SUPER MICRO Computer AS1020S-8 user manual Optimizing memory performance

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AS1020S-8 User's Manual

Optimizing memory performance

If two processors are installed, it is better to stagger pairs of DIMMs across both sets of CPU DIMM slots, e.g. fi rst populate CPU1 slots 1A and 1B, then CPU2 slots 1A, and 1B, then the next two CPU1 slots, etc. This balances the load over both CPUs to optimize performance.

Maximum memory (two CPUs): 32 GB for DDR333/266 and 16 GB for DDR400. If only one CPU is installed, maximum supported memory is halved (16 GB for DDR333/266 and 8 GB for DDR400).

Figure 5-4. Side and Top Views of DDR Installation

To Install:

Insert module vertically and press down until it snaps into place. The release tabs should close - if they do not you should close them yourself.

To Remove:

Use your thumbs to gently push each re- lease tab outward to release the DIMM from the slot.

Note the notch in the slot and on the bottom of the DIMM. These prevent the DIMM from being installed incorrectly.

Populating Memory Banks for 64-bit Operation

CPU1

DIMM1A

X

X

X

X

CPU1

DIMM1B

CPU1

DIMM2A

X

X

X

X

CPU1

DIMM2B

CPU2

DIMM1A

X

X

CPU2

DIMM1B

CPU2

DIMM2A

X

X

CPU2

DIMM2B

5-8

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Contents AS1020S-8 Manual Revision Release Date December 28 Preface About This ManualManual Organization Advanced Chassis Setup System SafetyAdvanced Serverboard Setup BiosPreface Table of Contents Advanced Serverboard Setup HDD LED NIC1 LED NIC2 LEDAdvanced Chassis Setup JsledBios AppendicesPage Chapter Introduction OverviewServerboard Features Server Chassis Features Cooling System Serverworks HT-2000/1000 Chipset System Block Diagram Page Chapter Server Installation Preparing for SetupUnpacking the System Choosing a Setup Location Rack PrecautionsServer Precautions Rack Mounting Considerations Installing the System into a Rack Installing the Rack RailsIdentifying the Sections of the Rails Installing the Chassis Rails Identifying the Sections of the RailsInstalling the Server into the Rack Installing the Server into a RackInstalling the Server into a Telco Rack Installing the Server into a Telco RackChecking the Serverboard Setup CD-ROM and floppy disk drives Checking the Drive Bay SetupAccessing the drive bays Check the Scsi disk drivesSupplying power to the system Check the airflowChapter System Interface Control Panel ButtonsControl Panel LEDs Scsi Drive Carrier LEDs Page Chapter System Safety Electrical Safety PrecautionsGeneral Safety Precautions ESD Precautions Operating Precautions Installing the Onboard BatteryHandling the Serverboard Chapter Advanced Serverboard SetupPrecautions UnpackingProcessor and Heatsink Installation Installing the Processor install to the CPU#1 socket firstMounting the Serverboard into a Chassis Page Installing the Heatsinks Installing HeatsinksConnecting Cables Connecting Data CablesConnecting Power Cables Connecting the Control Panel I/O PortsInstalling Memory SupportSide and Top Views of DDR Installation Optimizing memory performancePCI card installation Adding PCI CardsPCI slots Serverboard Details H8DSR-8 Serverboard Layout Not drawn to scaleH8DSR-8 Quick Reference Jumpers Description Default SettingConnectors Description Onboard LEDs DescriptionProcessor Power Connector Connector DefinitionsPrimary ATX Power Connector Secondary Power ConnectionPower LED Overheat/Fan Fail LEDPower Button Power Fail LEDReset Button USB0/1 Universal Serial Bus PortsFan Headers USB2/3 HeadersSerial Ports ATX PS/2 Keyboard and PS/2 Mouse PortsJLAN1/2 Ethernet Ports Power LED/SpeakerSMB Power I2C Ipmb HeaderWake-On-LAN Overheat LEDWake-On-Ring Chassis IntrusionJumper Settings Explanation JumpersCmos Clear Onboard Speaker Enable/ Disable PCI-X Slot Frequency SelectWatch Dog VGA Enable/Disable Scsi Controller Enable/ DisableScsi Termination Enable/ Disable Power Force On+3.3V Power LED Onboard IndicatorsI2C to PCI Enable/Disable JLAN1/JLAN2 LEDsScsi Activity LEDs Post Code LEDsFloppy Connector Floppy, IDE and Scsi Drive ConnectionsIDE Connector Scsi Connectors Diffsens TermpwrPage Chapter Advanced Chassis Setup Static-Sensitive DevicesTools Required Control Panel Chassis Front and Rear ViewsSystem Fan Failure Installing a new fanSystem Fans Replacing System FansDrive Bay Installation/Removal Accessing the Drive BaysScsi Drive Installation Mounting a Scsi drive in a drive carrierInstalling/removing hot-swap Scsi drives CD-ROM and Floppy Drive Installation Removing/Replacing the Power Supply Power SupplyPower Supply Failure Removing the power supplyRemoving/Replacing the Power Supply Page Starting the Setup Utility ChapterIntroduction Advanced Settings Menu Main MenuCPU Configuration Sub-Menu IDE Configuration Bit Data Transfer DMA ModeA.R.T Hard Disk Write ProtectPCI/PnP Menu Floppy ConfigurationSuper IO Configuration Chipset Menu North Bridge ConfigurationEnable Clock to All DIMMs MCT Timing ModeUser Configuration Mode ECC Configuration Dram ECC EnableDram Scrub Redirect Power Down ControlECC Chip Kill Dram BG ScrubATA Configuration Acpi Configuration Advanced Acpi ConfigurationEvent Log Configuration Hyper Transport Configuration MPS Configuration AMD PowerNow ConfigurationRemote Access Configuration PCI Express ConfigurationSystem Fan Monitor CPU Overheat TemperatureSystem Health Monitor Fan Speed Control ModesBoot Menu Boot Settings ConfigurationRemovable Drives Boot Device PriorityHard Disk Drives CD/DVD DrivesSecurity Menu Exit MenuLoad Optimal Defaults Load Fail-Safe DefaultsPage Appendix a Bios Error Beep Codes Amibios Error Beep CodesBeep Code Error Message Description Page Appendix B Bios Post Checkpoint Codes Uncompressed Initialization CodesBootblock Recovery Codes Uncompressed Initialization Codes Checkpoint Appendix B Bios Post Checkpoint Codes Checkpoint A9h Aah Abh B0h B1h 00h Page Appendix C System Specifications Serverboard WeightPower Supply ChassisRegulatory Compliance