System Overview

Figure 1-3 on page 19 illustrates a typical PC system consisting of the major elements introduced in the following subsections.

Figure 1-3. Typical PC System Board Layout and Block Diagram

Pentium® 4 Processor

The system processor executes the OS, application programs, and device drivers.

Memory Control Hub (MCH)

The MCH is connected to the IO Control Hub (ICH) by the high speed, 11-bit Hub Interface (HI) link. It provides the following functions:

  • It incorporates the system memory controller.

  • It provides the interface between the AGP device and system memory via the point-to-point AGP (Accelerated Graphics ...

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