Cisco Systems OL-2056-02 User Manual

CHAPTER

5

Installing Memory in the Router

This chapter describes procedures for adding and replacing memory in Cisco 3600 series routers, and
contains the following sections:

• Accessing the Mainboard, page 5-2

• Replacing DRAM and SDRAM, page 5-6

• Replacing Flash Memory SIMMs, page 5-19

• Replacing the ROM, page 5-24

• Closing the Router, page 5-29

• Installing and Configuring Flash Memory Cards in Cisco 3620, Cisco 3640, and Cisco 3660

Routers, page 5-34

• Installing and Formatting Compact Flash Memory Cards in Cisco 3631 Routers, page 5-44

Warning

Caution Before performing any procedures described in this chapter, review these sections:

Note When a procedure refers to the left side or right side of the chassis, it means as viewed from the front.

Onlytrainedandqualifiedpersonnel should be allowed to install or replace this equipment. Tosee
translations of the warnings that appear in this publication, refer to the

and Safety Information

• “Safety Recommendations” section on page 2-1

• “General Site Requirements” section on page 2-3

• “Installation Checklist” section on page 2-5

• “Required Tools and Equipment for Installation and Maintenance” section on page 2-7

document that accompanied this device.

Regulatory Compliance

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5-1

Accessing the Mainboard

Accessing the Mainboard

This section describes how to open the system in order to access the router’s internal components such
as memory modules and the ROM. You need a number 2 Phillips or flat-blade screwdriver to perform
this procedure.

Chapter 5 Installing Memory in the Router

Warning

Warning

Do not touch the power supply when the power cord is connected. For systems with a power
switch, line voltages are present within the power supply even when the power switch is OFF and
the power cord is connected. For systems without a power switch, line voltages are present
within the power supply when the power cord is connected. To see translations of the warnings
that appear in this publication, refer to the
document that accompanied this device.

Before performing any of the following procedures, ensure that power is removed from the DC
circuit. To ensure that all power is OFF,locate the circuit breaker on the panel board that services
the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the
circuit breaker in the OFF position. To see translations of the warnings that appear in this
publication, refer to the
accompanied this device.

Regulatory Compliance and Safety Information

Regulatory Compliance and Safety Information

Removing the Cisco 3620 or Cisco 3640 Router Cover

Use the following procedure to remove the cover:

Step 1 Power OFF the router. However, to channel ESD voltages to ground, do not unplug the power cable.

Warning

Before opening the chassis, disconnect the telephone-network cables to avoid contact with
telephone-network voltages. To see translations of the warnings that appear in this publication,
refer to the
device.

Regulatory Compliance and Safety Information

document that

document that accompanied this

5-2

Step 2 Remove all network interface cables from the rear panel.
Step 3 Place the router so that the front panel is facing you. Remove the three screws located on top of the cover

near the front edge. (See Figure 5-1 or Figure 5-2.) Set the screws aside in a safe place.

Step 4 Lift the front edge of the cover until it clears the front of the chassis. (See Figure 5-1 or Figure 5-2.)
Step 5 Pull the cover toward you until the metal tabs on the rear edge separate from the chassis bottom. (See

Figure 5-1 or Figure 5-2.)

Step 6 Lift the cover until it is free from the chassis and set it aside.

When you are ready to replace the cover, see the “Replacing the Cover on a Cisco 3620 or Cisco 3640

Router” section on page 5-30.

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Chapter 5 Installing Memory in the Router

Figure 5-1 Removing the Cisco 3620 Router Cover

Screw

Accessing the Mainboard

SYSTEM

RPS

CON

AUX

ACTIVE

0

1

READY

PCMCIA

1
0

H7241

Figure 5-2 Removing the Cisco 3640 Router Cover

Screw

SYSTEM

RPS

CON

AUX

ACTIVE

0

123

READY

1

PCMCIA

0

H7043

Removing the Cisco 3631 Router Cover

Perform the following procedure to remove the chassis cover:

Step 1 Power OFF the router. However, to channel ESD voltages to ground, do not unplug the power cable.

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5-3

Accessing the Mainboard

Chapter 5 Installing Memory in the Router

Warning

Before opening the chassis, disconnect the telephone-network cables to avoid contact
with telephone-network voltages. To see translations of the various warnings that
appear in this publication, refer to the Regulatory Compliance and Safety Information
document that accompanied this device.

