A higher watt rating does not automatically make a USB-C cable faster for files or suitable for a monitor. Start with your task, then compare power, data and video for the exact model and length.
What differs between a 240W charging cable and a 100W Thunderbolt cable?
This manufacturer-specification comparison was checked on 19 October 2026. It uses exact options from the US and Korean stores, not a price ranking or hands-on test. Other lengths, generations and regional options need their own specifications.
| Check | Apple 240W USB-C Charge Cable | Apple Thunderbolt 4 Pro |
|---|---|---|
| Store and option | US · MYQT3AM/A · 2m | Korea · MW5H3FE/A · 3m |
| Charging | Up to 240W | Up to 100W |
| Data | USB 2 | USB 3: up to 10Gbps Thunderbolt 3/4 and USB 4: up to 40Gbps |
| Video | Not stated on this product page | DisplayPort HBR3 |
| What this shows | High charging power does not mean fast data | The data-rate limit depends on the supported protocol |
The 240W figure is the cable's power specification, not power that every connected device will receive. Likewise, 40Gbps is not a promised copy speed for a USB 3 SSD. Charging and transfers also depend on the devices, their ports, the charger and the connection mode.
Apply the comparison to a 10Gbps SSD connection
Suppose the goal is a USB 10Gbps connection supported by both computer and SSD. The 240W charge cable above is specified for USB 2, so it does not meet that goal. The Thunderbolt 4 Pro cable lists USB 3 support up to 10Gbps, meeting that specification check; it still does not guarantee files will copy at 10Gbps.
The missing requirement is the stated data mode, not more watts. This does not mean you must buy the Thunderbolt model shown. Keep an existing cable if it already meets the requirements of your task.
Set a pass condition for your task
| Task | What must be supported |
|---|---|
| Charging only | Check the device and charger's charging method and required power against the cable. For a multiport charger, also check power per port with the intended devices connected. |
| External SSD files | The SSD, chosen computer port, cable and any hub must support the target data mode. A watt rating alone cannot establish this. |
| USB-C monitor | Check video support on the exact computer port, monitor input and cable. A candidate whose video support remains unverified is not an established choice for this task. |
Read certification markings alongside the specifications
USB-IF's USB-C-to-USB-C certification requirements use 60W or 240W power markings. Data-rate markings are also required except for USB 2 cables. A power mark alone is not evidence of video or fast-data capability. USB-IF
- Choose the required length and record the exact cable model and option.
- Copy power, data mode and video support from the manufacturer. Leave missing fields unresolved.
- Compare them with the specific ports you will use. A cable cannot add a capability those devices lack.
- Check your existing cable first; buy only after identifying a requirement it cannot meet.
After choosing the cable
- Compare the port, cable and hub when an external SSD remains slow
- Read a multiport charger's power-sharing table
Manufacturer and standards sources
- Apple 240W USB-C Charge Cable — MYQT3AM/A
- Apple Thunderbolt 4 Pro — MW5H3FE/A
- USB-IF: Cables and Connectors
Specifications checked: 19 October 2026. This is a document comparison, not a measurement of charging, transfer speed or durability. Prices and availability were not evaluated.