USB 3.1 vs USB 3.2-Difference between USB 3.1 and USB 3.2

This page compares USB 3.1 vs USB 3.2 versions and mentions difference between USB 3.1 and USB 3.2.

The USB stands for Universal Serial Bus. USB supports peer to peer communication. In this type of interface, communication takes place between host and peripheral and not between two hosts (or peripherals). It mentions requirements for connection, communication and PS (power supply) between PCs and peripheral devices. There are various versions of USB which include v1.0, v2.0, V3.0, V3.1 and V3.2. Each of these versions support different data rates.

USB 3.1

• Speed: 5 Gbps (USB Gen1, Superspeed) , 10 Gbps (USB Gen2, Superspeed+)
• It is released in 2013
• USB 3.1 is backwards compatible with USB 2.0 and USB 3.0 but requires appropriate adapters.
• Power consumption: 5 A
• There are two versions i.e. USB 3.1 Gen1 and USB 3.1 Gen2.
• USB 3.1 Gen2 can transfer data at upto 10 Gbps over USB-type-A and USB-C connectors

USB 3.2

• Speed: 5 Gbps (Gen1), 10 Gbps (Gen2), 20 Gbps (Gen 2x2)
• It is released in 2017.
• USB 3.2 is backwards compatible with previous versions for working operation.
• Power output:
• There are different versions i.e. USB 3.2 Gen 1, USB 3.2 Gen 2 and USB 3.2 Gen 2x2.
• It is also known by SuperSpeed USB .
• 24 pin USB Type-C connector is used.

Tabular difference between USB 3.1 and USB 3.2

Following table summarizes difference between USB 3.1 and USB 3.2 versions.

Features USB 3.1 USB 3.2
Versions Gen 1, Gen 2 Gen 1x1, Gen 1x2, Gen 2x1, Gen2x2
Transfer rate 5Gbps, 10 Gbps 5Gbps, 10Gbps, 20Gbps
Power output 4.5W (Gen1), 100W (Gen2) Upto 100W
Cable length 1m (USB 3.1 Gen2), 5m (USB 3.1 Gen1). 20 Gbps transfer speed over 1 metre cables or
or 8 Gbps over 5 metre cables
Data signal encoding Gen1: data signaling over 1 lane using 8b/10b encoding, Gen2: over 1 lane using 128 b/132 b encoding. Gen1x1 : 5Gbps over 1 lane using 8b/10b encoding , Gen1x2 : 10Gbps over 2 lanes using 8b/10b encoding , Gen2x1 : 10Gbps over 1 lane using 128b/132b encoding, Gen2x2 : 20Gbps over 2 lanes using 128b/132b encoding.

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