Step 2 Disconnect all network interface cables from the rear panel.
Step 3 Place the router on a flat surface. Remove the five screws located on top of the cover.
Step 4 Rotate the cover up to a 45-degree angle. (See Figure 5-3.)
Step 5 Slide the cover to the side until the tabs are free from the slots. (See Figure 5-3.)

Figure 5-3 Removing the Cisco 3631 Router Cover

2

1 Lift cover 2 Slide cover

1

62483

5-4

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Chapter 5 Installing Memory in the Router

Removing the Cisco 3660 Mainboard Tray

Note In this publication, references to Cisco 3660 routers include both Cisco 3661 and Cisco 3662 models.

Use the following procedure to remove the mainboard tray:

Step 1 Power OFF the router. However, to channel ESD voltages to ground, do not unplug the power cable.

Accessing the Mainboard

Warning

Step 2 Remove all network interface cables from the mainboard tray’s rear panel.
Step 3 Place the router so that the rear panel is facing you.

Before opening the chassis, disconnect the telephone-network cables to avoid contact with
telephone-network voltages. To see translations of the warnings that appear in this publication,
refer to the
device.

Regulatory Compliance and Safety Information

document that accompanied this

There are two sets of screws on the mainboard rear panel: one set of captive screws, and one set of Torx
screws. (See Figure 5-4.)

Caution Do not remove or loosen the Torx screws.

Step 4 Loosen the two captive screws located in the upper corners. (See part 1, Figure 5-4.)
Step 5 Swing the two tray levers out, and slide the mainboard tray out of the chassis. (See parts 2 and 3,

Figure 5-4.)

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5-5

Replacing DRAM and SDRAM

ETH 0

ETH 3

ETHERNET

4E

ETH 2 ETH 1

123

ACT

LINK

0

CN/LP RXC

SERIAL 3 SERIAL 2

SERIAL 1 SERIAL 0

RXD TXC

TXD

CN/LP RXC RXD TXC TXD

CN/LP RXC RXD

TXC

TXD

CN/LP RXC RXD TXC TXD

EN

SERIAL
4T

VOICE
2V

V0

V1

EN

HIGH SPEED SERIAL
1HSSI

HS

TD

TC

RD

RC

LB/CN

Figure 5-4 Removing the Cisco 3660 Mainboard Tray

VCC OK
SYSTEM

Chapter 5 Installing Memory in the Router

1

FDX
LINK

100Mbps

VIC
FXS

IN USE

1

SEE MANUAL BEFORE INSTALLATION

FDX
LINK
100Mbps

1
0

IN USE

0

22

3

Caution The mainboard is an ESD-sensitive component. To avoid damage, observe all ESD precautions.

When you are ready to replace the mainboard tray,see the “Replacing the Cisco 3660 Mainboard Tray”

section on page 5-33.

Replacing DRAM and SDRAM

Cisco 3600 series routers use two types of dynamic random access memory (DRAM):

• DRAM SIMMs (Used in Cisco 3620 and Cisco 3640 Routers), page 5-7

• SDRAM DIMMs Used in the Cisco 3631 and Cisco 3660 Router, page 5-14

Tray levers

17335

Note SIMMs and DIMMs cannot be interchanged between the router models.

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Chapter 5 Installing Memory in the Router

DRAM SIMMs (Used in Cisco 3620 and Cisco 3640 Routers)

This section describes how to upgrade DRAM single in-line memory modules (SIMMs) in Cisco 3620
and Cisco 3640 routers. You might need to upgrade the DRAM SIMMs for the following reasons:

• You upgraded the Cisco IOS feature set or release and it requires additional DRAM.

• The router maintains large routing tables or other memory-intensive features, such as spoofing or

protocol translations.

The Cisco 3620 and Cisco 3640 routers each contain four 72-pin SIMM sockets (or banks) for DRAM.
Each socket can be filled with a single 32-bit-wide, 72-pin DRAM SIMM. You can configure DRAM as
a mixture of primary or main memory, which is reserved for the CPU, and shared memory, which is used
for data transmitted or received by modules and WAN interface cards.

To see how much memory is currently installed in the router, enter the show version command while the
router is in the privileged EXEC mode (Router# prompt). Near the middle of the resulting output, a
message similar to the following displays:

Cisco 3640(R4700) processor (revision 0x00) with 24576K/8192K bytes of memory.

