Lenovo 8453, 8455, 8454, 8459, 8460, 8457, 8458, 8456 manual Installing memory

Page 33

Installing memory

Your computer has either two or four connectors for installing dual inline memory modules (DIMMs). Some computers have two memory connectors that provide up to a maximum of 2.0 GB of system memory. Some computers have four memory connectors that provide up to a maximum of 4.0 GB of system memory.

vIf your computer has just two memory connectors, your system board has DDR type memory. DDR memory modules are 184-pin, 2.5 V and can be used in any combination of 256 MB, 512 MB, and 1 GB sizes.

vIf your computer has four memory connectors, your system board has DDR2 type memory. DDR2 memory modules are 240-pin, 1.8 V and can be used in any combination of 256 MB, 512 MB, and 1 GB sizes.

To install a memory module:

1.Remove the computer cover. See “Removing the cover” on page 10.

2.Access the system board. See “Accessing system board components” on page 12.

3.Remove any parts that might prevent access to the memory connectors.

4.Locate the memory connectors. See “Identifying parts on the system board” on page 13.

5.Open the retaining clips.

6.Position the memory module over the memory connector. Make sure that the notch 1 on the memory module aligns correctly with the connector key2 on the system board. Push the memory module straight down into the connector until the retaining clips close.

Chapter 1. Installing options 17

Image 33

Contents User Guide Lenovo 3000 J Series Page Lenovo 3000 J Series Page Contents Iv User Guide Conditions that require immediate action Important safety informationService General safety guidelinesPower cords and power adapters Extension cords and related devices Plugs and outletsBatteries Heat and product ventilation CD and DVD drive safetyAdditional safety information Lithium battery noticeTo connect To disconnect Laser compliance statement Modem safety informationPower supply statement Information resources OverviewXiv User Guide Features Installing optionsConnectivity Operating systems, preinstalled varies by model Available options Dimensions SpecificationsWeight EnvironmentSupported operating positions Tools requiredHandling static-sensitive devices Installing external options Locating connectors on the rear of your computer Obtaining device drivers Connector DescriptionRemoving the cover Locating components Accessing system board components Identifying parts on the system board User Guide Microprocessor and heat sink 10 Sata IDE connectors Fan connector 11 Clear CMOS/Recovery jumper Installing memory What to do next Installing PCI adaptersSecurity features Password protection Changing the batteryPadlock Erasing a lost or forgotten password clearing Cmos Replacing the cover and connecting the cables Starting the Setup Utility program Using the Setup UtilityViewing and changing settings Using passwordsAdministrator or Supervisor Password Selecting a startup device Exiting from the Setup Utility programSelecting a temporary startup device Changing the startup device sequenceUser Guide Updating flashing Bios from a diskette Appendix A. Updating system programsSystem program User Guide Appendix B. Cleaning the mouse Cleaning an optical mouseCleaning a mouse with a ball User Guide Basic AT commands Appendix C. Manual modem commandsSet Pulse dial as default Low speaker volumeSet Tone Dial as default Internal speaker on until carrier detectedExtended AT commands MNP/V.42/V.42bis/V.44 commands Fax Class 2 commands Fax Class 1 commandsVoice commands Appendix C. Manual modem commands User Guide Appendix D. Notices Trademarks Television output noticeIndex Page Page Part Number 41T3715