Accelerated Hub Architecture (AHA) (also called Intel Hub Architecture) is an Intel 800-series chipset design that uses a dedicated bus to transfer data between the two main processor chips instead of using the Peripheral Component Interconnect (PCI) bus, which was used in previous chipset architectures. The Accelerated Hub Architecture provides twice the bandwidth of the traditional PCI bus architecture at 266 MB per second. The Accelerated Hub Architecture consists of a memory controller hub and an input/output (I/O) controller hub (a controller directs or manages access to devices).
The memory controller hub provides the central processing unit (CPU) interface, the memory interface, and the accelerated graphics port (AGP) interface. The memory controller hub supports single or dual processors with up to 1 GB of memory. The memory controller hub also allows for simultaneous processing, which enables more life-like audio and video capabilities.
The I/O controller hub provides a direct connection from the memory to the I/O devices, which includes any built-in modem and audio controllers, hard drives, Universal Serial Bus (USB) ports, and PCI add-in cards. The I/O controller hub also includes the Alert on LAN (local area network) feature that sounds an alert when software failures or system intrusion occurs.