This line shows how much memory is installed (in this example, 24576K/8192K). The first number
represents primary memory and the second number represents shared memory.

You can configure DRAM to be either 32 or 64 bits wide. To use 64-bit mode, you must install DRAM
SIMMs in pairs of the same size. Generally, basic software feature sets (such as IP) use 32-bit DRAM
SIMMs and robust software feature sets (such as Enterprise) use 64-bit DRAM SIMMs.

Replacing DRAM and SDRAM

Note In the Cisco 3620 router, DRAM supports 32-bit operation only, whereas in the Cisco 3640 router,

DRAM supports either 32- or 64-bit operation.

Note In 32-bit mode, the router performs approximately 20 percent slowerthan when DRAM is configured

for 64-bit mode operation.

Each SIMM socket corresponds to one bank of memory. Fill banks consecutively with no gaps; start
fillingbanks from 0, and empty banks starting with 3. Bank 0 must always be filled first and emptied last.

Only certain combinations of DRAM SIMMs are permitted. These combinations are shown inTable 5-1
for 32-bit configurations used in Cisco 3620 routers, Table 5-2 for 32-bit configurations used in
Cisco 3640 routers, and Table 5-3 for 64-bit configurations used in Cisco 3640 routers.

Follow these rules to use 64-bit mode DRAM configuration:

• SIMMs in banks 0 and 1 must be the same size (in MB) and have the same access time (in

nanoseconds).

• SIMMs in banks 2 and 3 must also be the same size and have the same access time.

• SIMMs in banks 2 and 3 must be less than or equal to the size of the SIMMs in banks 0 and 1.

Figure 5-5 or Figure 5-6 shows the DRAM SIMM locations in your router.

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Replacing DRAM and SDRAM

Figure 5-5 DRAM SIMM Locations in the Cisco 3620 Router

Chapter 5 Installing Memory in the Router

0123

DRAM SIMMs

Figure 5-6 DRAM SIMM Locations in the Cisco 3640 Router

0123

H7317

5-8

H7081

DRAM SIMMs

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Chapter 5 Installing Memory in the Router

Table 5-1 32-Bit DRAM Configuration for Cisco 3620 Routers

Replacing DRAM and SDRAM

Bank 0
(SIMM 0)

Bank 1
(SIMM 1)

Bank 2
(SIMM 2)

Bank 3
(SIMM 3)

Total
Memory

4 MB 4 MB 4 MB 4 MB 16 MB
4 MB 4 MB 8 MB Not installed 16 MB
8 MB 8 MB Not installed Not installed 16 MB
16 MB Not installed Not installed Not installed 16 MB
4 MB 16 MB Not installed Not installed 20 MB
4 MB 4 MB 4 MB 4 MB 16 MB
8 MB 8 MB 4 MB Not installed 20 MB
16 MB 4 MB Not installed Not installed 20 MB
8 MB 16 MB Not installed Not installed 24 MB
8 MB 8 MB 8 MB Not installed 24 MB
8 MB 8 MB 4 MB 4 MB 24 MB
16 MB 8 MB Not installed Not installed 24 MB
8 MB 8 MB 4 MB 8 MB 28 MB
8 MB 8 MB 8 MB 4 MB 28 MB
8 MB 8 MB 16 MB Not installed 32 MB
8 MB 8 MB 8 MB 8 MB 32 MB
16 MB 16 MB Not installed Not installed 32 MB
16 MB 16 MB 4 MB Not installed 36 MB
16 MB 16 MB 4 MB 4 MB 40 MB
16 MB 16 MB 8 MB Not installed 40 MB
16 MB 16 MB 4 MB 8 MB 44 MB
16 MB 16 MB 8 MB 4 MB 44 MB
16 MB 16 MB 8 MB 8 MB 48 MB
16 MB 16 MB 16 MB Not installed 48 MB
16 MB 16 MB 16 MB 4 MB 52 MB
16 MB 16 MB 16 MB 8 MB 56 MB
16 MB 16 MB 16 MB 16 MB 64 MB

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Replacing DRAM and SDRAM

Table 5-2 32-Bit DRAM Configuration for Cisco 3640 Routers

Chapter 5 Installing Memory in the Router

Bank 0 (SIMM0)Bank 1

(SIMM 1)

Bank 2
(SIMM 2)

