HP 7800 Specifications

Technical Reference GuideHP Compaq dc7800 SeriesBusiness Desktop ComputersDocument Part Number: 461444-001October 2007This document provides informati

1-4 www.hp.com Technical Reference GuideIntroduction1.6 Common Acronyms and AbbreviationsTable 1-1 lists the acronyms and abbreviations used in this

8-8 www.hp.com Technical Reference GuideSYSTEM BIOS8.6 USB Legacy SupportThe system BIOS ROM checks the USB port, during POST, for the presence of a

Technical Reference Guide www.hp.com Index-1IndexNumerics8259 Mode 4-7AAdvanced Digital Display (ADD2) 6-2AMT 2-2APIC Mode 4-7Audio codec 2-8Audio Spe

Index-2 www.hp.com Technical Reference GuideIndexROM flashing 8-2SSATA 5-1SATA Connector 5-3SDVO 6-2serial interface 5-6Serial Interface Connector 5-6

Technical Reference Guide www.hp.com 1-5IntroductionCh Channel, chaptercm centimeterCMC cache/memory controllerCMOS complimentary metal-oxide semicond

1-6 www.hp.com Technical Reference GuideIntroductionESCD Extended System Configuration Data (format)EV Environmental Variable (data)ExCA Exchangeable

Technical Reference Guide www.hp.com 1-7IntroductionKb/KB kilobits/kilobytes (x 1024 bits/x 1024 bytes)Kb/s kilobits per secondkg kilogramKHz kiloher

1-8 www.hp.com Technical Reference GuideIntroductionPC Personal computerPCA Printed circuit assemblyPCI peripheral component interconnectPCI-E PCI Exp

Technical Reference Guide www.hp.com 1-9IntroductionSGRAM Synchronous Graphics RAMSIMD Single instruction multiple dataSIMM single in-line memory modu

1-10 www.hp.com Technical Reference GuideIntroductionVAC Volts alternating currentVDC Volts direct currentVESA Video Electronic Standards AssociationV

Technical Reference Guide www.hp.com 2-12System Overview2.1 IntroductionThe HP Compaq dc7800 Business PC personal computers (Figure 2-1) deliver an ou

2-2 www.hp.com Technical Reference GuideSystem Overview2.2 FeaturesThe following standard features are included on all models unless otherwise indicat

Technical Reference Guide www.hp.com 2-3System OverviewTable 2-1 shows the differences in features between the different PC series based on form facto

© Copyright 2007 Hewlett-Packard Development Company, L.P.The information contained herein is subject to change without notice. Microsoft, MS-DOS, Win

2-4 www.hp.com Technical Reference GuideSystem Overview2.3 System ArchitectureThe systems covered in this guide feature an architecture based on the I

Technical Reference Guide www.hp.com 2-5System OverviewFigure 2-2. HP Comapq dc7800 Business PC Architecture, Block diagramParallel I/F [2]IntelProces

2-6 www.hp.com Technical Reference GuideSystem Overview2.3.1 Intel Processor SupportThe models covered in this guide are designed to support the follo

Technical Reference Guide www.hp.com 2-7System Overview2.3.2 ChipsetThe Intel Q35 Express chipset consists of a Graphics Memory Controller Hub (GMCH)

2-8 www.hp.com Technical Reference GuideSystem Overview2.3.3 Support ComponentsInput/output functions not provided by the chipset are handled by other

Technical Reference Guide www.hp.com 2-9System Overview2.3.5 Mass StorageAll models support at least two mass storage devices, with one being external

2-10 www.hp.com Technical Reference GuideSystem Overview2.3.9 Graphics SubsystemThese systems use the Q35 GMCH component, which includes an integrated

Technical Reference Guide www.hp.com 2-11System Overview2.4 SpecificationsThis section includes the environmental, electrical, and physical specificat

2-12 www.hp.com Technical Reference GuideSystem OverviewNOTES: [1] System configured with 1 hard drive, 1 diskette drive (SFF and CMT only), and no PC

