What Is USB 3.0?

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What you need đồ sộ know about the standard's details, meaning, and connector types

Updated on December 15, 2022

USB 3.0 is a Universal Serial Bus (USB) standard, released in November 2008. Most new computers and devices being manufactured today tư vấn this standard, which is often referred đồ sộ as SuperSpeed USB.

Devices that adhere đồ sộ this USB standard can theoretically transmit data at a maximum rate of 5 Gbps (5,120 Mbps), but the specification considers 3,200 Mbps more reasonable in everyday use. This is in stark contrast đồ sộ previous USB standards lượt thích USB 2.0 that, at best, can transfer at 480 Mbps, or USB 1.1 that tops out at 12 Mbps.

Older USB devices, cables, and adapters might be physically compatible with USB 3.0 hardware, but if you need the fastest possible data transmission rate, all devices must tư vấn it.

USB 3.2 is an updated version of USB 3.1 (SuperSpeed+), though USB4 is the latest standard. USB 3.2 increases this theoretical maximum tốc độ đồ sộ đôi mươi Gbps (20,480 Mbps), while USB 3.1 comes in at a maximum tốc độ of 10 Gbps (10,240 Mbps).

USB 3.0, USB 3.1, and USB 3.2 are the "old" names for these standards. Their official names are USB 3.2 Gen 1, USB 3.2 Gen 2, and USB 3.2 Gen 2x2, respectively.

What is USB 3.0?

USB 3.0 Connectors

The male connector on a USB 3.0 cable or flash drive is called the plug. The female connector on the computer port, extension cable, or device is called the receptacle.

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USB 3.0 Cable (Type A đồ sộ Micro-B). Cable Matters

USB Type-A: These connectors, officially referred đồ sộ as USB 3.0 Standard-A, are the simple rectangular type of USB connectors, lượt thích the plug at the kết thúc of a flash drive. USB 3.0 Type-A plugs and receptacles are physically compatible with those from USB 2.0 and USB 1.1.
USB Type-B: These connectors, officially referred đồ sộ as USB 3.0 Standard-B and USB 3.0 Powered-B, are square with a large notch on top and are usually found on printers and other large devices. USB 3.0 Type-B plugs are not compatible with Type-B receptacles from older USB standards, but plugs from those older standards are compatible with USB 3.0 Type-B receptacles.
USB Micro-A: USB 3.0 Micro-A connectors are rectangular, "two-part" plugs and are found on many smartphones and similar portable devices. USB 3.0 Micro-A plugs are only compatible with USB 3.0 Micro-AB receptacles, but older USB 2.0 Micro-A plugs will work in USB 3.0 Micro-AB receptacles.
USB Micro-B: USB 3.0 Micro-B connectors look very similar đồ sộ their Micro-A counterparts and are found on similar devices. USB 3.0 Micro-B plugs are compatible with USB 3.0 Micro-B receptacles and USB 3.0 Micro-AB receptacles only. Older USB 2.0 Micro B plugs are also physically compatible with both USB 3.0 Micro-B and USB 3.0 Micro-AB receptacles.

The USB 2.0 specification includes USB Mini-A and USB Mini-B plugs, as well as USB Mini-B and USB Mini-AB receptacles, but USB 3.0 doesn't tư vấn these connectors. If you encounter these connectors, they must be USB 2.0 connectors.

Not sure if a device, cable, or port is USB 3.0? A good indication of compliance is when the plastic surrounding the plug or receptacle is the color xanh lơ. While it's not required, the USB 3.0 specification recommends the color xanh lơ đồ sộ distinguish cables from those designed for USB 2.0.

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You can view a USB physical compatibility chart for a one-page reference for what-fits-with-what.

Extra! A Few More Facts About USB 3.0

The first Microsoft operating system đồ sộ include built-in tư vấn for this USB standard was Windows 8. The Linux kernel has had supported since 2009, starting with version 2.6.31. See Does My Computer Support USB 3.0? if you're on a Mac.

Japanese computer peripheral company Buffalo Technology was the first đồ sộ ship USB 3.0 products đồ sộ consumers in 2009.

There isn't a maximum cable length defined by the USB 3.0 specification, but 10 feet is the upper limit usually implemented.

You can install USB 3.0 drivers in Windows if they've become corrupted and your devices are no longer working properly.

FAQ

What is a USB-C port?

USB-C ports are for USB-C connectors. They are small and thin and have an oval appearance. USB-C supports USB4, 3.2, and 3.1. It is also backward compatible with USB 3.0 and USB 2.0.
How bởi I clean a USB port?

If you see something stuck inside the USB port, shut down your computer and gently remove the obstruction with a thin plastic or wooden tool lượt thích a toothpick. You can also use canned air đồ sộ clean out a USB port. Just be careful not đồ sộ shove the obstruction further in.
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