Short for "Intel Hub Architecture" IHA is the replacement for the north bridge and south bridge found on computer motherboard. The IHA is found on all of Intel's 800 series chip sets, and much like the processor, the IHA has two ports, the GMCH and the ICH.
GMCH (Graphic Memory Control Hub)- The GMCH or graphic and AGP Memory control Hub for short is similar to the north bridge and helps control the AGP and memory.
ICH (Intel Control Hub)- The ICH or I/O controller hub for short is similar to the South bridge and is responsible for the I/O ports and PCI controller.
GMCH (Graphic Memory Control Hub)- The GMCH or graphic and AGP Memory control Hub for short is similar to the north bridge and helps control the AGP and memory.
ICH (Intel Control Hub)- The ICH or I/O controller hub for short is similar to the South bridge and is responsible for the I/O ports and PCI controller.
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