Intel D925XBC, D925XCV specifications Memory Configurations, Memory Channel and Dimm Configuration

Page 21

Product Description

1.6.1Memory Configurations

The Intel 82925X MCH supports two types of memory organization:

Dual channel (Interleaved) mode. This mode offers the highest throughput for real world applications. Dual channel mode is enabled when the installed memory capacities of both DIMM channels are equal. Technology and device width can vary from one channel to the other but the installed memory capacity for each channel must be equal. If different speed DIMMs are used between channels, the slowest memory timing will be used.

Single channel (Asymmetric) mode. This mode is equivalent to single channel bandwidth operation for real world applications. This mode is used when only a single DIMM is installed or the memory capacities are unequal. Technology and device width can vary from one channel to the other. If different speed DIMMs are used between channels, the slowest memory timing will be used.

Figure 4 illustrates the memory channel and DIMM configuration.

NOTE

The DIMM0 sockets of both channels are blue. The DIMM1 sockets of both channels are black.

Channel A, DIMM 0

Channel A, DIMM 1

Channel B, DIMM 0

Channel B, DIMM 1

OM16677

Figure 4. Memory Channel and DIMM Configuration

21

Image 21
Contents D925XCV/D925XBC Revision Revision History Date Revision HistoryPreface Other Common Notation Contents Technical Reference Contents Overview of Bios FeaturesFigures Chassis Intrusion Connector Page PCI Bus Terminology Change Board DifferencesSummary 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 toPCI Express Connectors Auxiliary Power AUX PWR Output ConnectorReal-Time Clock, Cmos SRAM, and Battery 10 I/O Controller Serial PortParallel Port Keyboard and Mouse Interface Diskette Drive ControllerAudio Connectors Audio SubsystemAudio 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 Diagram12.2 RJ-45 LAN Connector with Integrated LEDs LAN SubsystemColor 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 Hardware Support Wake-up Devices and EventsWake-up Devices and Events Power Connector Fan ConnectorsLAN 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 ModuleRecovery Procedures Recovering from Hard Disk FailureRecovering from Desktop Board or TPM Failure Clearing Trusted Platform Module Ownership Software Support Page Introduction Memory ResourcesAddressable Memory Detailed System Memory Address Map Memory Map DMA ChannelsSystem Memory Map DMA ChannelsFixed I/O Map 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 One-Color Power LED States for a Two-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 Component Maximum Case Temperature ReliabilityThermal Considerations for Components Parameter Specification Temperature Desktop Board D925XCV/D925XBC Environmental SpecificationsEnvironmental ShockSafety Regulations Safety RegulationsRegulatory Compliance EMC RegulationsEuropean Union Declaration of Conformity Statement FCC Compliance Statement USACanadian Compliance Statement Product Ecology Statements Disposal ConsiderationsRecycling Considerations Product Certification Markings Board Level Product Certification MarkingsDescription Marking Overview of Bios Features Resource Configuration Bios Flash Memory OrganizationPCI Autoconfiguration PCI IDE SupportSystem Management Bios Smbios Overview of Bios FeaturesLegacy 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 DevicesFast Booting Systems with Intel Rapid Bios Boot Peripheral Selection and ConfigurationIntel 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 DescriptionBios Beep Codes SpeakerLower Nibble High Byte Functions Beep Description Beep Codes112