Woot! has (NEW) Apple Thunderbolt 4 (USB‑C) Pro Cable (1m) on salef or $37.
Amazon Prime members get free shipping on Woot!, otherwise shipping is $6.00.
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- Featuring a black braided design that coils without tangling, this 1-meter cable supports Thunderbolt 3, Thunderbolt 4, and USB 4 data transfer up to 40Gb/s, USB 3 data transfer up to 10Gb/s, DisplayPort video output (HBR3), and charging up to 100W.
- Use this cable to connect a Mac with Thunderbolt 3 or 4 (USB-C) ports to Thunderbolt (USB-C) and USB displays and devices such as Studio Display, Pro Display XDR, docks, and hard drives. You can also use this cable to connect iPhone 15 Pro to Mac.
- Compatible with Studio Display, Pro Display, iPad and Mac
- Braided design that coils without tangling
https://electronics.woot.com/offe...=w_gw_dd_2
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USB-C is just a connector. USB specification "USB 3.2" supports up to 20Gbps on a USB-C connector. USB specification "USB4" supports up to 80Gbps symmetric and 120Gbps asymmetric because Thunderbolt 4 is really just USB4, but with requirements for supporting features that are optional in the USB4 specification.
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In terms of the amount of wires populated in a cable, there are only two types: what the USB-C specification calls "USB 2.0" and "Full-Featured". The "USB 2.0" type has Vbus, Ground, CC, and D+/D-. These are what you might think of as a charging cable since they carry power and everything needed for USB Power Delivery communication (as well as up to 480Mbps of USB data transfer). The "Full-Featured" type has everything previously mentioned and in addition includes 4 sets of signaling wires that are required for USB 5Gbps and higher, as well as Alternate modes such as DisplayPort and Thunderbolt 3.
USB-C introduced the concept of an emarker. This is a simple IC that just contains information about the cable and can respond to USB Power Delivery requests for that information. The only USB-C cables that are not required to have an emarker are 60W-rated "USB 2.0" cables.
There is the concept of Active and Passive cables. A Passive cables does not incorporate any electronics to condition the data path signals. Active cables are USB Full-Featured Type-C Cables that incorporate repeaters in the data path of those previously mentioned 4 sets of signaling wires. Active cables are required when the length of the cable is so long that the signal gets distorted beyond specification limits by the time it reaches the other side. The longest Passive USB-IF or Thunderbolt certified cables (tested to meet all specification-required signal integrity criteria) are currently 1.5m long.
Thunderbolt 3 was the first Thunderbolt specification to use the USB-C connector. It was deployed as an Alternate mode so that the 4 sets of signaling wires could carry Thunderbolt 3 signals directly. Next, the Thunderbolt 3 specification was donated to the USB-IF to develop USB4. Now, Thunderbolt 4 and Thunderbolt 5 are simply USB4 - their physical layer is specified in USB specifications. Thunderbolt is now more like a software stack with minimum hardware requirements than its own protocol.
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All that said, we can say a few things:
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