HP dx2450 manual Populating Dimm Sockets, Description Socket Color

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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 XMM3 operate in memory channel A. Sockets XMM2 and XMM4 operate in memory channel B.

Figure 2-6DIMM Socket Locations

Item

Description

Socket Color

 

 

 

1

DIMM socket XMM1, Channel A

Black

 

(populate first)

 

 

 

 

2

DIMM socket XMM2, Channel B

Black

 

(populate second)

 

 

 

 

3

DIMM socket XMM3, Channel A

Blue

 

 

 

4

DIMM socket XMM4, Channel B

Blue

 

 

 

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

The system will operate in a higher-performing dual channel mode if like-sized DIMMs of equal capacity are populated in one or both pairs of sockets. For example, if the Channel A XMM1 socket and Channel B XMM2 socket (the two black sockets) both have 1024MB DIMMs installed, the system will operate in dual channel mode. If this system had two additional DIMMs added into the blue sockets, they could be a pair of 512MB or 1024MB DIMMs and the system would still operate in dual channel mode. For purposes of “like sizes,” a single-sided 512MB DIMM and a double-sided 512MB DIMM would not be the same size because they have different numbers of memory chips on them.

The system will operate in single channel mode if the DIMMs are populated in any other supported configuration. Supported configurations consist of any combination of one, two, three, or four DIMMs as long as socket XMM1 is populated before socket XMM3 in Channel A, and socket XMM2 is populated before socket XMM4 in Channel B.

ENWW

Installing Additional Memory 15

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Contents Hardware Reference Guide dx2450 Microtower Model 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 Components4Keyboard Components Keyboard5Windows Logo Key Functions Using the Windows Logo Key6Serial Number and Product ID Location Serial Number LocationHardware Upgrades 1Removing the Computer Access Panel Removing the Computer Access Panel2Replacing the Computer Access Panel Hardware Upgrades Replacing the Computer Access Panel3Removing the Front Bezel Removing the Front BezelRemoving Bezel Blanks 5Replacing the Front Bezel Replacing the Front BezelInstalling Additional Memory DIMMsDDR2-SDRAM DIMMs Description Socket Color Populating Dimm SocketsInstalling DIMMs Enww 1Expansion Slot Locations Removing or Installing an Expansion CardRemoving or Installing an Expansion Card 11Removing a Standard PCI Expansion Card Hardware Upgrades Enww Enww 15Drive Positions Drive Positions16Extra Drive Retainer Screws Location Hardware Upgrades Installing Additional DrivesInstalling Additional Drives 2System Board Drive Connections System Board Drive ConnectionsRemoving an Optical Drive 19Removing the Optical Drive Hardware Upgrades 20Installing the Optical Drive Installing an Optical Drive into the 5.25-inch Drive BayRemoving an External 3.5-inch Drive Enww 24Removing a 3.5-inch Device Media Card Reader Shown Installing a Drive into the 3.5-inch External Drive BayEnww Removing an Internal 3.5-inch Hard Drive Enww 30Removing the Hard Drive Hardware Upgrades 31Installing the Hard Drive in the Drive Cage Installing an Internal 3.5-inch Hard Drive33Installing the Hard Drive Cage Hardware Upgrades Enww Table A-1Specifications SpecificationsRated Input Current maximum Battery Replacement Type Enww Installing a Security Lock External Security DevicesCable Lock HP Business PC Security Lock PadlockEnww Enww Electrostatic Discharge Preventing Electrostatic DamageGrounding Methods Computer Operating Guidelines and Routine Care Cleaning Optical Drive PrecautionsSafety Shipping PreparationIndex Enww