SUPER MICRO Computer X7DBU, X7DGU Thermal Management 2 Available if supported by the CPU

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Chapter 4: BIOS

Thermal Management 2 (Available if supported by the CPU.)

Set to Enabled to use Thermal Management 2 (TM2) which will lower CPU voltage and frequency when the CPU temperature reaches a predefined overheat threshold. Set to Disabled to use Thermal Manager 1 (TM1), allowing CPU clocking to be regulated via CPU Internal Clock modulation when the CPU temperature reaches the overheat threshold. The options are Disabled and Enabled.

C1 Enhanced Mode (Available when supported by the CPU.)

Set to Enabled to enable Enhanced Halt State to lower CPU voltage/frequency to prevent overheat. The options are Enabled and Disabled. (Note: please refer to Intel’s web site for detailed information.)

Execute Disable Bit (Available when supported by the CPU.)

Set to Enabled to allow the processor to classify areas in memory where an application code can execute and where it cannot, and thus preventing a worm or a virus from inserting and creating a flood of codes to overwhelm the processor or damage the system during an attack. (Note: this feature is available when your OS and your CPU support the function of Execute Disable Bit.) The options are Disabled and Enabled. (Note: For more information regarding hardware/software support for this function, please refer to Intel's and Microsoft's web sites.)

Adjacent Cache Line Prefetch (Available when supported by the CPU.)

The CPU fetches the cache line for 64 bytes if this option is set to Disabled. The CPU fetches both cache lines for 128 bytes as comprised if Enabled. The default settings are Disabled for the Intel 5100 Series Processors and Enable for the 5000 Series Processors.

Hardware Prefetcher (Available when supported by the CPU.)

Set to Enabled to activate the hardware components that are used in conjunction with software programs to prefetch data in order to shorten execution cycles and maximize data processing efficiency. The options are Disabled and Enabled.

Direct Cache Access (Available when supported by the CPU.)

Set to Enable to route inbound network IO traffic directly into processor caches to reduce memory latency and improve network performance. The options are Enabled and Disabled. If this item is set to Enabled, the following item will display.

DCA Delay Clocks (Available if supported by the CPU.)

This feature allows the user to set the clock delay setting from snoop to prefetch for Direct Cache Access. Select a setting from 8 (bus cycles) to 120 (bus cycles) (in 8-cycle increment). The default setting is 32 (bus cycles).

