2.4System memory

2.4.1Overview

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

The figure illustrates the location of the DDR DIMM sockets:

128 Pins

112 Pins

DDR_B3

DDR_A3

DDR_B2

DDR_A2

DDR_B1

DDR_A1

NCLV-D2 Series 240-pin DDR2 DIMM sockets

2.4.2Memory configurations

You may install 256 MB, 512 MB, 1 GB, 2 GB, and 4 GB registered ECC DDR2-400 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, 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 DDR DIMMs intalled into any three memory sockets will function in single-channel mode.

•If you are installing only one memory module, install into the blue socket labeled DDR_A3 or DDR_B3. Installing into any other socket would not work.

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Chapter 2: Hardware information