Bank 3
(SIMM 3)

Total
Memory

4 MB 4 MB 8 MB Not installed 16 MB
16 MB Not installed Not installed Not installed 16 MB
4 MB 16 MB Not installed Not installed 20 MB
8 MB 8 MB 4 MB Not installed 20 MB
16 MB 4 MB Not installed Not installed 20 MB
8 MB 16 MB Not installed Not installed 24 MB
8 MB 8 MB 8 MB Not installed 24 MB
16 MB 8 MB Not installed Not installed 24 MB
8 MB 8 MB 4 MB 8 MB 28 MB
8 MB 8 MB 8 MB 4 MB 28 MB
8 MB 8 MB 16 MB Not installed 32 MB
16 MB 16 MB 4 MB Not installed 36 MB
16 MB 16 MB 8 MB Not installed 40 MB
16 MB 16 MB 8 MB 4 MB 44 MB
16 MB 16 MB 4 MB 8 MB 44 MB
16 MB 16 MB 16 MB 4 MB 52 MB
16 MB 16 MB 4 MB 16 MB 52 MB
16 MB 16 MB 16 MB 8 MB 56 MB
16 MB 16 MB 8 MB 16 MB 56 MB

5-10

Table 5-3 64-Bit DRAM Configuration for Cisco 3640 Routers

Bank 0
(SIMM 0)

Bank 1
(SIMM 1)

4 MB 4 MB 4 MB 4 MB 16 MB

1

8 MB

8 MB Not installed Not installed 16 MB
8 MB-Dual28 MB-Dual Not installed Not installed 16 MB
8 MB 8 MB 4 MB 4 MB 24 MB
8 MB-Dual 8 MB-Dual 4 MB 4 MB 24 MB
8 MB 8 MB 8 MB 8 MB 32 MB
8 MB 8 MB 8 MB-Dual 8 MB-Dual 32 MB
8 MB-Dual 8 MB-Dual 8 MB 8 MB 32 MB
8 MB-Dual 8 MB-Dual 8 MB-Dual 8 MB-Dual 32 MB
16 MB 16 MB – – 32 MB
16 MB 16 MB 4 MB 4 MB 40 MB
16 MB 16 MB 8 MB 8 MB 48 MB

Cisco 3600 Series Hardware Installation Guide

Bank 2
(SIMM 2)

Bank 3
(SIMM 3)

Total
Memory

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Chapter 5 Installing Memory in the Router

Table 5-3 64-Bit DRAM Configuration for Cisco 3640 Routers (continued)

Replacing DRAM and SDRAM

Bank 0
(SIMM 0)

16 MB 16 MB 8 MB-Dual 8 MB-Dual 48 MB
16 MB 16 MB 16 MB 16 MB 64 MB
32 MB-Dual332 MB-Dual Not installed Not installed 64 MB
32 MB-Dual 32 MB-Dual 4 MB 4 MB 72 MB
32 MB-Dual 32 MB-Dual 8 MB 8 MB 80 MB
32 MB-Dual 32 MB-Dual 8 MB-Dual 8 MB-Dual 80 MB
32 MB-Dual 32 MB-Dual 16 MB 16 MB 96 MB
32 MB-Dual 32 MB-Dual 32 MB-Dual 32 MB-Dual 128 MB

1. 8 MB = single-bank SIMM, 8 MB in size.

2. 8 MB-Dual = dual-bank SIMM, 8 MB in size.

3. 32 MB-Dual = dual-bank SIMM, 32 MB in size.

DRAM SIMM Orientation

SIMMs have a polarization notch to ensure proper orientation and alignment holes to ensure proper
positioning. Figure 5-7 shows the polarization notch and alignment holes on a SIMM. DRAM SIMMs
are installed with the connector edge down and the polarization notch near the front of the chassis.

Bank 1
(SIMM 1)

Bank 2
(SIMM 2)

Bank 3
(SIMM 3)

Total
Memory

Caution To avoid damaging ESD-sensitive components, observe all ESD precautions. To avoid damaging the

underlying mainboard, do not use excessive force when you remove or replace SIMMs.

Figure 5-7 DRAM SIMM

Alignment holes

H2407

Connector edge

Polarization notch

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Replacing DRAM and SDRAM

Removing DRAM SIMMS

Perform this procedure to remove DRAM SIMMs:

Step 1 Attach an ESD-preventive wrist strap and ensure that it makes good contact with your skin. Connect the

equipment end of the wrist strap to the metal back plate of the chassis, avoiding contact with the
connectors.

