IBM 6623 User Manual

IBM

Installing

memory

modules

The

following

notes

describe

the

types

of

dual

inline

memory

modules

(DIMMs)

that

the

computer

supports

and

other

information

that

you

must

consider

when

installing

DIMMs:

v

The

computer

comes

with

either

two

256

MB

or

two

512

MB

memory

DIMMs

installed

in

DIMM

1

and

DIMM

2

memory

connectors.

The

second

pair

of

DIMMs

must

be

installed

in

DIMM

3

and

DIMM

4

memory

connectors

and

the

third

pair

in

DIMM

5

and

DIMM

6

memory

connectors.

v

DIMMs

must

be

installed

in

matched

pairs.

The

DIMMs

in

each

pair

must

be

the

same

size,

speed,

type,

and

technology

as

each

other

but

do

not

have

to

match

the

other

pairs.

You

can

mix

compatible

DIMMs

from

various

manufacturers.

v

Install

only

1.8

V,

184-pin,

double-data-rate

2

(DDR2),

PC2-3200,

registered,

synchronous

dynamic

random-access

memory

(SDRAM)

with

error

correcting

code

(ECC),

dual

inline

memory

modules

(DIMMs).

These

DIMMs

must

be

compatible

with

the

latest

PC2-3200

SDRAM

buffered

DIMM

specification.

For

a

list

of

supported

options

for

your

computer,

go

to

http://www.ibm.com/pc/;

then,

select

your

country

and

navigate

to

the

list

of

options

for

your

computer.

v

The

DIMM-installation

sequence

is

based

on

single-rank,

double-rank,

and

mixing

single-rank

and

double-rank

memory

DIMMs.

Single-rank

DIMMs

are

256

MB,

512

MB,

and

1

GB

memory

modules.

Double-rank

DIMMs

are

2

GB

memory

modules.

The

following

table

lists

the

DIMM-installation

sequence

for

the

computer

maximum

memory

capacity

using

mixed

single-rank

and

double-rank

DIMMs.

Notes:

1.

Do

not

install

four,

2

GB

double-rank

DIMMs

for

the

computer

maximum

capacity

(8

GB)

configuration,

the

computer

does

not

support

it.

2.

You

can

install

pairs

of

256

MB,

512

MB,

1

GB,

and

2

GB

DIMMs

in

the

computer,

but

for

the

computer

maximum

capacity,

you

must

use

the

DIMM-sequence

in

the

table

below.

3.

You

can

install

any

combination

of

DIMM

pairs

in

the

computer,

however,

you

can

install

only

two,

2

GB

double-rank

DIMMs

in

the

computer

and

they

must

go

in

DIMM

connectors

1

and

2.

Do

not

install

2

GB

double-rank

DIMMs

in

any

connectors

other

than

DIMM

connectors

1

and

2.

4.

If

you

order

memory

DIMMs

from

IBM,

the

variable

2R

in

the

description

indicates

that

the

DIMM

is

a

double-rank

2

GB

DIMM.

Table

2.

Maximum

memory

capacity

(8

GB)

and

installation

sequence

mixing

single-rank

and

double-rank

DIMMs

DIMM

pair

DIMM

connectors

DIMM

size

Rank

First

pair

1,

2

2

GB

Double-rank

Second

pair

3,

4

1

GB

Single-rank

Third

pair

5,

6

1

GB

Single-rank

v

The

system

board

contains

six

DIMM

connectors

and

supports

two-way

memory

interleaving

when

the

DIMMs

are

installed

in

pairs

and

functioning

properly.

If

one

DIMM

in

the

pair

fails,

the

computer

runs

in

single-channel

mode

(non-interleaving).

A

failed

DIMM

must

be

replaced

as

soon

as

possible;

otherwise,

the

computer

will

not

start

(boot).

v

The

DIMM

options

that

are

available

for

the

computer

are

256

MB,

512

MB,

1

GB,

and

2

GB

memory

modules.

The

computer

supports

a

minimum

of

512

MB

and

a

maximum

of

8

MB

(when

using

2

GB

double-rank

DIMMs)

of

system

memory.

32

IntelliStation

Z

Pro

Type

6223:

Installation

Guide