HP dx2450 manual Installing Additional Memory, DDR2-SDRAM DIMMs

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Installing Additional Memory

The computer comes with double data rate 2 synchronous dynamic random access memory (DDR2- SDRAM) dual inline memory modules (DIMMs).

DIMMs

The memory sockets on the system board can be populated with up to four industry-standard DIMMs. These memory sockets are populated with at least one preinstalled DIMM. To achieve the maximum memory support, you can populate the system board with up to 4GB of memory configured in a high- performing dual channel mode.

DDR2-SDRAM DIMMs

For proper system operation, the DDR2-SDRAM DIMMs must be:

industry-standard 240-pin

unbuffered PC2-5300 667 MHz-compliant or PC2-6400 800 MHz-compliant

1.8 volt DDR2-SDRAM DIMMs

The DDR2-SDRAM DIMMs must also:

support CAS latency 5 DDR2 667 Mhz (5-5-5 timing), CAS latency 5 DDR2 800 Mhz (5-5-5 timing), and CAS latency 6 DDR2 800 Mhz (6-6-6 timing)

contain the mandatory JEDEC SPD information

In addition, the computer supports:

512Mbit and 1Gbit non-ECC memory technologies

single-sided and double-sided DIMMs

DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM are not supported

NOTE: The system will not operate properly if you install unsupported DIMMs.

14 Chapter 2 Hardware Upgrades

ENWW

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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 Product Features Standard Configuration FeaturesFront Panel Components 1Front Panel ComponentsMedia Card Reader Components 2Media Card Reader ComponentsRear Panel Components 3Rear Panel ComponentsKeyboard 4Keyboard ComponentsUsing the Windows Logo Key 5Windows Logo Key FunctionsSerial Number Location 6Serial Number and Product ID LocationHardware Upgrades Removing the Computer Access Panel 1Removing the Computer Access PanelReplacing the Computer Access Panel 2Replacing the Computer Access Panel Hardware UpgradesRemoving the Front Bezel 3Removing the Front BezelRemoving Bezel Blanks Replacing the Front Bezel 5Replacing the Front BezelDDR2-SDRAM DIMMs Installing Additional MemoryDIMMs Populating Dimm Sockets Description Socket ColorInstalling DIMMs Enww Removing or Installing an Expansion Card 1Expansion Slot LocationsRemoving or Installing an Expansion Card 11Removing a Standard PCI Expansion Card Hardware Upgrades Enww Enww Drive Positions 15Drive PositionsInstalling Additional Drives 16Extra Drive Retainer Screws Location Hardware UpgradesInstalling Additional Drives System Board Drive Connections 2System Board Drive ConnectionsRemoving an Optical Drive 19Removing the Optical Drive Hardware Upgrades Installing an Optical Drive into the 5.25-inch Drive Bay 20Installing the Optical DriveRemoving an External 3.5-inch Drive Enww Installing a Drive into the 3.5-inch External Drive Bay 24Removing a 3.5-inch Device Media Card Reader ShownEnww Removing an Internal 3.5-inch Hard Drive Enww 30Removing the Hard Drive Hardware Upgrades Installing an Internal 3.5-inch Hard Drive 31Installing the Hard Drive in the Drive Cage33Installing the Hard Drive Cage Hardware Upgrades Enww Specifications Table A-1SpecificationsRated Input Current maximum Battery Replacement Type Enww Cable Lock Installing a Security LockExternal Security Devices Padlock HP Business PC Security LockEnww Enww Grounding Methods Electrostatic DischargePreventing Electrostatic Damage Computer Operating Guidelines and Routine Care Optical Drive Precautions CleaningSafety Shipping PreparationIndex Enww