What is Southbridge? - Definition from WhatIs.com
Part of the Personal computing glossary:

Southbridge is an Intel chipset that manages the basic forms of input/output ( I/O ) such as Universal Serial Bus ( USB ), serial , audio, Integrated Drive Electronics ( IDE ), and Industry Standard Architecture ( ISA ) I/O in a computer. Southbridge is one of two chipsets that are collectively called Northbridge /Southbridge. Northbridge controls the processor , memory , Peripheral Component Interconnect ( PCI ) bus , Level 2 cache , and all Accelerated Graphics Port ( AGP ) activities. Unlike Northbridge, Southbridge consists of one chip, which sits on Northbridge's PCI bus.

The Intel Hub Architecture (IHA) has replaced the Northbridge/Southbridge chipset. The IHA chipset has two parts also, the Graphics and AGP Memory Controller Hub (GMCH) and the I/O Controller Hub (ICH). The IHA architecture is used in Intel's 800 series chipsets, which is the first chipset architecture to move away from the Northbridge/Southbridge design.

This was last updated in September 2005
Contributor(s): Jason Rush
Posted by: Margaret Rouse

Related Terms


  • wearables security

    - Wearables security is the area of system and data protection concerned with the particular risks related to computing devices worn on the user's body such as smartwatches, headsets and fitness trac... (WhatIs.com)

  • spatial sensing

    - Spatial sensing is the detection, measuring and analysis of an environment's space and objects in real-time for the purposes of mapping them. (WhatIs.com)

  • 360-degree VR (360-degree virtual reality)

    - 360-degree VR (360-degree virtual reality) is an audiovisual simulation of an altered, augmented or substituted environment that surrounds the user, allowing them to look around them in all directi... (WhatIs.com)


  • Personal computing

    - Terms related to personal computers, including definitions about computers sold as consumer products and words and phrases about laptops, tablets and smartphones.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question. Find an Answer.Powered by ITKnowledgeExchange.com

Ask An IT Question

Get answers from your peers on your most technical challenges

Ask Question

Tech TalkComment



    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.