16 Server System Features
DIMMs must be populated in pairs across consecutive channels starting with the lowest numbered slot
in each channel. Slots A1 and B1 are paired, followed by slots C1 and D1. For performance reasons,
when configuring four DIMMs, DIMM pairs A2 and B2 should never be populated before DIMM pair
C1 and D1. A four DIMM configuration should be populated as A1 and B1; C1 and D1.
In non-mirrored mode, all DIMMs with the same slot number within a given branch must match (size,
technology, manufacturer). It is not required to match DIMMs between different slot numbers.
DIMMs must meet the following requirements:
• Use only Fully Buffered DIMMs (FBD) with DDR2 DRAM technology.
• Use only FBD DDR2-533 and FBD DDR2-667 stacked DIMM modules.
In determining your memory requirements, the need for memory sparing or memory mirroring must
be considered.
Memory Sparing and Mirroring
The chipset includes hardware that supports memory mirroring and memory on-line sparing. Both
memory mirroring and memory on-line sparing provide a way to prevent data loss in case a DIMM
fails.
In a mirrored system, the maximum usable memory is one-half of the installed memory, with a
minimum of four DIMMs installed. Since the data is duplicated across DIMMs, it means that up to
one-half of the installed DIMMs are actively in use at any one time. The remaining DIMMs are used
for mirroring.
Memory mirroring and memory sparing are mutually exclusive. Only one can be active at a time.
Optional Hardware
Remote Management Module
The Remote Management Module is available to provide advanced server mangement features.
One 10/100 Mbps NIC mezzanine card is included for dedicated remote access.
