Chapter 2: Installation
2-9
Memory Population Guidelines
When installing memory modules, the DIMM slots should be populated in the following
order: DIMMA2, DIMMB2, DIMMA1 and DIMMB1.
• Always use DDR3 DIMM modules of the same size, type and speed.
• Mixed DIMM speeds can be installed. However, all DIMMs will run at the speed
of the slowest DIMM.
• The motherboard will support one DIMM module or three DIMM modules installed.
For best memory performance, install DIMM modules in pairs.
Recommended Population (Balanced)
DIMMA2 Slot DIMMB2 Slot DIMMA1 Slot DIMMB1 Slot Total System Memory
2GB 2GB 4GB
2GB 2GB 2GB 2GB 8GB
4GB 4GB 8GB
4GB 4GB 4GB 4GB 16GB
8GB 8GB 16GB
8GB 8GB 8GB 8GB 32GB
Note: 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.
Memory Support
The X9SAE Motherboard Series supports up to 32GB of Unbuffered (UDIMM)
DDR3 ECC/Non-ECC 1600/1333/1066 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:
DIMMB2 (Blue Slot)
DIMMB1
DIMMA1
DIMMA2 (Blue Slot)
Towards the edge of the motherboard
Towards the CPU
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