Dell Inspiron 620 Guide de démarrage rapide

www.dell.com | support.dell.com

Dell Precision™ WorkStation 620

System Memory Upgrade

0E137a00.book Page 1 Thursday, May 3, 2001 1:36 PM

0E137a00.book Page 2 Thursday, May 3, 2001 1:36 PM

www.dell.com | support.dell.com

Dell Precision™ WorkStation 620

System Memory Upgrade

0E137a00.book Page 1 Thursday, May 3, 2001 1:36 PM

Notes, Notices, and Cautions

Throughout this guide, blocks of text may be accompanied by an icon and printed in

bold type or in italic type. These blocks are notes, notices, and cautions, and they are

used as follows:

NOTE: A NOTE indicates important information that helps you make better use of

your computer system.

NOTICE: A NOTICE indicates either potential damage to hardware or loss

of data and tells you how to avoid the problem.

CAUTION: A CAUTION indicates a potentially hazardous situation which, if

not avoided, may result in minor or moderate injury.

____________________

Information in this document is subject to change without notice.

Reproduction in any manner whatsoever without the written permission of Dell Computer

Corporation is strictly forbidden.

Trademarks used in this text: Dell, Dell Precision, and the DELL logo are trademarks of Dell

Computer Corporation.

Other trademarks and trade names may be used in this document to refer to either the entities

claiming the marks and names or their products. Dell Computer Corporation disclaims any

proprietary interest in trademarks and trade names other than its own.

May 2001 P/N 0E137 Rev. A00

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support.dell.com System Memory Upgrade 1

Dell Precision™ WorkStation 620

System Memory Upgrade

This document provides instructions for upgrading the Rambus inline memory mod-

ules (RIMMs) on the Dell Precision WorkStation 620. Dell Precision 620 systems

support dual, direct, Rambus dynamic random-access memory (RDRAM) modules.

These RIMMs feature error checking and correction (ECC).

NOTES: Dell recommends that only a technically knowledgeable person perform this

procedure.

Dell recommends that you read the entire procedure before you begin. You must also

be familiar with removing the system cover and locating the RIMMs.

Dell recommends that you print the contents of the system User’s Guide for

referencing important information that may not be available during critical procedures.

This document is available on your Dell Precision ResourceCD and can also be

accessed from the User’s Guides icon on your current desktop if you have not

reinstalled the operating system.

Upgrading the BIOS

You must upgrade the basic input/output system (BIOS) before you upgrade the

RIMMs. Otherwise, the existing BIOS may not recognize the new RIMMs, and the

system will not operate.

To upgrade the BIOS:

1. Download the BIOS update utility for the computer to be updated from the Dell

support website.

a. Go to http://support.dell.com.

If this is your first time to use this website, complete the one-time

registration.

b. Click Downloads for Your Dell.

c. Enter your Service Tag Number for the computer to be updated or select the

appropriate Dell™ system.

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2 System Memory Upgrade

d. Select the appropriate operating system (OS) and language for the computer

to be updated.

e. Select FlashBIOS Updates for the download category.

f. Click Go and follow the instructions on screen to create a diskette containing

the BIOS update files.

NOTE: For some Dell systems, you are given a choice to create a diskette con-

taining the BIOS update files or to download a file you can use from the hard

drive. Select the choice to use the file that creates an installation diskette.

2. Insert the BIOS update diskette into the diskette drive of the computer to be

updated. Then restart the computer.

The computer automatically updates the BIOS from the diskette.

3. When the computer begins to restart and the Dell logo screen appears, remove

the diskette from the diskette drive so that the computer does not boot from the

diskette again.

Precautionary Measures

NOTICE: Before you upgrade the RIMMs, you must upgrade the BIOS. See

“Upgrading the BIOS” on page 1 for instructions.

Before you perform any of the procedures in this document, read the following notice

for your personal safety and to prevent damage to the system from electrostatic dis-

charge (ESD).

NOTICE: The procedure in this document requires that you remove the

cover and work inside your computer. Do not attempt to service the com-

puter except as explained in this document and elsewhere in Dell

documentation. Always follow installation and service instructions closely.

Before Removing the Cover

Before you remove the computer cover, perform the following steps in the sequence

indicated.

NOTICE: To help avoid possible damage to the system board, unplug your

computer system and wait 15 to 30 seconds before removing a component

from the system board or disconnecting a peripheral device from the

computer.

1. Turn off the computer and any peripherals.

2. Disconnect the computer and peripherals from their power sources. Also, discon-

nect any telephone or telecommunication lines from the computer.

Before disconnecting a peripheral from the computer or removing a component

from the system board, verify that the standby power light, located on the sys-

tem board, has turned off. If it is on, you may need to wait 15 to 30 seconds for it

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support.dell.com System Memory Upgrade 3

to go out (see the internal system board label that is attached to the cover of your

computer).

3. Ground yourself by touching an unpainted metal surface on the chassis, such as

the metal around the card-slot openings at the back of the computer, before

touching anything inside your computer. Dell recommends that you use a wrist

grounding strap in this operation.

While you work, periodically touch an unpainted metal surface on the computer

chassis to dissipate any static electricity that might harm internal components.

Doing so reduces the potential for personal injury or shock.

In addition, take note of these safety guidelines when appropriate:

•When you disconnect a cable, pull on its connector or on its strain-relief loop, not

on the cable itself. Some cables have a connector with locking tabs; if you are dis-

connecting this type of cable, press in on the locking tabs before disconnecting

the cable. As you pull connectors apart, keep them evenly aligned to avoid bend-

ing any connector pins. Also, before you connect a cable, make sure both

connectors are correctly oriented and aligned.