Technical Reference Guide www.hp.com 2-13System OverviewTable 2-9Diskette Drive Specifications Parameter MeasurementMedia Type 3.5 in 1.44 MB/720 KB d

Technical Reference Guide www.hp.com iiiContents1Introduction1.1 About this Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14 www.hp.com Technical Reference GuideSystem OverviewNOTE[1] USDT models use “slim” drive that uses an IDE interface through SATA bridge.[2] Requir

Technical Reference Guide www.hp.com 2-15System OverviewNOTES:[1] USDT supports 2.5-in. drives only.[2] USDT supports 1.5 Gb/s drives only.[3] USDT su

2-16 www.hp.com Technical Reference GuideSystem Overview

Technical Reference Guide www.hp.com 3-13Processor/Memory Subsystem3.1 IntroductionThis chapter describes the processor/memory subsystem. These system

3-2 www.hp.com Technical Reference GuideProcessor/Memory Subsystem3.2 Intel ProcessorsThese systems each feature an Intel processor in a FC-LGA775 pac

Technical Reference Guide www.hp.com 3-3Processor/Memory Subsystem3.2.2 Processor Changing/UpgradingAll models use the LGA775 ZIF (Socket T) mounting

3-4 www.hp.com Technical Reference GuideProcessor/Memory Subsystem3.3 Memory SubsystemAll models support non-ECC PC2-5300 and PC2-6400 DDR2 memory. Th

Technical Reference Guide www.hp.com 3-5Processor/Memory Subsystem3.3.1 Memory UpgradingTable 3-2 shows suggested memory configurations for these syst

3-6 www.hp.com Technical Reference GuideProcessor/Memory SubsystemFigure 3-2. System Memory Map (for maximum of 8 gigabytes)✎All locations in memory

Technical Reference Guide www.hp.com 4-14System Support4.1 IntroductionThis chapter covers subjects dealing with basic system architecture and covers

iv www.hp.com Technical Reference GuideContents3 Processor/Memory Subsystem3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-2 www.hp.com Technical Reference GuideSystem SupportTable 4-1 shows the standard configuration of device numbers and IDSEL connections for component

Technical Reference Guide www.hp.com 4-3System SupportThe PCI bus supports a bus master/target arbitration scheme. A bus master is a device that has b

4-4 www.hp.com Technical Reference GuideSystem SupportLink LayerThe link layer provides data integrity by adding a sequence information prefix and a C

Technical Reference Guide www.hp.com 4-5System Support4.2.6 PCI ConnectorsPCI 2.3 ConnectorFigure 4-2. 32-bit, 5.0-volt PCI 2.3 Bus ConnectorTable 4

4-6 www.hp.com Technical Reference GuideSystem SupportPCI Express ConnectorsFigure 4-3. PCI Express Bus ConnectorsTable 4-4.PCI Express Bus Connecto

Technical Reference Guide www.hp.com 4-7System Support4.3 System ResourcesThis section describes the availability and basic control of major subsystem

4-8 www.hp.com Technical Reference GuideSystem SupportNOTES: [1] SFF and CMT only[2] CMT onlyThe PCI interrupts can be configured by PCI Config

Technical Reference Guide www.hp.com 4-9System Support4.4 Real-Time Clock and Configuration MemoryThe Real-time clock (RTC) and configuration memory

4-10 www.hp.com Technical Reference GuideSystem Support4.4.2 Standard CMOS LocationsTable 4-6 describes standard configuration memory locations 0Ah-3F

Technical Reference Guide www.hp.com 4-11System SupportPower-On / Setup PasswordThese systems include a power-on and setup passwords, which may be ena

Technical Reference Guide www.hp.com vContents5.7.3 Keyboard/Pointing Device Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . .

