Asus NCL-DS1R1 User Manual - Page 35

2.4 System memory 2.4.1 Overview The motherboard comes with eight Double Data Rate (DDR) Dual Inline Memory Modules (DIMM) sockets to support 184-pin DDR modules. The figure illustrates the location of the DDR DIMM sockets: 80 Pins 104 Pins NCL-DS1 Series 184-pin DDR DIMM sockets 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, 1 GB, and 2 GB registered ECC DDR 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 DDR 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-DS1 Series 2-15