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Contents Super Reproductive harm About This Manual Manual OrganizationConventions Used in the Manual Table of Contents Troubleshooting Appendices BiosOverview ChecklistHeadquarters Contacting SupermicroEurope Asia-PacificX7DBU/X7DGU Image Not drawn to scale X7DBU/X7DGU Motherboard LayoutLE Indicators Description Description Default SettingQuick Reference X7DBU/X7DGU JumperMemory Motherboard FeaturesChipset Expansion SlotsDimensions Acpi FeaturesOnboard I/O OtherESB2 System Block Diagram for the X7DBUXeon Quad-core/Dual-core Processor Features Chipset OverviewXeon Quad-core/Dual-core Processor Recovery from AC Power Loss Special FeaturesEnvironmental Temperature Control PC Health MonitoringSlow Blinking LED for Suspend-State Indicator Acpi FeaturesMain Switch Override Mechanism System Resource AlertPower Supply External Modem Ring-OnWake-On-LAN WOL Super I/O Page Precautions Static-Sensitive DevicesUnpacking Installation of the LGA771 Processor Processor and Heatsink InstallationPage Installation of the Heatsink To Un-install the HeatsinkCEK Heatsink Installation Mounting the Motherboard in the Chassis Dimm Installation Installing DIMMsMemory Support Memory performancePossible System Memory Allocation & Availability Installing and Removing DIMMsControl Panel Connectors/IO Ports Back Panel Connectors/IO PortsBack Panel Connectors JF1 Header Pins FP Reset ButtoFront Control Panel Power LED Pin Definitions JF1 Power LEDFront Control Panel Pin Definitions NMI Button NMI Button Pin Definitions JF1NIC1/NIC2 LED Indicators HDD LED/FP UID SwitchOverheat OH/Fan Fail/PWR Fail/FP UID LED Power Fail LEDOH/Fan Fail/PWR Fail/FP UID LED Pin Definitions JF1 OH/Fan Fail/PWR Fail/FP UID Indica Tor StatusPower Button Reset ButtonReset Button Pin Definitions JF1 Power Button Pin Definitions JF1ATX Power Connector Connecting CablesProcessor Power Connector ATX Power 20-pin Connector Pin DefinitionsChassis Intrusion Universal Serial Bus USBKeylock Fan HeadersPin Fan Header Pin Definitions Keylock Pin DefinitionsSerial Ports ATX PS/2 Keyboard and PS/2 Mouse PortsPS/2 Keyboard Mouse Port Pin Definitions Serial Port Pin DefinitionsWake-On-Ring Wake-On-LANWake-On-LAN Pin Definitions Power LED/Speaker Speaker Connector Pin DefinitionsGlan 1/2 Giga-bit Ethernet Ports Overheat LED Pin Definitions Overheat LED/Fan Fail JOH1OH/Fan Fail LED Pin Definitions SMB Header Pin DefinitionsVGA Connector Power SMB I2 C ConnectorSgpio Headers Unit Identification SwitchesGlan Enable/Disable Jumper SettingsGlan Enable Jumper Settings Explanation JumpersWatch Dog Enable/Disable Watch Dog Jumper Settings JWDCmos Clear VGA Enable/Disable Jumper Settings JPG1 VGA Enable/DisableI2C Bus to PCI Slots 1/2 I2C Bus to PCI Slots Jumper SettingsOnboard Indicators Glan Activity Indicator Jumper SettingsGlan LEDs Onboard PWR LED Indicator LE1 Onboard Power LED LE1Step Floppy ConnectorSimso Ipmi Slot Bale IDE ConnectorSXB1/SXB2 Slots Before Power On Troubleshooting ProceduresNo Power Losing the System’s Setup ConfigurationMemory Errors Technical Support ProceduresQuestion How do I update my BIOS? Frequently Asked QuestionsQuestion Whats on the CD that came with my motherboard? Returning Merchandise for ServiceHow To Change the Configuration Data System BiosStarting the Setup Utility IntroductionRunning Setup Main Bios SetupPress the Delete key to enter Setup Main Setup Features Main Bios Setup MenuTransfer Mode LBA Mode ControlUltra DMA Mode Sata Controller ModeSata Ahci Available when Sata RAID is Disabled ICH RAID Code Base Available when Sata RAID is EnabledSystem Memory Extended MemoryAdvanced Setup Memory Cache Cache System Bios Area Power Loss ControlCache Video Bios Area Resume On Modem RingCache Extended Memory Cache Base 512K-640KDiscrete Mtrr Allocation PCI ConfigurationEmulated IRQ Solutions Default Primary Video AdapterPCI Parity Error Forwarding PCI Fast Delayed TransactionLatency Timer Enable MasterLarge Disk Access Mode Serr Signal ConditionHigh Temperature Dram Operation Memory Branch ModeCrystal Beach Features Branch 0/1 Rank Interleaving & SparingFrequency Ratio Available when supported by the CPU Clock Spectrum FeatureCore-Multi-Processing Available when supported by the CPU Machine Checking Available when supported by the CPUExecute Disable Bit Available when supported by the CPU C1 Enhanced Mode Available when supported by the CPUHardware Prefetcher Available when supported by the CPU Direct Cache Access Available when supported by the CPUI/O Device Configuration Intel Eist Support Available when supported by the CPUKBC Clock Input Serial Port aDMI Event Logging Floppy Disk ControllerEvent Log Validity Event Log CapacityCOM Port Address Console RedirectionBaud Rate Console TypeOverheat Alarm Peci Agent 1/2 Temperatures/System TemperatureHardware Monitor Fan1-Fan8 Speeds System TemperatureFan Speed Control Modes Voltage MonitoringBios Post Watch Dog Bios Post ErrorsSystem Event Logging Clear System Event LoggingTimer for Loading OS Minutes OS Boot Watch DogSystem Event Log/System Event Log List Mode Time Out OptionIPMI LAN Configuration Realtime Sensor DataUpdate LAN Settings Default GatewayVlan Tagging IP Address SourceSecurity Boot Priority Order/Excluded from Boot Orders BootExit Page Recoverable Post Error Beep Codes Appendix a Post Error Beep CodesPage Appendix B Installing the Windows OS Page Driver/Tool Installation Display Screen Installing other Software Programs and DriversConfiguring Supero Doctor Supero Doctor III Interface Display Screen-II Remote Control