Asus DSBF-DE BULK User Guide - Page 35
System memory
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2.4 System memory 2.4.1 Overview The motherboard comes with eight fully-buffered DIMM (FB-DIMM) sockets to support 240-pin FB-DIMM modules. An FB-DIMM module has a different pin-out from DDR2 DIMMs so you cannot install DDR2 DIMMs on an FB-DIMM socket. Note that an FB-DIMM socket has an Advanced Memory Buffer (AMB) chip that allows memory-to-CPU connection at gigabit speed. The figure illustrates the location of the FB-DIMM sockets: ® 128 Pins DSBF-DE Series 240-pin FB-DIMM sockets 112 Pins FB-DIMM_31 FB-DIMM_30 FB-DIMM_21 FB-DIMM_20 FB-DIMM_11 FB-DIMM_10 FB-DIMM_01 FB-DIMM_00 2.4.2 Memory configurations You may install 256 MB, 512 MB, 1 GB, 2 GB, and 4 GB registered ECC FB‑DIMMs into the DIMM sockets. • For optimum compatibility, we recommend that you obtain memory modules from the same vendor. Refer to the Qualified Vendors List on the ASUS web site. • This motherboard does not support memory modules made up of 128 Mb chips x16 memory modules. • If you are installing only one memory module, install into the white socket labeled DIMM_00. Installing into any other socket will not work. ASUS DSBF-DE Series 2-15