| Short for Intel Hub Architecture, IHA is the replacement for the Northbridge and Southbridge found on computer motherboards. The IHA is found on all of Intel's 800 series chipsets, and much like the predecessor, the IHA has two parts, the GMCH and the ICH. The GMCH, or Graphics and AGP Memory Control Hub for short, is similar to the Northbridge and helps control the AGP and memory. The ICH, or I/O Controller Hub for short, is similar to the Southbridge and is responsible for the I/O ports and PCI controller. Also see: Motherboard definitions, Northbridge, Southbridge
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