English – Intel GA-945PL-S3P User Manual

Page 15

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Hardware Installation

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English

Dual Channel Memory Configuration

GA-945PL-DS3P/GA-945PL-S3P supports the Dual Channel Technology.
After operating the Dual Channel Technology, the bandwidth of Memory Bus
will add double.

GA-945PL-DS3P/GA-945PL-S3P includes 4 DIMM sockets, and each Channel has two DIMM sockets
as following:

Channel 0 : DDRII1, DDRII2
Channel 1 : DDRII3, DDRII4

If you want to operate the Dual Channel Technology, please note the following explanations due
to the limitation of Intel chipset specifications.

1. Dual Channel mode will not be enabled if only one/three DDRII memory module is

installed.

2. To enable Dual Channel mode with two or four memory modules (it is recommended to

use memory modules of identical brand, size, chips, and speed), install the memory
according to the dual channel memory configuration table below (Figure 1).

Memory configurations in Figure 2 will result in memory frequency being reduced from the original
frequency. (DS: Double Side, SS: Single Side, X: Empty)

Figure 1

2 memory modules

4 memory modules

DDRII1

DDRII2

DDRII3

DDRII4

DS/SS

X

DS/SS

X

DS/SS

X

X

DS/SS

X

DS/SS

DS/SS

X

X

DS/SS

X

DS/SS

SS

SS

SS

SS

Dual Channel Memory Configuration Table (DS: Double Side, SS: Single Side, X: Empty)

Figure 2

2 memory modules

3 memory modules

4 memory modules

DDRII1

DDRII2

DDRII3

DDRII4

SS

SS

X

X

X

X

SS

SS

SS

SS

DS/SS

X

SS

SS

X

DS/SS

DS/SS

X

SS

SS

X

DS/SS

SS

SS

SS

SS

SS

SS

Because of chipset limitations, do not populate both DIMM sockets of the same channel with
double-sided memory modules to prevent system's failure to start or incorrect detection of
memory modules,

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