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2.3
System memory
2.3.1
Overview
The motherboard comes with six 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:
2.3.2
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 RS520-X5/PS8
2-7
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