HP dc7800 tower manual System Power States, State System Condition, Power Transition OS Restart

Page 87

Power and Signal Distribution

7.3.3 Power Management

These systems include power management functions designed to conserve energy. These functions are provided by a combination of hardware, firmware (BIOS) and software. The system provides the following power management support:

■ACPI v2.0 compliant (ACPI modes C1, S1, and S3-S5)

■APM 1.2 compliant

■U.S. EPA Energy Star 3.0 and 4.0 compliant

Table 7-6 shows the comparison in power states.

Table 7-6.

System Power States

 

 

 

 

 

Power

 

Power

Transition

OS Restart

State

System Condition

Consumption

To S0 by [2]

Required

G0, S0, D0

System fully on. OS and

Maximum

N/A

No

 

application is running, all

 

 

 

 

components.

 

 

 

 

 

 

 

 

G1, S1, C1, D1

System on, CPU is executing and

Low

< 2 sec after

No

 

data is held in memory. Some

 

keyboard or

 

 

peripheral subsystems may be on

 

pointing device

 

 

low power. Monitor is blanked.

 

action

 

 

 

 

 

 

G1, S2/3, C2,

System on, CPU not executing,

Low

< 5 sec. after

No

D2 (Standby/or

cache data lost. Memory is

 

keyboard, pointing

 

suspend)

holding data, display and I/O

 

device, or power

 

 

subsystems on low power.

 

button action

 

 

 

 

 

 

G1, S4, D3

System off. CPU, memory, and

Low

<25 sec. after

Yes

(Hibernation)

most subsystems shut down.

 

power button

 

 

Memory image saved to disk for

 

action

 

 

recall on power up.

 

 

 

 

 

 

 

 

G2, S5, D3cold

System off. All components either

Minimum

<35 sec. after

Yes

 

completely shut down or receiving

 

power button

 

 

minimum power to perform system

 

action

 

 

wake-up.

 

 

 

 

 

 

 

 

G3

System off (mechanical). No power

None

—

—

 

to any internal components except

 

 

 

 

RTC circuit. [1]

 

 

 

NOTES:

Gn = Global state.

Sn = Sleep state.

Cn = ACPI state.

Dn = PCI state.

[1]Power cord is disconnected for this condition.

[2]Actual transition time dependent on OS and/or application software.

 

