Intel D925XBC, D925XCV Electrical Considerations, DC Loading, Add-in Board Considerations

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Technical Reference

2.11 Electrical Considerations

2.11.1DC Loading

Table 37 lists the DC loading characteristics of the board. This data is based on a DC analysis of all active components within the board that impact its power delivery subsystems. The analysis does not include PCI add-in cards. Minimum values assume a light load placed on the board that is similar to an environment with no applications running and no USB current draw. Maximum values assume a load placed on the board that is similar to a heavy gaming environment with a

500 mA current draw per USB port. These calculations are not based on specific processor values or memory configurations but are based on the minimum and maximum current draw possible from the board’s power delivery subsystems to the processor, memory, and USB ports.

Use the datasheets for add-in cards, such as PCI, to determine the overall system power requirements. The selection of a power supply at the system level is dependent on the system’s usage model and not necessarily tied to a particular processor speed.

Table 37. DC Loading Characteristics

 

 

 

 

DC Current at:

 

 

 

 

 

 

 

 

 

 

 

Mode

DC Power

+3.3 V

+5 V

 

+12 V

 

-12 V

+5 VSB

 

 

 

 

 

 

 

 

 

Minimum loading

200.00 W

3.30 A

10.00 A

 

9.00 A

 

0.03 A

0.80 A

 

 

 

 

 

 

 

 

 

Maximum loading

300.00 W

6.00 A

14.00 A

 

16.00 A

 

0.10 A

1.40 A

 

 

 

 

 

 

 

 

 

2.11.2Add-in Board Considerations

The boards are designed to provide 2 A (average) of +5 V current for each add-in board. The total

+5 V current draw for add-in boards for the boards is as follows:

•A fully loaded Desktop Board D925XCV (all six expansion slots and the PCI Express x16 slot filled) must not exceed 14 A.

•A fully loaded Desktop Board D925XBC (all three expansion slots and the PCI Express x16 slot filled) must not exceed 8 A.

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Contents D925XCV/D925XBC Revision Revision History Date Revision HistoryPreface Other Common Notation Contents Technical Reference Contents Overview of Bios FeaturesFigures Chassis Intrusion Connector Page Board Differences PCI Bus Terminology ChangeSummary of Board Differences Feature Summary Feature SummaryOverview Manufacturing Options Manufacturing OptionsDesktop Board D925XCV Components Board LayoutsItem/callout from Figure Description D925XCV Components Shown in FigureDesktop Board D925XBC Components D925XBC Components Shown in Figure Block Diagram Block DiagramOnline Support For information about Refer to Power supply connectors 1.1,Processor To find information about… Visit this World Wide Web siteSystem Memory Supported Memory ConfigurationsMemory Channel and Dimm Configuration Memory ConfigurationsDual Channel Interleaved Mode Configuration with Two DIMMs Dual Channel Interleaved Mode ConfigurationsDual Channel Interleaved Mode Configuration with Four DIMMs Single Channel Asymmetric Mode Configuration with One Dimm Single Channel Asymmetric Mode Configurations1 USB Intel 925X ChipsetIDE Support Parallel ATE IDE InterfaceSerial ATA Interfaces Scsi Hard Drive Activity LED Connector Optional RAID Boot Configuration OverviewSerial ATA RAID Product Description For information about Refer toAuxiliary Power AUX PWR Output Connector PCI Express ConnectorsReal-Time Clock, Cmos SRAM, and Battery Serial Port 10 I/O ControllerParallel Port Keyboard and Mouse Interface Diskette Drive ControllerAudio Subsystem Audio ConnectorsAudio Subsystem Software 11.3 8-Channel 7.1 Audio Subsystem Back Panel Audio ConnectorsIs a block diagram of the 8-channel 7.1 audio subsystem 11.4 6-Channel 5.1 Audio Subsystem Channel 5.1 Audio Subsystem Block DiagramLAN Subsystem 12.2 RJ-45 LAN Connector with Integrated LEDsColor LED State Condition LAN Subsystem Software Alert Standard Format ASF SupportHardware Monitoring and Fan Control Asic Hardware Management SubsystemThermal Monitoring for D925XCV Board Thermal MonitoringThermal Monitoring for D925XBC Board Fan Monitoring Power ManagementChassis Intrusion and Detection AcpiEffects of Pressing the Power Switch System States and Power StatesPower States and Targeted System Power Wake-up Devices and Events Hardware SupportWake-up Devices and Events Fan Connectors Power ConnectorLAN Wake Capabilities Instantly Available PC Technology 14.2.8 PME# Signal Wake-up SupportResume on Ring Wake from USB14.2.10 +5 V Standby Power Indicator LED WAKE# Signal Wake-up SupportSystem Requirements Trusted Platform Module OptionalPassword Procedures Security PrecautionsHard Drive Image Backup Procedures Emergency Recovery File Back Up ProceduresClear Text Backup Optional Trusted Platform Module OwnershipAssuming Trusted Platform Module Ownership Enabling the Trusted Platform ModuleRecovering from Hard Disk Failure Recovery ProceduresRecovering from Desktop Board or TPM Failure Clearing Trusted Platform Module Ownership Software Support Page Memory Resources IntroductionAddressable Memory Detailed System Memory Address Map Memory Map DMA ChannelsSystem Memory Map DMA ChannelsO Map Fixed I/O MapAddress hex Size Description PCI Configuration Space Map PCI Configuration Space MapBus Device Function Number hex Description Interrupts InterruptsPCI Conventional Interrupt Routing Map PCI Interrupt Routing Map ICH6-R Pirq Signal Name PCI Interrupt SourceBack Panel Connectors ConnectorsBack Panel Connectors for 8-Channel 7.1 Audio Subsystem Back Panel Connectors For 8-Channel 7.1 Audio SubsystemItem/callout from Description Back Panel Connectors Shown in FigureBack Panel Connectors for 6-Channel 5.1 Audio Subsystem Back Panel Connectors For 6-Channel 5.1 Audio SubsystemBack Panel Connectors Shown in Figure D925XCV Component-side Connectors Component-side ConnectorsD925XCV Component-side Connectors Shown in Figure D925XBC Component-side Connectors D925XBC Component-side Connectors Shown in Figure Front Panel Audio Connector Atapi CD-ROM ConnectorFront Chassis Fan and Rear Chassis Fan Connectors Processor Fan Connector and Auxiliary Rear Fan ConnectorScsi Hard Drive Activity LED Connector Optional Chassis Intrusion ConnectorSerial ATA Connectors Auxiliary Power Output ConnectorPower Supply Connectors Main Power Connector Add-in Card ConnectorsATX12V Power Connector Alternate Power ConnectorFront Panel Connector Auxiliary Front Panel Power/Sleep LED ConnectorAuxiliary Front Panel Power/Sleep LED Connector Front Panel ConnectorStates for a Two-Color Power LED States for a One-Color Power LEDLED State Description Connection Diagram for Front Panel USB Connectors Front Panel USB ConnectorsConnection Diagram for Ieee 1394a Connectors Front Panel Ieee 1394a Connectors OptionalJumper Block Function/Mode Jumper Setting Configuration10.1 D925XCV Form Factor Mechanical Considerations10.2 D925XBC Form Factor Desktop Board D925XBC Dimensions10.3 I/O Shield 039 11.811 465 14.4 12.00 567 472 DC Current at Mode DC Power +3.3 +12 +5 VSB DC Loading CharacteristicsElectrical Considerations DC LoadingPower Supply Considerations Fan Connector Current CapabilityFan Connector Current Capability Fan Connector Maximum Available CurrentProcessor Heatsink for Omni-directional Airflow Thermal ConsiderationsShows the locations of the localized high temperature zones Reliability Component Maximum Case TemperatureThermal Considerations for Components Parameter Specification Temperature Desktop Board D925XCV/D925XBC Environmental SpecificationsEnvironmental ShockSafety Regulations Safety RegulationsRegulatory Compliance EMC RegulationsFCC Compliance Statement USA European Union Declaration of Conformity StatementCanadian Compliance Statement Disposal Considerations Product Ecology StatementsRecycling Considerations Product Certification Markings Product Certification Markings Board LevelDescription Marking Overview of Bios Features Resource Configuration Bios Flash Memory OrganizationPCI Autoconfiguration PCI IDE SupportOverview of Bios Features System Management Bios SmbiosLegacy USB Support Language Support Bios UpdatesCustom Splash Screen For information about Refer to Intel World Wide Web siteCD-ROM Boot Boot OptionsNetwork Boot Booting Without Attached DevicesPeripheral Selection and Configuration Fast Booting Systems with Intel Rapid Bios BootIntel Rapid Bios Boot Supervisor and User Password Functions Bios Security Features102 Bios Error Messages Bios Error MessagesError Message Explanation Removed then memory may be bad Error Messages and Beep Codes Boot Block Recovery Code CheckpointsPort 80h Post Codes Uncompressed Init Code CheckpointsRuntime Code Uncompressed in F000 Shadow RAM To prepare the descriptor tables Password checked. About to do programming before setup Bus Initialization Checkpoints Bus Initialization CheckpointsUpper Nibble High Byte Functions Checkpoint DescriptionSpeaker Bios Beep CodesLower Nibble High Byte Functions Beep Description Beep Codes112

