Asus NCL-D User Manual - Page 34

2.4 System memory 2.4.1 Overview 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: NCL-DE Series ® 128 Pins NCL-DE Series 240-pin DDR2 DIMM sockets 112 Pins DIMM_B4 DIMM_A4 DIMM_B3 DIMM_A3 DIMM_B2 DIMM_A2 DIMM_B1 DIMM_A1 2.4.2 Memory 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. 2-14 Chapter 2: Hardware information