Article 90 - USB Speed Differences

As of this article, there are three classes of the USB specification: USB 1, 2, and 3. Within these clases, various speed configurations are available. This article compares the potential speed of each type.

USB 1

The USB 1 specification specifies that two modes of configuration is available: low speed and full speed.

Low speed allows for up to 1.5Mbit/s. This is about 187.5KB/s. A 1 gigabyte file would take over 5300 seconds or almost 1.5 hours to transfer.
Full speed allows for up to 12Mbit/s. This is about 1500KB/s or 1.5MB/s. A 1 gigabyte file would take over 660 seconds or 11 minutes to transfer.

USB 2

The second version of the specification greatly increased the performance of the USB device. In addition to the USB 1 configurations, another configuration was introduced: hi speed.

Hi speed allows for up to 480Mbit/s. This is about 60MB/s. A 1 gigabyte file would take less than 20 seconds to transfer.

USB 3

The third version of the specification, yet again, greatly increased the performance of the USB device. In addition to the USB 1 and 2 configurations, another configuration was introduced.

The new speed, in theory, allows for up to 5000Mbit/s or 5Gbits/s. This is about 625MB/s. A 1 gigabyte file would take less than 2 seconds to transfer.

Comments (0)

Post a comment

  • Name:
  • Post:
  • Challenge:

Register or login to post comments easier.


Vantasy World Copyright 2011 - 2017. Vantasy World is a project developed by Vantasy Online. Privacy Policy.