Step 2 On the mainboard, locate the DRAM SIMM sockets shown in Figure 5-5 or Figure 5-6.

Caution Handle SIMMs by the non-connector edges only. SIMMs are ESD-sensitive components and can be

damaged by mishandling.

Step 3 Remove one SIMM at a time, beginning with the SIMM in bank 3. To lift the SIMM out of its socket,

pull the locking spring clips on both sides outward and tilt the SIMM toward the right side of the chassis,
until it is free of the clips. (See Figure 5-8.)

Figure 5-8 Removing DRAM SIMMs

Chapter 5 Installing Memory in the Router

Top view

Front of chassis

2. Push the top of the
SIMM forward and down.

1. Pull the locking spring clips outward.

Step 4 Hold the SIMM by the edges with your thumb and index finger and lift it out of the socket. Place the

SIMM
polarization
notch

H7038

removed SIMM in an antistatic bag to protect it from ESD damage.

Step 5 Repeat Step 3 and Step 4 for each SIMM.

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Chapter 5 Installing Memory in the Router

Installing DRAM SIMMs

Perform this procedure to install DRAM SIMMs:

Step 1 Attach an ESD-preventive wrist strap and ensure that it makes good contact with your skin. Connect the

equipment end of the wrist strap to the metal back plate of the chassis, avoiding contact with the
connectors.

Step 2 On the mainboard, locate the DRAM SIMM sockets shown in Figure 5-5 or Figure 5-6.

Caution Handle SIMMs by the edges only. SIMMs are ESD-sensitive components and can be damaged by

mishandling.

Step 3 Hold the SIMM with the polarization notch on the right, near the front of the chassis, and with the

connector edge at the bottom.

Step 4 Beginning with bank 0, insert the SIMM into the socket at an angle, tilted toward the right side of the

chassis. Rock the SIMM into a vertical position (see Figure 5-9), using the minimum amount of force
required. When the SIMM is properly seated, the socket guide posts fit through thealignment holes, and
the locking spring clips click into place.

Step 5 Ensure that each SIMM is straight (perpendicular to the socket), and that the alignment holes (as shown

in Figure 5-9) line up with the plastic socket guides on the socket.

Replacing DRAM and SDRAM

Figure 5-9 Installing DRAM SIMMs

View from front of chassis

1. Insert the SIMM into the socket
at an angle from vertical.

2. Push the top of the SIMM
down and back.

The socket guide posts fit through

3.

the holes in the SIMM.

The locking springs clip the back

4.
of the SIMM.

H7037

Caution It is normal to feel some resistance when installing a SIMM, but do not use excessive force on the

SIMM, and do not touch the surface components.

Step 6 Repeat Step 3 through Step 5 for each SIMM.

When you finish replacing SIMMs, proceed to the “Replacing the Cover on a Cisco 3620 or Cisco 3640

Router” section on page 5-30.

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Chapter 5 Installing Memory in the Router

Replacing DRAM and SDRAM

SDRAM DIMMs Used in the Cisco 3631 and Cisco 3660 Router

This section describes how to upgrade synchronous dynamic random access memory (SDRAM) dual
in-line memory modules (DIMMs) in the Cisco 3631and Cisco 3660routers. You might need to upgrade
the SDRAM DIMMs for the following reasons:

• You upgraded the Cisco IOS feature set or release and it requires additional SDRAM.

• The router maintains large routing tables or other memory-intensive features, such as spoofing or

protocol translations.

The Cisco 3631 and Cisco 3660 routers contain two 168-pin DIMM sockets for SDRAM. Each socket
can be filled with a single 64-bit-wide, 168-pin SDRAM DIMM. You can configure SDRAM as a
mixture main memory, which is reserved for the CPU, and shared memory, which is used for data
transmitted or received by modules and WAN interface cards. See Figure 5-10 and Figure 5-11 for
DIMM locations.

To see how much memory is currently installed in the router, enter the show version command while the
router is in the privileged EXEC mode (Router# prompt). Near the middle of the resulting output, a
message similar to the following displays:

Cisco 3660(R527x) processor (revision 0x00) with 24576K/8192K bytes of memory.

