User`s manual
Chapter 2: Installation
2-11
Memory Support
The X9SCi-LN4/X9SCA series supports up to 32GB of Unbuffered (UDIMM)
DDR3 ECC 1333/1066 MHz in 4 memory slots. Populating these DIMM modules
with a pair of memory modules of the same type and same size will result in
interleaved memory, which will improve memory performance. Please refer to
the table below:
Memory Population Guidelines
Please follow the table below when populating the X9SCi-LN4/X9SCA series.
DDR3 Unbuffered ECC (UDIMM) Memory
DIMM Slots per
Channel
DIMMs Populat-
ed per Channel
DIMM Type POR Speeds Ranks per DIMM (any
combination)
2 1 Unbuffered
DDR3
1066, 1333 Single Rank, Dual Rank
2 2 Unbuffered
DDR3
1066, 1333 Single Rank, Dual Rank
Notes
•Due to memory allocation to system devices, the amount of memory that
remains available for operational use will be reduced when 4 GB of RAM
is used. The reduction in memory availability is disproportional. See the
following table for details.
•For Microsoft Windows users: Microsoft implemented a design change in the
Windows XP with Service Pack 2 (SP2) and Windows Vista. This change is
specic to the behavior of Physical Address Extension (PAE) mode which
improves driver compatibility. For more information, please read the following
article at Microsoft’s Knowledge Base website at: http://support.microsoft.
com/kb/888137.
Slot A, Channel 2
(Blue Slot)
Slot B, Channel 2
Slot B, Channel 1
Slot A, Channel 1
(Blue Slot)
Towards the edge of the motherboard
Towards the CPU