Asus RS120-E3/PA2 User Manual

Page 24

C h a p t e r 2 : H a r d w a r e s e t u p

2 - 8

2.3

System memory

2.3.1

DIMM sockets location

The system motherboard comes with four Double Data Rate II (DDR2) Dual
Inline Memory Modules (DIMM) sockets to support 240-pin DDR2 modules.

The figure illustrates the location of the DDR2 DIMM sockets:

2.3.2

Memory configurations

You may install 256 MB, 512 MB, 1 GB, and 2 GB unbuffered ECC or
non-ECC DDR2-533/667 DIMMs to the DIMM sockets.

•

Always install DIMMs with the same CAS latency. For optimum
compatibility, it is recommended that you obtain memory modules
from the same vendor. Visit the ASUS website for an updated DDR2
Qualified Vendors List for this motherboard.

•

Due to chipset resource allocation, and depending on the number of
expansion cards installed, the following conditions may occur:
- the system may detect less than 8 GB system memory when
you installed four 2 GB DDR2 memory modules
- may show an available memory space of less than 4 GB when
you installed four 1 GB DDR2 memory modules

•

Three DDR2 DIMMs installed into any three memory sockets will
function in Dual channel asymmetric mode.

•

When installing a single or two DIMMs, install the modules on the
blue slots (DIMM_A2/DIMM_B2). Refer to the recommended memory
configuration table below.

P5MT-R

P5MT-R 240-pin DDR2 DIMM sockets

DIMM_A1

DIMM_B2

DIMM_B1

DIMM_A2

12 Pins

128 Pins

M o d e

D I M M _ A 1

D I M M _ A 2

D I M M _ B 1

D I M M _ B 2

Single channel (1)

—

populated

—

(2)

—

populated

Dual channel (1)

populated

—

populated

—

(2)

—

populated

—

populated

(3)

populated

Dual channel (1)

populated

—

populated

(Asymmetric mode)

Recommended memory configurations