This line shows how much memory is installed (in this example, 24576K/8192K). The first number
represents primary memory and the second number represents shared memory. Your router supports up
to 256 MB of SDRAM.

Each DIMM socket corresponds to one bank of memory. Fill banks from 0, and empty banks starting
with 1. Bank 0 must always be filled first and emptied last.

The Cisco 3631 router supports both parity and non-parity PC-100 DIMMs ranging in capacity from
64 MB to 128 MB. Only certain combinations of SDRAM DIMMs are permitted. (See Table 5-5.)

The Cisco 3660 router supports both parity and non-parity PC-100 DIMMs ranging in capacity from
16 MB to 128 MB. Only certain combinations of SDRAM DIMMs are permitted. (See Table 5-5.)

Note An advantage of parity DIMMs over non-parity DIMMs is easier identification of memory errors; a

disadvantage is lower processing speed.

Note To use a 64-bit mode SDRAM configuration, the DIMM in bank 1 must be less than or equal to the

size of the DIMM in bank 0.

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Chapter 5 Installing Memory in the Router

Figure 5-10 SDRAM DIMM Locations in the Cisco 3631 Router

0
1

Replacing DRAM and SDRAM

SDRAM DIMMs

Table 5-4 SDRAM Configurations for Cisco 3631 Routers

Bank 0 (SIMM 0) Bank 1 (SIMM 1) Total Memory

64 MB Not installed 64 MB
32 MB 32 MB 64 MB
32 MB 64 MB 96 MB
64 MB 32 MB 96 MB
128 MB Not installed 128 MB
64 MB 64 MB 128 MB
Not installed 128 MB 128 MB
32 MB 128 MB 160 MB
128 MB 32 MB 160 MB
64 MB 128 MB 192 MB
128 MB 64 MB 192 MB
128 MB 128 MB 256 MB

62578

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Replacing DRAM and SDRAM

Figure 5-11 SDRAM DIMM Locations in the Cisco 3660 Router

Chapter 5 Installing Memory in the Router

SDRAM DIMMs

10

Table 5-5 SDRAM Configurations for Cisco 3660 Routers

Bank 0 (SIMM 0) Bank 1 (SIMM 1) Total Memory

16 MB 16 MB 32 MB
32 MB Not installed 32 MB
32 MB 16 MB 48 MB
32 MB 32 MB 64 MB
64 MB Not installed 64 MB
64 MB 16 MB 80 MB
64 MB 32 MB 96 MB
64 MB 64 MB 128 MB
128 MB Not installed 128 MB
128 MB 16 MB 144 MB
128 MB 32 MB 160 MB
128 MB 64 MB 192 MB
128 MB 128 MB 256 MB

17337

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Chapter 5 Installing Memory in the Router

SDRAM DIMM Orientation

DIMMs have polarization notches to ensure proper orientation and alignment holes to ensure proper
positioning. Figure 5-12 shows the polarization notches and alignment holes on a DIMM.

Caution To avoid damaging ESD-sensitive components, observe all ESD precautions. To avoid damaging the

underlying mainboard, do not use excessive force when you remove or replace DIMMs.

Figure 5-12 SDRAM DIMM

Replacing DRAM and SDRAM

17338

Connector edge

Polarization notches

Alignment holes

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Replacing DRAM and SDRAM

Removing SDRAM DIMMS

Perform this procedure to remove SDRAM DIMMs:

Step 1 Attach an ESD-preventive wrist strap and ensure that it makes good contact with your skin. Connect the

equipment end of the wrist strap to the metal back plate of the chassis, avoiding contact with the
connectors.

Step 2 On the mainboard, locate the SDRAM DIMM sockets shown in Figure 5-11.

Caution Handle DIMMs by the edges only. DIMMs are ESD-sensitive components and can be damaged by

mishandling.

Step 3 Remove the DIMM by pushing the locking spring clips on both sides outward. This ejects the DIMM

from its socket. (See Figure 5-13.)

Figure 5-13 Removing and Installing SDRAM DIMMs

Chapter 5 Installing Memory in the Router

2

1

2

17943

Locking spring clips

Step 4 Hold the DIMM by the edges with your thumb and index finger and lift it out of the socket. Place the

removed DIMM in an antistatic bag to protect it from ESD damage.

Step 5 If necessary, repeat Step 3 and Step 4 for the other DIMM.

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