HP VS803UT manual Installing DIMMs

Page 25

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 will have more memory than the other, the larger amount should be assigned to Channel A. For example, if you are populating the sockets with one 2-GB DIMM, and three 1-GB DIMMs, Channel A should be populated with the 2-GB DIMM and one 1-GB DIMM, and Channel B should be populated with the other two 1-GB DIMMs. With this configuration, 4-GB will run as dual channel and 1-GB will run as single channel.

●In any mode, the maximum operational speed is determined by the slowest DIMM in the system.

Installing DIMMs

CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the power to drain before adding or removing memory modules. Regardless of the power-on state, voltage is always supplied to the memory modules as long as the computer is plugged into an active AC outlet. Adding or removing memory modules while voltage is present may cause irreparable damage to the memory modules or system board. If you see an LED light on the system board, voltage is still present.

The memory module sockets have gold-plated metal contacts. When upgrading the memory, it is important to use memory modules with gold-plated metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other.

Static electricity can damage the electronic components of the computer or optional cards. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. For more information, refer to Appendix D, Electrostatic Discharge

on page 57.

When handling a memory module, be careful not to touch any of the contacts. Doing so may damage the module.

1.Remove/disengage any security devices that prohibit opening the computer.

2.Remove all removable media, such as compact discs or USB flash drives, from the computer.

3.Turn off the computer properly through the operating system, then turn off any external devices.

4.Disconnect the power cord from the power outlet and disconnect any external devices.

CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the power to drain before adding or removing memory modules. Regardless of the power-on state, voltage is always supplied to the memory modules as long as the computer is plugged into an active AC outlet. Adding or removing memory modules while voltage is present may cause irreparable damage to the memory modules or system board. If you see an LED light on the system board, voltage is still present.

5.If the computer is on a stand, remove the computer from the stand.

6.Remove the access panel.

WARNING! To reduce risk of personal injury from hot surfaces, allow the internal system components to cool before touching.

ENWW

Installing Additional Memory 19

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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 ComponentsKeyboard Using the Windows Logo Key4Keyboard Components 5Windows Logo Key FunctionsArrow 6Serial Number and Product ID Location Serial Number LocationServiceability Features Hardware UpgradesSmart Cover FailSafe Key Unlocking the Smart Cover Lock1Removing the Smart Cover Lock Screw Removing the Computer Access Panel 3Replacing the Access Panel Hardware Upgrades Replacing the Computer Access PanelRemoving the Front Bezel Removing Bezel Blanks 5Removing a Bezel Blank Hardware Upgrades6Replacing the Front Bezel Replacing the Front BezelUsing the Small Form Factor Computer in a Tower Orientation DIMMs Installing Additional MemoryDDR3-SDRAM DIMMs 1DIMM Socket Locations Populating Dimm SocketsInstalling DIMMs 9Rotating the Drive Cage Up Hardware Upgrades Enww 2Expansion Slot Locations Removing or Installing an Expansion Card12Opening the Expansion Slot Retainer 13Removing an Expansion Slot Cover Hardware Upgrades 14Removing a Standard PCI Expansion Card Enww Enww 3Drive Positions Drive Positions19Extra Guide Screw Locations Installing and Removing Drives4System Board Drive Connections System Board Drive ConnectionsRemoving an External 5.25-inch Drive Enww 24Removing the 5.25-inch Drive Installing an Optical Drive into the 5.25-inch Drive Bay26Installing the Optical Drive Hardware Upgrades Enww Removing an External 3.5-inch Drive 30Disconnecting the Media Card Reader USB Cable Installing a Drive into the 3.5-inch External Drive Bay Enww Enww 38Installing Hard Drive Guide Screws Removing and Replacing a Removable 3.5-inch Sata Hard Drive 41Removing the Thermal Sensor Enww Enww Enww Table A-1Specifications SpecificationsAppendix a Specifications Battery Replacement Type Enww External Security Devices Installing a Security LockHP/Kensington MicroSaver Security Cable Lock HP Business PC Security Lock PadlockEnww Figure C-6Engaging the Lock Front Bezel SecurityEnww Preventing Electrostatic Damage Electrostatic DischargeGrounding Methods Computer Operating Guidelines and Routine Care Cleaning Optical Drive PrecautionsSafety Shipping PreparationComputer IndexEnww
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