Home / Computers / ICH – I/O Controller Hub

ICH – I/O Controller Hub

Vangie Beal
Last Updated May 24, 2021 7:45 am

Short for I/O Controller Hub, ICH is an implementation of the Accelerated Hub Architecture (ACHA), often referred to as the Southbridge, a reference to the older, three-tier chipset design. It is the slower end of the ACHA, and most I/O devices are connected to the hub through it.

Intel Hub Architecture

[Image Source: INSIDE THE PC, Nigel S. Smith, University of Cambridge Computing Service]