TB3 enclosures and chaining eGPU boxes both of which were forbidden by Intel prior) but the fact they didn't include the trademarked name makes me go hm. Finally, it could be a DP 1.4 MST hub but that is very rare (the first USB C to DP 1.4 MST I am aware of was announced at CES 2020 https://plugable.com/2020/01/07/plugables-new-docking-station-and-adatpers-at-ces-2020-raise-the-bar-for-connectivity-power-and-productivity/ https://plugable.com/2020/01/07/plugables-new-docking-statio... and didn't ship yet) and figuring out support will be _very_ interesting. All Intel 14nm laptop CPUs are stuck with DisplayPort 1.2 and then researching which laptops with Radeon / nVidia GPUs run their USB C through those GPUs to provide DP 1.4 will be fun. Let's put 4k @ 60 (and then 4k @ 30) into the bandwidth calculator: https://linustechtips.com/main/topic/729232-guide-to-display-cables-adapters-v2/?section=calc&H=3840&V=2160&F=60&calculations=show https://linustechtips.com/main/topic/729232-guide-to-display... you can see you need more than what DP 1.2 can provide so everything I said above applies. Oh and of course if it's for a Mac, in general, you could just use two USB C plugs, I suspect that's what the 4k @ 60 + 4k @ 30 is: one plug is used in DP alt mode, the other is used in MFDP mode.
- Terretta 7y ago
  It doesn’t support macs with a single port because it takes two ports, uses each one. That changes the bandwidth calculator math. This adapter was, I believe, also announced at CES 2020.
  - chx 7y ago

pzb 7y ago

You can do 3840x2160@60Hz (and 24bpp/8bpc) over USB Type-C on newer displays. DisplayPort Alt Mode over USB-C using DisplayPort 1.3/1.4 can support 4K + USB 3 Gen2 on one cable. https://www.amazon.com/UPTab-10Gbps-60hz-Power-Delivery/dp/B081QNHSJW https://www.amazon.com/UPTab-10Gbps-60hz-Power-Delivery/dp/B... is an example

lxgr 7y ago
Exactly. Apple also recently quietly updated their multiport adapter to do just that: https://support.apple.com/en-us/HT207806 https://support.apple.com/en-us/HT207806 Intel (GPU) Macs are notably not supported, unfortunately (due to supporting DisplayPort 1.2 only).

deleted 7y ago

[deleted]