4-12 www.hp.com Technical Reference GuideSystem SupportLevel 0—Cover removal indication is essentially disabled at this level. During POST, status bit

Technical Reference Guide www.hp.com 4-13System Support4.5.3 System StatusThese systems provide a visual indication of system boot, ROM flash, and ope

4-14 www.hp.com Technical Reference GuideSystem Support✎Units using chassis and CPU fans must have both fans connected to their corresponding headers

Technical Reference Guide www.hp.com 4-15System SupportNOTE: Assume unmarked gaps are unused, reserved, or used by functions that employ variable I/O

4-16 www.hp.com Technical Reference GuideSystem Support Chassis and board ID Hood (cover) sensor and lock detect Media card reader detect S4 stat

Technical Reference Guide www.hp.com 5-15Input/Output Interfaces5.1 IntroductionThis chapter describes the standard interfaces that provide input and

5-2 www.hp.com Technical Reference GuideInput/Output Interfaces5.2 SATA InterfaceThese systems provide one, three, or four serial ATA (SATA) interface

Technical Reference Guide www.hp.com 5-3Input/Output Interfaces5.3 PATA InterfaceThe USDT system board includes a SATA-to-PATA bridge and slim IDE con

5-4 www.hp.com Technical Reference GuideInput/Output Interfaces5.4 Diskette Drive InterfaceThe SFF and CMT form factors support a diskette drive throu

Technical Reference Guide www.hp.com 5-5Input/Output InterfacesThe SFF and CMT form factors use a standard 34-pin connector for diskette drives (refer

vi www.hp.com Technical Reference GuideContents8SYSTEM BIOS8.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-6 www.hp.com Technical Reference GuideInput/Output Interfaces5.5 Serial InterfaceSystems covered in this guide may include one RS-232-C type serial

Technical Reference Guide www.hp.com 5-7Input/Output Interfaces5.6 Parallel InterfaceSystems covered in this guide may include a parallel interface fo

5-8 www.hp.com Technical Reference GuideInput/Output Interfaces5.6.4 Parallel Interface ConnectorFigure 5-5 and Table 5-5 show the connector and pinou

Technical Reference Guide www.hp.com 5-9Input/Output Interfaces5.7 Keyboard/Pointing Device InterfaceThe keyboard/pointing device interface function

5-10 www.hp.com Technical Reference GuideInput/Output Interfaces5.7.2 Pointing Device Interface OperationThe pointing device (typically a mouse) con

Technical Reference Guide www.hp.com 5-11Input/Output Interfaces5.8 Universal Serial Bus InterfaceThe Universal Serial Bus (USB) interface provides a

5-12 www.hp.com Technical Reference GuideInput/Output Interfaces5.8.2 USB Cable DataThe recommended cable length between the host and the USB device s

Technical Reference Guide www.hp.com 5-13Input/Output Interfaces5.9 Audio SubsystemThese systems use the HD audio controller of the 82801 component to

5-14 www.hp.com Technical Reference GuideInput/Output Interfaces5.9.1 HD Audio ControllerThe HD Audio Controller is a PCI Express device that is integ

Technical Reference Guide www.hp.com 5-15Input/Output Interfaces5.9.4 Audio SpecificationsThe specifications for the HD Audio subsystem are listed in

Technical Reference Guide www.hp.com 1-11Introduction1.1 A b o u t t h i s G u i d eThis guide provides technical information about HP Compaq dc78

5-16 www.hp.com Technical Reference GuideInput/Output Interfaces5.10 Network Interface ControllerThese systems provide 10/100/1000 Mbps network suppor

Technical Reference Guide www.hp.com 5-17Input/Output Interfaces5.10.1 Wake-On-LAN SupportThe NIC supports the Wired-for-Management (WfM) standard of

5-18 www.hp.com Technical Reference GuideInput/Output Interfaces5.10.4 NIC ConnectorFigure 5-12 shows the RJ-45 connector used for the NIC interface.

