Thunderbolt 4: Speed and Power
Thunderbolt 4 (2020) runs at 40 Gbps over USB-C, supports up to 100W (PD3.0), and requires the host to supply 15W+.
Open the interactive Standards & Sizes tool →Key facts
| Max speed | 40 Gbps |
|---|---|
| Max power | Up to 100W (PD3.0) |
| Connector | USB-C (24 pin) |
| Year | 2020 |
| Host minimum | 15W+ supply required |
Frequently asked questions
How fast is Thunderbolt 4?
Thunderbolt 4 runs at 40 Gbps and supports 4K dual or 8K single displays plus PCIe.
Is Thunderbolt 4 the same as USB4?
Thunderbolt 4 makes USB4's optional features mandatory and requires Intel certification, so it is a stricter superset.
Related pages
Thunderbolt 4 Spec is part of Standards & Sizes on GOAT Lab — a free reference you can use without signing up, and it works offline. Open the tool above for any custom value.
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