Docks
Thunderbolt 4 vs USB-C: what your laptop will actually drive
The port shape tells you nothing. The controller behind it decides everything.
A USB-C port can be four different things wearing the same jacket: plain USB 3.2, USB4, Thunderbolt 3, or Thunderbolt 4. They all accept the same cable. They do not all drive the same screens.
The limits that matter
- Plain USB-C (10 Gbps) — one external display, usually 4K30 or 4K60 if DisplayPort alt mode is supported. Charging depends on the laptop.
- USB4 / Thunderbolt 3 — two 4K60 displays, 40 Gbps, up to 100 W in.
- Thunderbolt 4 — same 40 Gbps but guarantees two 4K60 or one 8K, and guarantees PCIe tunnelling.
That is why a dock can be "compatible" with your laptop and still refuse to light up the second monitor. The dock is fine; the port is not a Thunderbolt port.
How to find out what you have
On Windows, open the Thunderbolt Control Centre — if it is not installed, you probably do not have Thunderbolt. On macOS, Apple menu → About This Mac → System Report → Thunderbolt. On Linux, boltctl list.
If the laptop has an AMD Ryzen with USB4, you will see "USB4" rather than "Thunderbolt" — it behaves the same for displays.
Charging is the second trap
A dock that delivers 96 W will charge a 14-inch laptop at full speed and a 16-inch one slowly under load. Check the wattage your laptop expects, not the wattage on the dock's box.
Our Dock 14 pushes 96 W to the host and takes a 180 W supply, so the remainder runs the ports rather than the laptop.
The rule before you buy
Ask three questions: how many displays, at what resolution and refresh, and how many watts does the laptop want. If the answer to any of them is "I think so", email us the model instead of guessing. We would rather sell you a hub than a dock you cannot use.
Mentioned in this article
Dock 14 — Thunderbolt 4 dock, fourteen ports, one cable. $279.00.