•Handle components and cards with care. Do not touch the components or con-

tacts on a card. Hold a card by its edges or by its metal mounting bracket. Hold a

component such as a RIMM by its edges, not by its pins.

Upgrading System Memory

NOTICE: Before you upgrade the RIMMs, you must upgrade the BIOS. See

“Upgrading the BIOS” on page 1 for instructions.

This computer has two memory expansion cards (MECs), both consisting of four

sockets: RIMM1_A, RIMM2_A, RIMM3_B, and RIMM4_B. On each MEC, sockets

RIMM1_A and RIMM2_A comprise channel A, and sockets RIMM3_B and RIMM4_B

comprise channel B.

Dell Precision 620 systems support a maximum of eight RIMMs (four RIMMs per

MEC) for up to 3 gigabytes (GB) of total memory.

NOTE: Although you can insert 512-megabyte (MB) RIMMs in each socket, the BIOS

revision only supports a maximum of 3 GB.

Figure 1 shows the RIMMs and RIMM sockets.

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4 System Memory Upgrade

Figure 1. RIMM Socket Designations

RIMM1_A

RIMM2_A

RIMM3_B

RIMM4_B

riser board

MEC cover

channel A

channel B

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support.dell.com System Memory Upgrade 5

RIMM Installation Guidelines

You must install RIMMs in pairs. This means that the RIMM in each socket on one

MEC must be the same memory capacity, density, and speed as the corresponding

RIMM in the same socket on the other MEC. Also, for either channel A or B of each

MEC, if one socket contains a RIMM, then the other socket must contain either

another RIMM or a continuity RIMM (CRIMM).

As an example, if you install only one pair of RIMMs in the RIMM1_A socket of each

MEC, then you must install a CRIMM in socket RIMM2_A of each MEC. Channel B

(sockets RIMM3_B and RIMM4_B) may remain empty, or it may contain one or two

CRIMMs per MEC (see Figure 1).

However, if channel A contains two RIMMs and you want to install additional RIMMs,

the preceding rules also apply for channel B.

NOTES: If 512-MB RIMMs are used, they must be populated starting with the bottom

RIMM socket (RIMM4_B, the one closest to the system board) and working up. For

example, see the configuration in the last row in Table 1. In this example, you would

insert the 512-MB RIMMs into the bottom three sockets (RIMM4_B, RIMM3_B,

RIMM2_A) and insert a CRIMM into the topmost socket (RIMM1_A).

When you add 512-MB RIMMs from a customer kit, you must remove all existing

RIMMs and reinstall the new 512-MB RIMMs, beginning with socket RIMM4_B and

working up on each riser board in mirror fashion.

Dell does not recommend or support the mixing of old and new 512-MB RIMMs in

sockets RIMM1_A and RIMM2_A.

Table 1. Sample Factory-Installed RIMM Configurations (per MEC)

For Total

Desired

Memory:

Populate both MECs as follows:

RIMM1_A (top) RIMM2_A RIMM3_B RIMM4_B

(bottom)

128 MB CRIMM 64 MB Empty Empty

256 MB CRIMM 128 MB Empty Empty

384 MB 128 MB 64 MB CRIMM Empty

512 MB 128 MB 128 MB CRIMM Empty

512 MB CRIMM 256 MB Empty Empty

768 MB 256 MB 128 MB CRIMM Empty

1024 MB 128 MB 128 MB 128 MB 128 MB

1024 MB 256 MB 256 MB CRIMM Empty

1536 MB 256 MB 256 MB 256 MB CRIMM

2048 MB 256 MB 256 MB 256 MB 256 MB

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6 System Memory Upgrade

To upgrade memory, perform the following steps.

NOTICE: See “Protecting Against Electrostatic Discharge” in your System

Information Guide.

CAUTION:Before you remove your computer cover, see “Safety First—For

You and Your Computer” in your system User’s Guide.

1. If you have not already done so, upgrade the BIOS.

See “Upgrading the BIOS”on page 1 for instructions.

2. Turn off the computer and peripherals, disconnect them from their electrical out-

lets, and wait 10 to 20 seconds.

3. Lay the computer on its right side.

4. Open the computer cover.

5. To lift the MEC from the system board, rotate the MEC cover up and remove the

MEC from the computer (see Figure 1).

NOTE: For instructions, see “Removing and Installing a Memory Expansion

Card”in your system User’s Guide.

6. Repeat Step 5 for the other MEC.

7. Install or remove RIMMs and CRIMMs as necessary to reach the desired mem-

ory total.

NOTE: For instructions on installing RIMMs, see “Installing a RIMM”on page 8.

For instructions on removing RIMMs, see “Removing a RIMM”on page 9.

8. Reinstall both MECs on the system board.

NOTE: For instructions, see “Removing and Installing a Memory Expansion

Card”in your system User’s Guide.

9. Close the computer cover.

10. Stand the computer upright.

2048 MB Empty CRIMM 512 MB 512 MB

2560 MB CRIMM 256 MB 512 MB 512 MB

3072 MB 256 MB 256 MB 512 MB 512 MB

3072 MB CRIMM 512 MB 512 MB 512 MB

Table 1. Sample Factory-Installed RIMM Configurations (per MEC)

(continued)

For Total

Desired

Memory:

Populate both MECs as follows:

RIMM1_A (top) RIMM2_A RIMM3_B RIMM4_B

(bottom)

0E137a00.book Page 6 Thursday, May 3, 2001 1:36 PM

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