Thunderbolt 4 40Gbps Active Cable 6.6 ft - 100W Charging

In this review of the Cable Matters Active Thunderbolt 4 cable, the bottom line is simple: this is a long, certified Thunderbolt 4 cable built for users who need full 40Gbps throughput, high-resolution video, and up to 100W charging from a single connection. It is aimed at professionals, content creators, and anyone with extended desk setups who want the flexibility to drive an 8K display or two 4K monitors while powering a laptop. The cable's certification and length make it stand out for extended setups where passive cables fall short.

Key Features

• 40Gbps data transfer: Certified Thunderbolt 4 bandwidth lets you move large files quickly and supports demanding peripherals like eGPUs and high-speed storage.
• 100W Power Delivery: Power Delivery 3.0 up to 100W charges laptops and devices while also carrying video and data, reducing cable clutter.
• 8K or dual 4K video: The cable provides enough bandwidth to drive one 8K display or two 4K displays at high refresh rates for content creation and multi-monitor workflows.
• Thunderbolt 4 and USB4 compatibility: Works with both Thunderbolt 4 and USB4 hosts and devices, making it broadly useful across modern laptops and docks.
• Backward compatibility: Supports Thunderbolt 3 and USB-C devices so older hardware remains usable while upgrading to current standards.
• Extended certified length: At 6.6 ft this is one of the longest active Thunderbolt 4 cables certified for full performance, ideal for flexible workspace layouts.

Who It's For

The cable is best for professionals and creators who need a single cable solution for high-speed storage, video and power-photographers, video editors, and users with Thunderbolt docks or eGPUs will get the most value. It is also well suited to users with larger desks or multi-display setups who need a certified active cable to maintain full 40Gbps performance at a longer length.

Shoppers who primarily need short, inexpensive charging cables or who never use high-resolution external displays may prefer a simpler USB-C cable. Those relying on older, fault-prone hardware should consider their existing ports and warranties, since a certified Thunderbolt 4 cable only solves connectivity when both ends and the hosts support the standard.

Pros & Cons

Pros

• Certified Thunderbolt 4 performance with full 40Gbps bandwidth for high-speed peripherals and storage.
• Supports Power Delivery up to 100W so a single cable can handle charging, video and data.
• Long 6.6 ft active design retains full performance for flexible desk layouts and multi-monitor setups.
• Works with USB4 and is backward compatible with Thunderbolt 3 and USB-C devices for broad compatibility.

Cons

• Some users report mixed long-term reliability, so durability may vary between units.
• Active certified cables are more expensive than short passive USB-C cables, which may be overkill for basic charging.

Specifications

Our Verdict

The Cable Matters Active Thunderbolt 4 cable is a practical choice for users who need certified 40Gbps bandwidth, 100W charging and the flexibility of a longer active cable. It offers good value for professionals and creators who depend on high-resolution displays and fast external storage, though buyers should be aware that a few users report inconsistent long-term durability.

Frequently Asked Questions

Will this cable charge my laptop?
Yes. It supports Power Delivery 3.0 up to 100W so it can charge compatible laptops while carrying data and video.

Can it drive two 4K monitors?
Yes. The cable has the bandwidth to support dual 4K displays or a single 8K display when connected to compatible hardware.

Is it compatible with Thunderbolt 3 devices?
Yes. It is backward compatible with Thunderbolt 3 and USB-C devices, though performance depends on the connected host and device capabilities.