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2-16 Chapter 2: Hardware information
2.4 System memory
2.4.1 Overview
The motherboard comes with sixteen 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 gure illustrates the location of the FB-DIMM sockets:
2.4.2 Memory congurations
You may install 512 MB, 1 GB, 2 GB, 4 GB, and 8 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 Qualied Vendors List on the ASUS
web site.
• The FB-DIMM 800 MHz has to work with the 1600MHz FSB CPU or above;
otherwise the memory module downgrades and runs at the speed of
667MHz.
• If you are installing only one memory module, install into the white socket
labeled DIMM_00. Installing into any other socket will not work.
®
DSEB-D16 Series
240-pin FB-DIMM sockets
112 Pins128 Pins
FB-DIMM_10
FB-DIMM_12
FB-DIMM_11
FB-DIMM_13
FB-DIMM_00
FB-DIMM_02
FB-DIMM_01
FB-DIMM_03
FB-DIMM_30
FB-DIMM_32
FB-DIMM_33
FB-DIMM_31
FB-DIMM_20
FB-DIMM_22
FB-DIMM_23
FB-DIMM_21