Ken Shirriff did a pretty great teardown on his blog, here: Teardown and e.At 320 mA, it will charge from any high power USB source with the cable in the 4-in-1 Travel Kit. #1580: iPhone 13 and iPhone 13 Pro, Apple Watch Series 7, redesigned iPad mini, and upgraded iPad, plus iOS 15, iPadOS 15, watchOS 8, and tvOS 15A2A If I am understanding but have the converted that one puts at the front, you have hacked the cable on a power supply There is circuitry in the cable head end itself. However, what I want to know is how to tell the wattage of my old macbook charger as it doesn't seem to be written anywhere on it. I've read that using a lower wattage charger can harm your computer in the long term and considering the amount of money I payed for my macbook, I'd rather pay the 75 not doing so is going to harm it.As I wrote in “ Explaining Thunderbolt 3, USB-C, and Everything In Between” (3 November 2016), USB-C is a hardware standard that allows peripheral controllers — a collection of firmware and chips and connectors — to pass various kinds of interface data. #1576: Work with image text using TextSniper and Photos Search, upgrade your home Wi-Fi, comparing MagSafe battery packsHow Some Thunderbolt 3 Cables Underperform with USB-only DrivesYou already know that the USB-C connection standard is difficult to sort out. #1577: iPhone 12/12 Pro repair program, fix corrupted Chrome extensions, iCloud Mail custom domains, Chipolo AirTag alternative, 10-digit dialing changes I’d like to break that down into a form that’s easier to understand if you’re not a peripheral communications standards geek.You can purchase four kinds of cables that have USB-C connectors on both ends: They provided an intricate and technical explanation, which I confirmed through testing. The Thunderbolt 3-equipped MacBook Pro and iMac models have a different, more capable controller.Now there’s a new issue layered on top of that: AppleInsider uncovered a problem with certain kinds of cables designed for Thunderbolt 3 connections. The MacBook supports USB and DisplayPort natively the newer Macs carry Thunderbolt 3, which the MacBook can’t handle. In the Apple world, look at the 12-inch MacBook, introduced in 2015, and both the 2016 and later MacBook Pro models and 2017 iMacs.I recommending avoiding low-wattage cables that only support USB 2.0 — they’re just about useless. The data rate is secondary. Apple uses a USB-C power cable for all its laptops to connect to the AC adapter. These cables can vary from low wattage (typically up to 15 watts) to high wattage (as much as 100 watts), but carry data only at up to 480 Mbps.
Know What Wattage Computer Charger To Get For My Plus IOS 15At up to about 6.6 feet (2 m), passive cables support just 20 Gbps.Thunderbolt 3 active cables. These cables can carry the maximum 40 Gbps data rate between Thunderbolt 3 devices only at 18 inches (0.5 m) or less. USB 3.1 Gen 2 (SuperSpeed+), which is 10 Gbps, is built into all Thunderbolt 3 Macs.Thunderbolt 3 passive cables. It’s found on the MacBook. Despite the version number bump, USB 3.1 Gen 1 is the same as the original USB 3.0, 5 Gbps SuperSpeed standard, but with a USB-C plug instead of the familiar USB-A flat plug (with a blue separator inside) or the weirdly shaped 3.0 Micro B common on portable drives. With an SSD, the difference would be even more striking.Thunderbolt 3 passive cables are far cheaper than the active ones. That’s toward the upper range of what you would expect from that drive. With a passive Thunderbolt cable, USB 3.1 Gen 1 passes data as you’d expect.I tested this with a G-Technology 1 TB USB-C (USB 3.1-only) hard disk drive, and was able to confirm AppleInsider’s results: about 35 megabytes per second (280 Mbps) of throughput with the active cable, and 130 megabytes per second (1 Gbps) of throughput with the passive one. You have a hard drive with a USB-C port that supports only USB 3.1.You’re using a Thunderbolt 3 cable to connect that drive to a Thunderbolt 3-capable computer.The Thunderbolt 3 cable is active, rather than passive.Instead of carrying up to 5 Gbps of USB 3.1 Gen 1 data, these active Thunderbolt cables throttle down to USB 2.0 speeds, offering about one-tenth as much throughput. You need this kind of cable for high-throughput Thunderbolt 3 peripherals, like SSD RAIDs used for video and animation.The trouble that AppleInsider discovered arises only in a particular set of circumstances: Some of these cables can also carry the maximum 100 watts of power allowed in the standard. When sorting through a collection of Thunderbolt 3 cables you didn’t purchase, there’s nothing that will help you distinguish between active and passive cables, so I recommend labeling any cables you buy as soon as you receive them.This is a very informative article. That’s a subtle indication for what could be up to a tenfold difference in throughput.When purchasing a Thunderbolt 3 cable, if you’re sure you want a passive one, it may not be labeled as such, but it will almost certainly be cheaper than an active cable of the same length, and, if longer than 1.5 feet (0.5 meters), labeled 20 Gbps. USB 3.1-only cables should be labeled with SS or SS+ on each end Thunderbolt 3 cables have a lightning bolt with an arrow at its tapered end. In my experience, such drives ship with a USB 3.1-only cable! And USB 3.1 drives with USB-C connectors aren’t that common because there’s little advantage to using USB-C on both ends: a USB-3.0/3.1 Gen 1 cable with a USB-C jack on one end and an old style USB-A jack or newer Micro B on the other provides the same 5 Gbps maximum throughput.However, I hope AppleInsider’s discovery (and my confirmation) will help explain mysterious performance problems you may have experienced with certain devices and cables. USB 3.1-only cables cost about half as much as passive Thunderbolt 3 cables.It seems unlikely that you would intentionally buy an expensive active Thunderbolt 3 cable to use with a USB 3.1-only drive. That means that you are relegated to USB peripherals and you will need adapters or docks for most of them. Only one connector and it is only USB C. The Macbook is a totally impractical product. This alleviates some of the confusion. I like the fact the the iMac has both Thunderbolt 3 and USB 3 connectors, and the Mac Mini has both Thunderbolt 2, and USB 3 connectors, and the Macbook Air also has Thunderbolt 2, and USB 3 connectors. Microsoft office 2016 for mac wanting to activate as office 365I can’t speak for everyone, but I find this annoying. This having to be concerned about which cable to buy since there are (from what I can see) 3 different cables using the same (USB C) connector, all with different capabilities. Granted you may still have to buy some adapters for older peripherals but you still have a more versatile connector.In addition, as someone else mentioned there is no way to use FW 800 or 400 peripherals with the Macbook.
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