Lenovo 8420, 8426, 8421, 8145, 8142, 8141, 8095, 8096 manual Installing memory

Page 28

The following illustration shows the locations of parts on the system board.

1	12v power connector	13	SATA 2 connector
2	Diskette drive connector	14	SATA 1 connector
3	Speaker connector	15 Cover presence switch connector
4	Memory connector 4	16	Power supply connector
5	Memory connector 3	17 PCI Express (x16) graphics adapter
			connector
6	Memory connector 2	18 PCI Express (x1) adapter connector
7	Memory connector 1	19 PCI adapter connector 2
8	Clear CMOS/Recovery jumper	20 PCI adapter connector 1
9	Front panel connector	21	Battery
10	PATA IDE connector	22	Microprocessor
11	SATA 4 connector	23	Microprocessor fan connector
12	SATA 3 connector	24	Microprocessor heat sink

Installing memory

Your computer has four connectors for installing dual inline memory modules (DIMMs) that provide up to a maximum of 4.0 GB of system memory.

Note: Addressable memory might be less than total supported memory.

System memory is divided into two channels (channel A and B). Memory connectors 1 and 2 are channel A, and memory connectors 3 and 4 are channel B. If memory modules are present in both channels, your computer operates in dual channel mode.

Your computer has either double data rate (DDR) or double data rate 2 (DDR2) memory. The type of memory required depends on the system board that is installed in your computer.

12User Guide

Image 28

Contents User Guide Types 8095, 8096, 8141 Types 8145, 8420, 8421 Page User Guide Types 8095, 8096, 8141 Types 8145, 8420, 8421 Page Contents Iv User Guide Important safety information Conditions that require immediate actionGeneral safety guidelines ServicePower cords and power adapters Extension cords and related devicesPlugs and outlets BatteriesCD and DVD drive safety Heat and product ventilationLithium battery notice Additional safety informationTo connect To disconnect Modem safety information Laser compliance statementPower supply statement Overview Information resourcesXiv User Guide Installing options FeaturesMemory Operating systems, preinstalled varies by model type Specifications Tools required Available optionsHandling static-sensitive devices Installing external options Locating the connectors on the front of your computer Locating the connectors on the rear of your computer Connector Description Obtaining device driversRemoving the cover Locating components Identifying parts on the system boardInstalling memory Installing options Installing adapters What to do nextWhat to do next Installing internal drives Drive specificationsInstalling a drive User Guide Connecting the first optical drive Installing security features Connecting a serial ATA hard disk driveChanging the battery Password protectionPadlock loop User Guide Erasing a lost or forgotten password clearing Cmos Replacing the cover and connecting the cablesUser Guide Using the Setup Utility program Starting the Setup Utility programViewing and changing settings Using passwordsUser password Administrator passwordIDE Drive User Password IDE Drive Master PasswordUsing Security Profile by Device Setting, changing, and deleting a passwordSelecting a startup device Selecting a temporary startup device Exiting from the Setup Utility programChanging the startup sequence Updating flashing Bios from a diskette Updating flashing Bios from your operating systemAppendix A. Updating system programs System programsRecovering from a POST/BIOS update failure Click Continue Click Downloads and driversCleaning an optical mouse Appendix B. Cleaning the mouseCleaning a mouse with a ball User Guide Appendix C. Manual modem commands Basic AT commandsLow speaker volume Set Pulse dial as defaultSet Tone Dial as default Internal speaker on until carrier detectedExtended AT commands MNP/V.42/V.42bis/V.44 commands Fax Class 1 commands Fax Class 2 commandsVoice commands Appendix C. Manual modem commands User Guide Appendix D. Notices Television output notice TrademarksIndex Page Page Part Number 19R0462