Technical Reference Guide

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Contents September Technical Reference GuideTechnical Reference Guide Contents Processor/Memory Subsystem System SupportInput/Output Interfaces Integrated Graphics Subsystem Power and Signal DistributionError Messages and Codes Index System BiosOnline Viewing IntroductionAbout this Guide Additional Information SourcesValues Serial NumberNotational Conventions Special NoticesCommon Acronyms and Abbreviations Acronyms and AbbreviationsAcronym or Abbreviation Description Cmos CDSCGA CMCEscd EisaEPP EideLCD IRQISA LANPCA ODDPAL PataSgram SdvoSEC SecamVAC URLUSB UTPIntroduction Introduction System OverviewFeatures Feature Difference Matrix by Form Factor Sodimm Dimm1ODD System Architecture Architectural Differences By Form FactorFunction HP Compaq dc7900 Business PC Architecture, Block diagram Intel Processor Support Chipset Chipset Components and FunctionalityComponents Function Component Name Function Support ComponentsSystem Memory Support Component FunctionsNetwork Interface Controller Mass StorageSerial Interface Universal Serial Bus InterfaceIntegrated Graphics Controller Graphics SubsystemAudio Subsystem Integrated Graphics Subsystem StatisticsParameter Operating Non-operating SpecificationsEnvironmental Specifications Factory Configuration Power Supply Electrical SpecificationsParameter Usdt SFF CMT Physical SpecificationsCD-RW/DVD-ROM Combo Optical Drive SpecificationsHP SuperMulti LightScribe ParameterParameter 80 GB 160 GB 250 GB Hard Drive SpecificationsProcessor/Memory Subsystem Architecture Processor/Memory SubsystemIntel Processor Overview Intel ProcessorsForm Processor Changing/UpgradingSupported Processors partial listing ClockMemory Subsystem Channel a Channel B Socket Socket 2 Socket 4 Total Memory UpgradingMemory Mapping and Pre-allocation Memory Socket LoadingSystem Memory Map for maximum of 8 gigabytes System Support PCI Bus OverviewPCI 2.3 Bus Operation PCI Component Function # Device # Wired to PCI Component Configuration Access PCI BusPCI Bus Mastering Devices PCI Express Bus OperationSoftware/Driver Layer Transaction Protocol LayerLink Layer PCI Power Management SupportOption ROM Mapping PCI InterruptsPCI Connectors PCI 2.3 ConnectorPCI 2.3 Bus Connector Pinout PCI Express Bus Connector Pinout PCI Express ConnectorsMode Apic ModeSystem Resources InterruptsPCI Interrupt Distribution Direct Memory AccessClearing Cmos Real-Time Clock and Configuration MemorySecurity Functions Configuration Memory Cmos MapSystem Management Standard Cmos LocationsInterface Security Power-On / Setup PasswordSetup Password Cable Lock ProvisionAcpi Wake-Up Event System Wakes From Power ManagementSmart Cover Lock Optional Acpi Wake-Up EventsSystem Operational Status LED Indications System Status PowerLED Beeps Action RequiredSystem Status Thermal Sensing and CoolingSystem I/O Map Register Map and Miscellaneous FunctionsPort Function System I/O MapGpio Functions ICH10 FunctionsSIO Controller Functions Input/Output Interfaces Pin Description Pin Sata Connector PinoutSATA/eSATA Interfaces Sata interfaceESATA interface Optional eSATA Bracket/Cable AssemblyDiskette Drive Interface Pin Signal Description Pin Diskette Drive Connector PinoutSerial Interface DB-9 Serial Connector PinoutParallel Interface Support Standard Parallel Port ModeEnhanced Parallel Port Mode Extended Capabilities Port ModeParallel Interface Connector DB-25 Parallel Connector PinoutPin Signal Function Keyboard Interface Operation Keyboard/Pointing Device InterfaceData Keyboard/Pointing Device Interface ConnectorKeyboard/Pointing Device Connector Pinout Pointing Device Interface OperationICH10 USB Port Mapping USB ConnectorController Signals USB Connector Location all form factors Universal Serial Bus InterfaceUSB Color Code USB Connector PinoutUSB Cable Data USB Cable Length DataAudio Subsystem Audio Subsystem Functional Block DiagramHD Audio Controller HD Audio Link BusAudio Multistreaming ADC/DAC Audio SpecificationsHD Audio Subsystem Specifications Parameter MeasurementLAN I/F NIC Network Interface ControllerPower Management Support Wake-On-LAN SupportAlert Standard Format Support Parameter Compatibility standard orprotocol NIC ConnectorNIC Specifications NIC SpecificationsIntegrated Graphics Subsystem RGB Functional DescriptionGMA 4500 Memory Allocation Sdram Installed Maximum Memory AllocationResolution Maximum Refresh Rate Analog Digital Monitor Display ModesIGC Standard 2D Display Modes Upgrading Monitor Connectors Analog Monitor ConnectorDB-15 Monitor Connector Pinout Pin Signal DisplayPort ConnectorIntegrated Graphics Subsystem Power and Signal Distribution Power DistributionUsdt Power Distribution Usdt 135-Watt Power Supply Unit Specifications 2 SFF/CMT Power DistributionMin Range Current Max Surge Tolerance Loading Ripple SFF 240-Watt Power Supply Unit SpecificationsRange or Min Current Max Surge Tolerance Loading Ripple CMT 365-Watt Power Supply Unit SpecificationsEnergy Star Compliancy Shows the power supply cabling for CMT systemsPressed Power Button Results Power ControlPower Button Power Button ActionsPower LED Indications Condition Wake-On-LAN Wake Up EventsConsumption To S0 by Required System Power StatesPower Transition OS Restart State System ConditionCR1 +5 VDC LED Signal DistributionSystem Board Component Designations Power and Signal Distribution System Bios ROM Flashing UpgradingChangeable Splash Screen Memory Detection and Configuration Boot FunctionsBoot Device Order Network Boot F12 SupportBoot Error Codes Boot Error CodesVisual power LED Audible speaker Meaning Function Mode Client Management FunctionsClient Management Functions INT15 Subsystem Temperature StatusSystem ID and ROM Type System ID NumbersType Data Smbios FunctionsManagement Engine Functions USB Legacy SupportBeeps Power LED Probable Cause Error Messages and CodesBeep/Power LED Codes Table A-1 Beep/Power LED CodesPower-On Self Test Post Messages Table A-2 Table A-2 Error Message Probable CauseTable A-3 System Error Messages Probable Cause System Error MessagesMessage Probable Cause Memory Error MessagesMemory Error Messages Table A-4Table A-5 Keyboard Error Messages Probable Cause Keyboard Error MessagesTable A-7 Video Graphics Error Messages Probable Cause Printer Error MessagesVideo Graphics Error Messages Table A-6 Printer Error Messages Probable CauseTable A-8 Diskette Drive Error Messages Probable Cause Diskette Drive Error MessagesTable A-9 Serial Interface Error Messages Probable Cause Serial Interface Error MessagesModem Communications Error Messages System Status Error Messages System Status Error MessagesTable A-11 Table A-12 Hard Drive Error Messages Probable Cause Hard Drive Error MessagesXx = 03, Hard drive read/write compare test Table A-13 Hard Drive Error Messages Probable Cause Audio Error Messages Table A-14 Video Graphics Error Messages Probable CauseTable A-15 Audio Error Messages Probable Cause Table A-17 Network Interface Error Messages Probable Cause 17 DVD/CD-ROM Error MessagesNetwork Interface Error Messages DVD/CD-ROM Error MessagesTable A-18 Scsi Interface Error Messages Scsi Interface Error Messages 65xx-xx, 66xx-xxPointing Device Interface Error Messages 8601-xx Error Messages and Codes Numerics IndexIndex
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dc7800 tower specifications

