You’ll most often see USB4 appear on AMD laptops, and Thunderbolt on Intel laptops. USB4 is essentially a subset of Thunderbolt 4, mainly designed as an an I/O specification. Thunderbolt 4 allows for longer cables and more Thunderbolt ports on laptops, too. Thunderbolt 4 supports “wake on sleep” from an external keyboard or mouse, which allows you to tap your external keyboard or wiggle your mouse to wake up your PC, which is handy. For external storage, Thunderbolt 4 supports 32Gbps of data transfer-this really only matters for video, external GPU connections, or possibly games. Thunderbolt 4 doesn’t allow for any leeway-you’re getting a full-fledged 40Gbps connection (32Gbps PCIe + USB 3.2), no questions asked. Thunderbolt 3 is also the only specification (not Thunderbolt 4) that we’ve seen connecting to external GPUs, in case you’d like to try that approach. Thunderbolt 3 also supports a slower (16Gbps) PCIe connection for connecting to external storage.
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Most manufacturers go beyond this, however, and our recommended docks support the full specification (and two 4K displays) unless noted. “Up to” is the key phrase: Thunderbolt 3 is only required to support a 10Gbps connection, allowing for a single external 4K display (a 16Gbps PCIe connection, paired with USB 3.2). Think of Thunderbolt 4 as the more restrictive version of Thunderbolt 3, with little room for any gotchas.Įssentially, Thunderbolt 3 and Thunderbolt 4 allow up to 40Gbps maximum bandwidth, enough for two 4K/60 displays. The longer answer, which we’ll describe below, is that there are differences, and parsing the nuances can be confusing. The short answer: Not that much, and we consider Thunderbolt 3 docks and Thunderbolt 4 docks to be functionally equivalent for most users. Our next question describes the difference between Thunderbolt 3, 4, and USB4. Intel’s 12th-gen and 13th-gen Core chips offer the most consistent Thunderbolt experience, with 40Mbps Thunderbolt 4 speeds, including 32Gbps for data transfers to and from storage devices. Essentially, Intel’s 10th-gen and 11th-gen Core chips launched in the early days of Thunderbolt, and company representatives say that you can depend on them for 32Gbps of data, not a full 40 Gbps. In the real world, things are slightly more complicated. (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.
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. There are very rare exceptions: A new USB 3.2 Gen 2×2 spec can pair two 10Gbps channels together, creating an aggregate 20Gbps hub. Thunderbolt 4 differs very slightly in that it supports a theoretical maximum of 32Gbps for external storage devices, but you probably won’t notice the difference. Thunderbolt 3 and 4 ports, the most common standard, transfer data at up to 40Gbps. Most USB-C ports are built on the second-generation USB 3.1 data-transfer standard, which transfers data at 10Gbps. If the price is right, consider it.Īnker Apex 12-in-1 Thunderbolt 4 Dock review
Really, this is a perfectly useful Thunderbolt 4 docking station that challenges our top-ranked Thunderbolt docks. The dock is powered, with a 120W power supply. In total, the dock supports the two Thunderbolt 4 ports, two USB-A ports (10Gbps, 4.5W of power), another two USB-A ports (480Mbps, 4.5W), and a USB-C port (10Gbps, 20W) alongside gigabit ethernet, a UHS-II SD card reader, and a 3.5mm headphone jack.
The upstream Thunderbolt port can supply up to 90W of power to your laptop, while the downstream port can charge other devices at 15W.Īnker’s inclusion of two HDMI ports means you don’t need any adapters to connect displays, provided you own two with HDMI connections. The Apex Thunderbolt 4 Dock features one 40Gbps upstream TB4 port (that connects to the computer with the included Thunderbolt 4 cable) and one 40Gbps downstream TB4 port for other devices, such as a fast SSD storage drive.
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