Here’s Why Cables For Thunderbolt 4 And 5 Ports Cost So Much

Thunderbolt cables are fast and versatile, but they also come at a premium. The latest standard, Thunderbolt 5, can cost several times more than a basic USB-C cable. Given that they share the same port, you may be confused as to why there is such a huge discrepancy in price. Here’s a quick breakdown.

There is a lot of advanced technology inside each cable. For example, Thunderbolt 5 supports bidirectional data transfers up to 80 Gbps – and can transmit up to 120 Gbps (while receiving at 40 Gbps) in boost mode. It’s fast enough to transfer 1TB of data in just a few minutes. (With USB 2.0, the same process can take several hours.) Meanwhile, the older Thunderbolt 4 standard supports a (still zippy) 40 Gbps in either direction.

Certified Thunderbolt 5 cables can support 140W charging, with some cables supporting up to 240W via USB Power Delivery. And Thunderbolt 4 cables typically support up to 100W charging.

If you need one cable to handle all your data and power needs, Thunderbolt is the way to go. But at that speed, even minor interference can mess with the signal. Therefore, longer cables are often “active”. (This means they have IC chips to maintain signal integrity over distances.) These include retimer chips that clean and refresh the signal during travel, so it reaches the other end clearly.

The cable itself is not doing all this. (Thunderbolt controllers in connected computers and peripherals handle the heavy lifting.) But cables must be engineered to carry those signals without errors.

By comparison, those USB-C cables you have lying around your house are dinosaurs. Many of them only support USB 2.0 speeds. Even USB 3.2 Gen 2 tops out at 10Gbps. That’s enough for, say, transferring a few documents, music files or photos, or running a low-resolution display. But Thunderbolt is data transfer (and overall connectivity) on steroids.

Thunderbolt 5 can output to multiple 8K displays or extremely high-refresh gaming monitors (up to 540Hz). It supports DisplayPort 2.1 and PCI Express Gen4 – ideal for external GPUs (eGPUs). They are also great for high-speed SSDs. And unlike basic cables, you can connect multiple Thunderbolt devices in a daisy chain. Part of what you’re paying for is the advanced technology that enables all this.

Making matters a little confusing is USB4, which is partially based on Thunderbolt 3 technology. USB4 can reach 40 Gbps, similar to Thunderbolt 4. And USB4 V2 can reach 80 Gbps, matching Thunderbolt 5. The main difference? Well, this brings us to the next point.

Thunderbolt is powered and controlled by Intel. The company developed the standard with Apple, with the first consumer cable arriving in 2011. Under Intel’s rules, a cable can’t carry the Thunderbolt name or logo (yes, that’s a lightning bolt) unless it goes through a rigorous certification process. Those costs are included in the retail prices.

Certification is essentially Intel verifying that the cables will meet their advertised speeds, charge safely at the appropriate wattage and work reliably with backward compatibility.

On that note, you can purchase unofficial Thunderbolt-adjacent cables It is possible Perform just as well as certified people. But without Intel’s testing, the unofficial ones aren’t guaranteed to live up to their billing. If you don’t need the full Thunderbolt feature set and want to save some money, a USB4 cable from a reputable brand will likely offer the fast charging and high-speed data transfer you’re looking for.

Most people only need a simple USB-C cable. Despite what strange corners of the Internet may suggest, your average person doesn’t need to run multiple high-resolution displays or connect an eGPU to improve their gaming laptop. So, naturally, the market is filled with slower, simpler types designed for charging and basic data transfers. Large market and manufacturing scale together reduce costs.

When you add that Economics 101 lesson to Thunderbolt’s more advanced technology and certification costs, things become a little clearer. Now, at least you know what you’re getting into if you decide to pay several times more for a fast and versatile cable bearing the Lightning logo.