The problem is that USB C dongles have so much variety that it’s hard to tell which ones work and which ones don’t.
USB-C ports in non-Thunderbolt mode have 2 channels + USB 2.0 as far as I know. You can use both channels for data or video. So the dock often uses one channel for data and one channel for video. However, with a single video channel, the dock can transmit a maximum of 4K30Hz. No USB-C docking (not using Thunderbolt) with USB 3.0 and 4K60Hz ports
If you want 4K60Hz, you need to use a dedicated dongle (i.e. one USB-C to one Displayport, with optional USB 2.0 ports), or Thunderbolt 3.
Thunderbolt docks are in a class of their own. You can easily power multiple 4K60Hz displays via Thunderbolt, so you still have room for Ethernet, audio, and a USB 3.0 port. The disadvantage of these lightning piers is that they are expensive: their prices around 300 euros are common. Manufacturers generally lie and mislead everything together and thus it is very difficult to tell which docks are real lightning pans. The dock I use myself is from Elgato: https://www.elgato.com/en/dock/thunderbolt-3
And it can charge everything via a single cord, including the 85W with the included charger (so you can leave your laptop charger in your bag)
I have a 4K display in the DisplayPort connection, and another 4K display via a Thunderbolt 3 <> HDMI 2.0 dongle in the Thunderbolt port. Note that the thunderbolt 2 dock has 3 ports, but one of them is used as an input, so you can only use 1 as an output.
[Reactie gewijzigd door Gamebuster op 9 augustus 2021 12:13]
Then there’s a final class of USB-powered docks without Thunderbolt, and still supporting multiple 4K60Hz displays. These docks are often cheaper and seem to work well on Windows, but not macOS without drivers. These are called Displaylink sinks, which use video over data. With video compression, the video signal is converted to data, pumped through USB, and converted back to video in the dock. This works well, of course, with the caveat that it requires all kinds of programs to run in the background and may be accompanied by visual glitches, stress, lag, and/or higher CPU usage. Good for your desktop computer, but far from ideal. The last time I tried this on my macbook the software wasn’t working properly, I couldn’t use the dpi scale (unprepared resolution only) and it was loading more CPU than I thought was acceptable.
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