The HP dc7800 Tower is a powerful desktop computer designed for professional and enterprise environments. Known for its stability, performance, and versatility, this model has secured its place in a variety of business settings. Launched in the mid-2000s, it embodies HP’s commitment to quality and innovation.

One of the main features of the HP dc7800 is its form factor. The tower configuration allows for easy upgrades and maintenance, providing ample space for additional hard drives, memory, and other components. This level of accessibility makes it ideal for businesses that need to adapt their systems to changing requirements.

The dc7800 is powered by Intel's Core 2 Duo processors, offering dual-core technology that enhances multitasking capabilities. With clock speeds ranging from 1.8 GHz to 3.0 GHz, this system can handle demanding applications with relative ease. It also supports Intel's vPro technology, which allows for remote management and security features, making it an excellent choice for organizations prioritizing IT control.

Another notable characteristic is the support for up to 8GB of DDR2 RAM. This allows for efficient data processing and improved performance when running multiple applications simultaneously. Additionally, the dc7800 features multiple storage options, accommodating both SATA hard drives and solid-state drives, which can significantly enhance boot times and overall system responsiveness.

Connectivity options on the HP dc7800 are robust. It includes a variety of USB ports, audio jacks, and optional legacy ports, ensuring compatibility with a wide range of peripherals and accessories. Networking capabilities are also prominent, with built-in Gigabit Ethernet providing high-speed internet access.

Furthermore, the desktop tower is designed with energy efficiency in mind. It meets ENERGY STAR certification standards, which not only helps reduce operational costs but also minimizes environmental impact.

Overall, the HP dc7800 Tower embodies a blend of performance, expandability, and energy efficiency, making it a reliable choice for businesses in need of a robust desktop solution. With its legacy of dependability and its suite of modern technologies, it continues to serve as a valuable asset in enterprise environments.
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