USB-C is a connector. The same connector — the same physical piece of plastic and metal you plug into your laptop, your phone, your tablet, and your monitor — can support a 480 Mbps data link, a 5 Gbps data link, a 10 Gbps data link, a 20 Gbps data link, a 40 Gbps data link, or no data link at all. The same connector can support 7.5W of charging, 60W of charging, 100W of charging, or 240W of charging. The same connector can carry a DisplayPort signal, an HDMI signal, a Thunderbolt signal, or none of those.
Which capabilities a particular USB-C cable actually supports depends on what is inside the cable’s plastic jacket — what gauge of conductor, how many of the available pins are wired up, what e-marker chip is in the connector. The connector itself does not announce any of this. The result is a uniquely confusing consumer category in which a cable that visually looks identical to another cable might do an entirely different set of things.
We tested 12 USB-C cables across multiple price tiers — from the cables that ship with current consumer electronics through high-end Thunderbolt 4 cables — for both charging at high wattage and data transfer at high speeds. The findings, summarized below, are not new to anyone who has been buying cables professionally. They will be useful to most consumers.
The general rule
Look at the explicit ratings, not the brand or the price. Cables that are rated to do high-wattage charging will say so on the cable, the package, or the listing — usually as “100W PD” or “240W PD” or “EPR” (for the higher-wattage extended power range). Cables that are rated to do high-speed data transfer will say so as “USB4,” “Thunderbolt 4,” or “10 Gbps” / “20 Gbps.”
Cables that do not have these explicit ratings are not rated for those use cases, and the absence of the rating is informative. A cable that can do 100W charging or 10 Gbps data transfer would, in most cases, be marketed as such, because there is a marketing premium for those specifications. A cable that does not advertise them is usually a cable that cannot do them.
What the cheapest cables actually do
Most of the cables that ship in the box with phones, smaller chargers, accessories, and budget electronics are USB 2.0 cables — meaning they support 480 Mbps data transfer (effectively useless for anything except basic file transfer) and a charging current that depends on the gauge of the conductor. The good news is that for charging a phone at 20W or 30W and for transferring small amounts of data, this is fine. The bad news is that for any modern laptop’s full charging speed, or for transferring large media files between devices, these cables are inadequate.
Substituting these for a higher-rated cable does not improve their capabilities; the cable’s electronics are what they are. Replacement is the only path.
What we tested
We tested two each of: bundled-with-phone cables, generic Amazon cables in the $5-$10 range, branded cables in the $15-$25 range from established makers (Anker, Belkin, UGREEN), and high-end cables in the $30+ range marketed as USB4 or Thunderbolt 4. Each cable was tested for charging delivery to a 16-inch MacBook Pro at full charge speed (140W), data transfer with a high-speed external SSD, and DisplayPort tunneling to an external display.
Results in summary: the bundled and generic cheap cables generally delivered usable charging at low wattages and unusable data speeds. The branded mid-range cables generally delivered what their explicit ratings claimed; cables rated for 100W PD did 100W PD reliably, cables rated for 10 Gbps did 10 Gbps reliably, cables rated for nothing in particular did mostly nothing in particular. The high-end USB4 and Thunderbolt 4 cables delivered the full advertised data speeds and DisplayPort tunneling reliably.
The handful of cables that were marketed at one specification but did not deliver it were all in the lowest price tier, and were all sold by sellers whose packaging did not explicitly include the certification logo for the standard they implied.
What to actually buy
For most users, three cables cover the realistic needs: one short cable (0.5 to 1 meter) for travel charging, rated for at least 60W; one longer cable (2 meters) for desk charging, rated for at least 100W; one cable explicitly rated for high-speed data and DisplayPort tunneling, if you connect external displays or transfer large files over USB-C.
Anker, UGREEN, Belkin, and Apple all sell competent cables in these specifications. The Apple cables are typically the most expensive and the best-built; the others are usually within 10 to 20 percent of Apple’s quality at substantially lower prices. The differences between major brands at the same explicit specification are not large; the difference between a properly specified cable and an unspecified one is large.
What to avoid
Cables sold without explicit ratings, by sellers whose packaging makes vague performance claims rather than specific certifications. Cables marketed primarily by aesthetic (“braided premium cable!”) rather than by capability. Cables in the lowest price tier from sellers whose other products are similarly poorly specified.
Beyond that, we would suggest skepticism toward branded “tier” naming. “Premium,” “Pro,” “Plus,” “Ultra,” and similar brand markers do not have agreed-on technical meanings in the cable category and are usually closer to marketing than to engineering. The actual rating — the wattage, the data speed, the certification logo — is the thing to look for.
The longer view
The USB Implementers Forum, which manages the USB standards, has been gradually pushing for clearer marketing labels — formal logos that announce specific capabilities, mandatory packaging standards. These efforts have made progress over the last several years, and the situation is meaningfully better than it was in 2020. A consumer who shops carefully today can buy cables that do what they say they do.
A consumer who shops carelessly will continue to find that the connector that fits everything and the cable that does everything are not the same thing.