You can plug a Thunderbolt dock into a non-Thunderbolt, generic USB-C port. But it will be limited by the available bandwidth that the port provides, so it’s somewhat deceptive in that regard.Ī Thunderbolt 3 “compatible” dock is not a true Thunderbolt dock, but a USB-C hub. Most USB-C ports are built on the second-generation USB 3.1 data-transfer standard, which transfers data at 10Gbps.

Most Thunderbolt 3 ports, the most common standard, transfer data at up to 40Gbps. Thunderbolt 4 differs slightly in that it supports a theoretical maximum of 32Gbps where data transfers are concerned, specifically for external storage devices. There are somewhat rare exceptions: A new USB 3.2 Gen 2×2 spec can pair two 10Gbps channels together, creating an aggregate 20Gbps hub. And while the vast majority of Thunderbolt 3-equipped laptops are designed with four PCIe lanes for a total of 40Gbps, some laptops only ship with two PCIe lanes for a total of 20Gbps. What’s the difference between Thunderbolt 3, Thunderbolt 4, and USB4? (A Dell support page, for example, details its four-lane and two-lane laptops.) Essentially, a 20Gbps connection should be enough for a single 4K monitor running at 60Hz, with a bit of extra bandwidth for other data transfers among connected peripherals.

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