2.4System memory

2.4.1Overview

The motherboard comes with eight Double Data Rate 2 (DDR2) Dual Inline Memory Modules (DIMM) sockets to support 240-pin DDR2 modules.

The figure illustrates the location of the DDR2 DIMM sockets:

128 Pins

112 Pins

DIMM_B4

DIMM_A4

DIMM_B3

DIMM_A3

DIMM_B2

DIMM_A2

DIMM_B1

DIMM_A1

NCL-DS Series 240-pin DDR2 DIMM sockets

2.4.2Memory configurations

You may install 256 MB, 512 MB and 1 GB registered ECC DDR2 DIMMs into 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. Refer to the DDR2 Qualified Vendors List at the ASUS web site.

•Due to chipset resource allocation, the system may detect less than 16 GB system memory when you installed eight 2 GB DDR2 memory modules.

•This motherboard does not support memory modules made up of 128 Mb chips or double-rank x16 memory modules.

•If you are installing only one memory module, install into the blue socket labeled DIMM_B4. Installing into any other socket would not work.

ASUS NCL-DS Series

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