User's Manual (1.0c)

2-10
X9SRi/X9SRE Motherboard Series User’s Manual
Memory Population Guidelines
When installing memory modules, the DIMM slots should be populated in the follow-
ing order: DIMMA1, DIMMB1, DIMMC1, DIMMD1 then DIMMA2, DIMMB2, DIMMC2,
DIMMD2.
• 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 1 ,3 ,5 ,or 7 modules. However, for best memory
performance, install DIMM modules in pairs (2, 4, 6, 8, as below).
Recommended Population (Balanced)
DIMMA1 DIMMB1 DIMMC1 DIMMD1 DIMMA2 DIMMB2 DIMMC2 DIMMD2 Total
System
Memory
2GB 2GB 4GB
2GB 2GB 2GB 2GB 8GB
2GB 2GB 2GB 2GB 2GB 2GB 12GB
2GB 2GB 2GB 2GB 2GB 2GB 2GB 2GB 16GB
4GB 4GB 8GB
4GB 4GB 4GB 4GB 16GB
4GB 4GB 4GB 4GB 4GB 4GB 24GB
4GB 4GB 4GB 4GB 4GB 4GB 4GB 4GB 32GB
8GB 8GB 16GB
8GB 8GB 8GB 8GB 32GB
8GB 8GB 8GB 8GB 8GB 8GB 48GB
8GB 8GB 8GB 8GB 8GB 8GB 8GB 8GB 64GB
16GB 16GB 32GB
16GB 16GB 16GB 16GB 64GB
16GB 16GB 16GB 16GB 16GB 16GB 96GB
16GB 16GB 16GB 16GB 16GB 16GB 16GB 16GB 128GB
32GB 32GB 64GB
32GB 32GB 32GB 32GB 128GB
32GB 32GB 32GB 32GB 32GB 32GB 192GB
32GB 32GB 32GB 32GB 32GB 32GB 32GB 32GB 256GB
Note: Up to 256GB of memory are supported using ECC QR (Quad
Rank or 4-Rank) registered DIMM technology at 1600/1333/1066/800
MHz. Up to 64GB of memory are supported using non-ECC
UDIMMs.