Hitachi 8000 Elite manual Populating Dimm Sockets, 1DIMM Socket Locations

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Populating DIMM Sockets

There are four DIMM sockets on the system board, with two sockets per channel. The sockets are labeled XMM1, XMM2, XMM3, and XMM4. Sockets XMM1 and XMM2 operate in memory channel A. Sockets XMM3 and XMM4 operate in memory channel B.

Figure 2-7DIMM Socket Locations

Table 2-1DIMM Socket Locations

Item

Description

Socket Color

 

 

 

1

XMM1 socket, Channel A (populate first)

Black

 

 

 

2

XMM2 socket, Channel A (populate third)

White

 

 

 

3

XMM3 socket, Channel B (populate second)

White

 

 

 

4

XMM4 socket, Channel B (populate fourth)

White

NOTE: A DIMM must occupy the black XMM1 socket. Otherwise, the system will display a POST error message indicating that a memory module must be installed in the wrong socket.

The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending on how the DIMMs are installed.

The system will operate in single channel mode if the DIMM sockets are populated in one channel only.

The system will operate in a higher-performing dual channel mode if the total memory capacity of the DIMMs in Channel A is equal to the total memory capacity of the DIMMs in Channel B. The technology and device width can vary between the channels. For example, if Channel A is populated with two 1-GB DIMMs and Channel B is populated with one 2-GB DIMM, the system will operate in dual channel mode.

The system will operate in flex mode if the total memory capacity of the DIMMs in Channel A is not equal to the total memory capacity of the DIMMs in Channel B. In flex mode, the channel populated with the least amount of memory describes the total amount of memory assigned to dual channel and the remainder is assigned to single channel. For optimal speed, the channels should be balanced so that the largest amount of memory is spread between the two channels. If one channel

ENWW

Installing Additional Memory 17

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Contents Hardware Reference Guide Hardware Reference Guide About This Book Iv About This Book Table of contents Appendix D Electrostatic Discharge Standard Configuration Features Product Features1Front Panel Components Front Panel Components2Media Card Reader Components Media Card Reader Components3Rear Panel Components Rear Panel Components5Windows Logo Key Functions Using the Windows Logo KeyKeyboard 4Keyboard ComponentsArrow 6Serial Number and Product ID Location Serial Number LocationServiceability Features Hardware UpgradesSmart Cover FailSafe Key Unlocking the Smart Cover Lock1Removing the Smart Cover Lock Screws Removing the Computer Access Panel 3Replacing the Computer Access Panel Hardware Upgrades Replacing the Computer Access PanelRemoving the Front Bezel Removing Bezel Blanks 6Replacing the Front Bezel Replacing the Front BezelDDR3-SDRAM DIMMs Installing Additional MemoryDIMMs 1DIMM Socket Locations Populating Dimm SocketsInstalling DIMMs Enww 2Expansion Slot Locations Removing or Installing an Expansion Card11Removing an Expansion Slot Cover Enww Enww 3Drive Positions Drive PositionsRemoving a Drive from a Drive Bay 16Disconnecting the Optical Drive Cables17Disconnecting the Media Card Reader USB Cable Enww Enww Guide Screw Device Installing Additional Drives4System Board Drive Connections System Board Drive ConnectionsInstalling a 5.25-inch Drive into an External Drive Bay Enww 27Installing a Hard Drive into the Hard Drive Bay Removing and Replacing a Removable 3.5-inch Sata Hard Drive 30Removing the Thermal Sensor Enww Enww Enww Changing from a Minitower to a Desktop Configuration Enww Changing from a Desktop to a Minitower Configuration Enww Enww Table A-1Specifications SpecificationsPower Output Battery Replacement Type Enww HP/Kensington MicroSaver Security Cable Lock Installing a Security LockExternal Security Devices HP Business PC Security Lock PadlockEnww Figure C-6Engaging the Lock Front Bezel SecurityEnww Grounding Methods Electrostatic DischargePreventing Electrostatic Damage Computer Operating Guidelines and Routine Care Shipping Preparation Optical Drive PrecautionsCleaning SafetyIndex Enww