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Tests show Thunderbolt ports on M1 Macs don't fully support USB 3.1 Gen 2 speeds: Digital Photography Review
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Amazon.com: OWC 14-Port Thunderbolt Dock with Cable, Certified for Windows PC and Mac, 85W Charging Power, Connect Two 4K displays or one 5K Display, Dual Thunderbolt Ports, Thunderbolt Cable Included (0.7 M) :
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YIWENTEC USB-C 8K KVM Switch DP 1.4 2xUSB-C PC to One DisplayPort Monitors 8K@60Hz 4K@144Hz 3X USB2.0 Sharing Mouse Keyboard Printer 2in 4out Converter Compatible with Thunderbolt 3/4 - Newegg.com
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Chuwi CoreBox Pro: Ice Lake mini-PC with a Thunderbolt 3 port launched for US$439 - NotebookCheck.net News
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Plugable Thunderbolt 3 Dock, Enables Extra Displays, Wired Network, Audio, and More USB Ports, Compatible with Thunderbolt 3 Macs and PCs (4K DisplayPort or HDMI Display, No Host Charging)
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OWC 14-Port Thunderbolt 3 Dock with Cable, Compatible with Windows PC and Mac, Space Gray - Newegg.com
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