![]() This is only a connector type, not a USB standard. USB Type C (USB-C) deserves its own mention here. Shoppers will have to look for the Superspeed trident logo with a small 10. Furthermore, devices and cables supporting the newer Gen 2 standard are less common. This more powerful data and power transfer comes at a cost: cable length is more limited in Gen 2. Usb 3.1 gen2 type a actual speed full#Only the USB Type C (USB-C) connector can handle the full power and bandwidth of Gen 2. This standard preserves the 5 Gbit/s transfer rate of USB 3.1 Gen 1 and also allows for a higher maximum speed of 10 Gbit/s (1.25 gigabytes per second). This standard was launched far more recently in July 2013. Those connectors are not capable of supporting the full power of the USB 3.1 Gen 2 spec. There’s the bulky Type B (aka “printer”) connector, as well as the slim Micro-B connector seen above. ![]() Unlike Gen 2, Gen 1 also includes more than one connector type. This is all supported over the USB 3.1 Gen 1 connector which looks like a USB 2.0 A connector that’s blue on the inside. USB 3.1 Gen 1 supports speeds up to 5 Gbit/s or 625 megabytes per second (MB/s) and power up to 900 mA at 5V. The standard did introduce some changes, like the USB Type C (USB-C) connector seen on new MacBook Pros.ĭespite the new name, data and power transfer capabilities stayed the same as specified in USB 3.0. So those cables and devices now, through the power of renaming the standard, support USB 3.1 Gen 1. In fact, with the release of USB 3.1 Gen 1, all existing USB 3.0 connectors were renamed to USB 3.1 Gen 1. Here’s where much of the nomenclature confusion starts. Apple devices actually charge at 2.1 Amps, more than four times the USB 2.0 specification. Yet, most modern devices only draw as much power as they need and can easily support higher-level current. However, they are technically outside the USB spec and risk blowing up a device if the circuitry isn’t expecting higher current levels. ![]() ![]() Some USB chargers can provide higher power levels, charging devices faster. While we’re discussing specs, we should mention that power specifications have never been hard limits they’re more like speed limit signs, showing the maximum safe power level. USB 3.0 allowed for dramatically higher power levels and faster data transfer, boosting them to 900 mA at 5V and 5 gigabits per second (Gbit/s), respectively. USB 2.0 also limited power to 500 mA at 5V. It upgraded USB 2.0, which was released in 2000 and allowed for only relatively slow transfer speeds of 480 Mbit/s. Released ten years ago in 2008, USB 3.0 was the third major revision to the USB standard. What’s the difference between USB 3.1 Gen 1 and Gen 2, and why is Gen 2 better than Gen 1? Goodbye USB 3.0 The USB standard these days is a little hard to understand, and computer manufacturers aren’t helping clear up the confusion. ![]()
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