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Technical Reference Guide www.hp.com 3-1

Processor/Memory Subsystem

3.1 Introduction

This chapter describes the processor/memory subsystem. These systems support the Intel

Pentium and Core processor families and use the Q35 chipset (Figure 3-1). These systems

support PC2-6400 and PC2-5300 DDR2 memory modules.

Figure 3-1. Processor/Memory Subsystem Architecture

This chapter includes the following topics:

■ Intel Pentium processor (3.2)

■ Memory subsystem (3.3)

Processor

Q35

GMCH

Cntrl

SDRAM

XMM1

Channel A

DIMM

XMM3

XMM4 [1]

XMM2 [1]

FSB I/F

Note:

[1] Not present on USDT form factor.

Intel

Channel B

SODIMM

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HP Compaq dc7800 Series Specifications

General

Processor	Intel Core 2 Duo, Intel Pentium Dual-Core, Intel Celeron
Chipset	Intel Q35 Express
Memory	Up to 8 GB DDR2 SDRAM
Audio	Integrated High Definition Audio
Form Factor	Ultra-slim desktop, Small form factor, Convertible minitower
Storage	80GB to 500GB SATA HDD
Graphics	Integrated Intel Graphics Media Accelerator 3100
Optical Drive	DVD-ROM, DVD+/-RW
Network	Integrated Gigabit Network Connection
Ports	USB 2.0, VGA, serial, parallel, audio in/out
Operating System	Windows Vista, Windows XP, FreeDOS
Expansion Slots	1 low-profile PCI, 1 low-profile PCI Express x16
Power Supply	240W