D925XBC, D925XCV specifications

The Intel D925XBC and D925XCV are motherboards designed for Intel's LGA 775 socket, targeted primarily at the desktop market during the mid-2000s. These motherboards support Intel's innovative 800 MHz Front Side Bus and provide a robust platform for various computing applications, including gaming and multitasking.

One of the standout features of the D925XBC and D925XCV is their compatibility with Intel's Pentium 4 and Pentium D dual-core processors. These processors deliver impressive performance, especially for users engaging in demanding tasks such as video editing and 3D rendering. The support for dual-channel DDR2 memory allows for increased bandwidth and improved overall system performance, accommodating up to 8 GB of memory in total.

The motherboards are equipped with the Intel 925X chipset, which integrates advanced technologies. This chipset supports Intel's Enhanced Memory 64 Technology (EM64T), allowing for more efficient processing power and better resource management. The presence of the I/O Controller Hub (ICH6) also enhances connectivity options, including SATA 3.0 Gbps interfaces for faster data transfer rates and improved storage capabilities.

Regarding expansion and connectivity, both motherboards feature multiple PCI Express slots along with PCI slots, allowing users to customize their systems according to their needs. This expandability is essential for gamers and professionals looking to add advanced graphics cards and other peripherals. Additionally, these boards come with integrated audio, ensuring satisfactory sound quality without the need for additional sound cards.

The D925XBC and D925XCV motherboards also include integrated Ethernet controllers, supporting fast network connectivity essential for gaming and high-speed internet access. With multiple USB ports available, users can connect a wide variety of devices easily, enhancing the flexibility of their setups.

In terms of form factor, both boards follow the ATX layout, providing compatibility with a broad range of computer cases. This ensures ease of installation and upgrades while promoting good airflow and optimal thermal management for the components installed.

Overall, the Intel D925XBC and D925XCV motherboards integrate essential features and technologies that provide a solid foundation for desktop computing during their time. With strong processing capabilities, expandability, and good connectivity options, these boards were well-received by users looking for reliable performance and versatility in their systems.
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