NAMCIM Thunderbolt 4 Cable, Thunderbolt Certified, 1.0 Meter (3.28 ft.), 40 Gb/s Data Transfer, 120W Power Charging, Compatible with Thunderbolt 4, Thunderbolt 3, USB-C, and USB4 Devices, Black

Until recently the longest Thunderbolt cable I could find at a reasonable price was 3-feet long. This one is significantly longer and doesn’t seem to have any significant lag in data transfer speeds.

I tried this with an iPad Pro M1 and my LG Ultrafine 5K which uses a thunderbolt connection and it worked well. There was no discernible difference vs the thunderbolt cable that LG provided with the monitor. I also connected to my M1 Mac Mini and under the system details it reported up to 40Gbps which is the theoretical throughput for Thunderbolt 4. So overall, it does what it is supposed to do. But to be clear, I dont have more precise measuring tools to do a super detailed analysis. But I have not encountered any problems.

I tested this cable with a Caldigit Thunderbolt Station 3 Plus dock. It connected a new Framework laptop (12gen intel i5 model) running Ubuntu 22.04, as well as a 15.4 Macbook Pro (2019) running Monterey. I did not test for data transfer speeds, but video, USB, sound, charging and network connectivity all functioned through the cable. Both computers went into an IOGear 4Port KVM switch out to an LG 32 monitor running at 3840x2160. It is a more complicated setup than most, but the cable did not have any issues.

Does not achive claimed transfer speeds.

This cable is braided with nylon. The charging speed is fast and data throughput is fast - I get about 600MBps write and about 800MBps read . I was able to transfer 10GB from my external NvME drive to the internal SSD under 15 seconds. Using it for USB C monitor connection is great, no video display issue. I was able to test resolution from 1080p to 4K, due to my monitor capability and the system picks up immediately. The charging speed was goo and I was consistently charging at about 2.6A-2.8A.

The NAMCIM Thunderbolt 4 Cable is a quality cable with excellent quality. The cable meets or exceeds all the specifications listed and has a quality braided design. The cable is a 1M cable and does work as a Thunderbolt 4 cable and can deliver loads of power for charging purposes. Quality cable at a reasonable price, highly recommended.

This cable is a perfect replacement for my old thunderbolt cable. I had no issues with the cable and connectivity was perfect.

Im not sure that this is actually thunderbolt as I wasnt able to find it on the list of thunderbolt approved devices, but it does still hit the advertised 40Gbps data transfer speeds when using a usb4 nvme enclosure, so it is at least usb4. I was able to charge at 100w, but I would expect a cable at this price point to be able to do 240w (regardless of if theres any devices that can take advantage of it yet). For current device limitations, this cable is fine, but as 240w usb-c devices start to come out, this cable wont be able to do the full 240w, while others in this price point (supposedly) will.

If youre in the market for a USB C to USBC cable, you are likely to be aware of the standards mess that allows cable manufacturers to sell some cables for charging only and others for data and others for both, but at all manner of charging rates. This is all thanks to the USB Implementers Forum for a botched implementation.

This is a good Thunderbolt cable that works as intended. I was able to connect my monitor (via monitor KVM switch) to my laptop and all the things attached to the KVM worked. I was able to get the full monitor resolution at its top-rated refresh rate.