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#### DIMM Population Rules

Use these rules when adding DIMMs to the server.

- The server supports 4 GB and 8 GB DIMMs

- DIMMs must be added in pairs. Slots pairings are color coded.

- All DIMMs controlled by a given CPU should be the same capacity and rank (All supported 4 GB and 8 GB DIMMs are dual-rank). Mixed configurations are supported, but might result in lower memory performance.

- DIMM population must consist of equally loading each CPU with the same configuration. That is, the identical DIMM configuration should be replicated for each CPU in your system.

- DIMM slots are numbered DIMM 0 — DIMM 7 with DIMM 0 residing closest to the CPU (center of the board)

- The following table shows the DIMM slot pairing, pair numbering, and the order of population.

Slot | Color | Pair Number | Population Order
--- | --- | --- | ---
DIMM 7 | White | 3 | First pair
DIMM 6 | White | 3
DIMM 5 | Black | 2 | 2nd pair
DIMM 4 | Black | 2
DIMM 3 | White | 1 | 3rd pair
DIMM 2 | White | 1
DIMM 1 | Black | 0 | 4th pair
DIMM 0 | Black | 0

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