Technical Reference Guide www.hp.com 6-16Integrated Graphics Subsystem6.1 IntroductionThis chapter describes graphics subsystem that is integrated int

6-2 www.hp.com Technical Reference GuideIntegrated Graphics Subsystem6.2 Functional DescriptionThe Intel Q35 GMCH component includes an Intel Integrat

Technical Reference Guide www.hp.com 6-3Integrated Graphics SubsystemThe IGC includes 2D and 3D accelerator engines working with a deeply-pipelined pr

6-4 www.hp.com Technical Reference GuideIntegrated Graphics SubsystemThe Microsoft Direct Diagnostic tool included in most versions of Windows may be

Technical Reference Guide www.hp.com 6-5Integrated Graphics Subsystem6.4 UpgradingThe PCIe x16 slot of SFF and CMT systems can accept a normal-layout

6-6 www.hp.com Technical Reference GuideIntegrated Graphics Subsystem6.5 Monitor ConnectorsAll form factors provide an analog VGA connector. The USDT

Technical Reference Guide www.hp.com 6-7Integrated Graphics Subsystem6.5.2 Digital Monitor ConnectorThe USDT system includes a DVI-D connector for att

1-2 www.hp.com Technical Reference GuideIntroduction

6-8 www.hp.com Technical Reference GuideIntegrated Graphics Subsystem

Technical Reference Guide www.hp.com 7-17Power and Signal Distribution7.1 IntroductionThis chapter describes the power supplies and discusses the meth

7-2 www.hp.com Technical Reference GuidePower and Signal DistributionTable 7-1 lists the specifications of the external supply.NOTES:Total continuous

Technical Reference Guide www.hp.com 7-3Power and Signal DistributionNOTES:Total continuous power should not exceed 240 watts. Total surge power (<

7-4 www.hp.com Technical Reference GuidePower and Signal Distribution7.2.3 CMT Power DistributionThe CMT form factor uses a power supply unit internal

Technical Reference Guide www.hp.com 7-5Power and Signal DistributionFigure 7-5 shows the power supply cabling for CMT systems.NOTES: Connectors not

7-6 www.hp.com Technical Reference GuidePower and Signal Distribution7.3 Power Con trolThe generation of +3, +5, and +12 VDC is controlled digitally w

Technical Reference Guide www.hp.com 7-7Power and Signal DistributionA dual-color LED located on the front panel (bezel) is used to indicate system po

7-8 www.hp.com Technical Reference GuidePower and Signal Distribution7.3.2 Wake Up EventsThe PS On signal can be activated with a power “wake-up” of

Technical Reference Guide www.hp.com 7-9Power and Signal Distribution7.3.3 Power ManagementThese systems include power management functions designed t

Technical Reference Guide www.hp.com 1-3Introduction1. 4 S e r i a l N u m b e rThe serial number is located on a sticker placed on the exterior cab

7-10 www.hp.com Technical Reference GuidePower and Signal Distribution7.4 Signal DistributionTable 7-7 lists the reference designators for LEDS, conne

Technical Reference Guide www.hp.com 7-11Power and Signal DistributionFigure 7-6 shows pinouts of headers used on the sytem boards.NOTE: No polarity

7-12 www.hp.com Technical Reference GuidePower and Signal Distribution

Technical Reference Guide www.hp.com 8-18SYSTEM BIOS8.1 IntroductionThe System Basic Input/Output System (BIOS) of the computer is a collection of mac

8-2 www.hp.com Technical Reference GuideSYSTEM BIOS8.2 ROM Flashing The system BIOS firmware is contained in a flash ROM device that can be re-written

Technical Reference Guide www.hp.com 8-3SYSTEM BIOS8.3 Boot FunctionsThe BIOS supports various functions related to the boot process, including those

8-4 www.hp.com Technical Reference GuideSYSTEM BIOS✎Refer to Chapter 3, “Processor/Memory Subsystem” for the SPD format and DIMM data specific to this

Technical Reference Guide www.hp.com 8-5SYSTEM BIOS8.4 Client Management FunctionsTable 8-2 provides a partial list of the client management BIOS fun

8-6 www.hp.com Technical Reference GuideSYSTEM BIOS8.4.1 System ID and ROM TypeDiagnostic applications can use the INT 15, AX=E800h BIOS function to i

Technical Reference Guide www.hp.com 8-7SYSTEM BIOS8.5 SMBIOSIn support of the DMI specification, PnP functions 50h and 51h are used to retrieve the S