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Technical Reference Guide www.hp.com 2-17

System Overview

2.4 System Architecture

The systems covered in this guide feature an architecture based on the Intel Q965 Express

chipset (Figure 2-13). All systems covered in this guide include the following key components:

■ Intel Pentium 4, Pentium D, or Core 2 Duo processor.

■ Intel Q965 Express chipset - Includes Q965 GMCH north bridge and 82801 ICH8-DO south

bridge

■ SMC SCH5317 super I/O controller supporting PS/2 keyboard and mouse peripherals

■ ALC262 audio controller supporting line in, line out, microphone in, and headphones out

■ Intel 82566DM 10/100/1000 network interface controller

The Q965 chipset provides a major portion of system functionality. Designed to compliment the

latest Intel processors, the Q965 GMCH intefaces with the processor through a

533/800/1066-MB Front-Side Bus (FSB) and communicates with the ICH8-DO component

through the Direct Media Interface (DMI). The integrated graphics controller of the Q965 may

be upgraded through a PCI Express x16 graphics slot. All systems include at least one PCI 2.3

slot and feature as standard a serial ATA (SATA) hard drive. The USDT model supports a

Slimline Optical Drive through a legacy parallel ATA 100 interface.

Table 2-3 lists the differences between models by form factor.

Notes:

[1] Supports an ADD2 card in the reverse-layout. or a PCIe x16 graphics card (with PCIe riser card

installed)

[2] Slot not accessible if PCI riser is installed.

[3] Full-height slot (requires PCI riser)

[4] Low-profile slots without PCI riser, full-height slots with optional PCI riser

[5] Requires adapter.

[6] 2nd serial port requires adapter

Table 2-3.

Architectural Differences By Form Factor

Model USDT SFF ST MT CMT

Memory sockets 3 4 4 4 4

PCI Express x16

graphics slot?

Yes [1] Yes [2] Yes [2] Yes Yes

# of PCI Express x1

slots

0 Yes [2] Yes [2] Yes Yes

# of PCI 2.3 slots 1 [3] 2 [4] 2 [4] 2 4

Serial / parallel ports Optional [5] Standard [6] Standard [6] Standard [6] Standard [6]

SATA interfaces 1 3 3 4 4

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