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Table-2:Recommended memory population guide for Optimal
performance
CPU0
CPU1
Channel A
Channel B
Channel A
Channel B
# of
DIMMs
A1 A0 B1 B0 A1
A0
B1
B0
2
DIMMs
X
X
4
DIMMs
X
X
X
X
8
DIMMs
X X X X X
X
X
X
Note: S8225 Memory Configuration Guidelines For Optimal Memory Performance
1. Populate DIMMs in groups of two, one per channel (2, 4 DIMMs/CPU).
• Partial population will lead to memory performance degradation.
2. Populate the same amount of memory on each CPU in the system.
3. Populate the same DIMM type in each channel. Specifically:
• Use the same DIMM size.
• Use the same # of ranks per DIMM.
4. Use the highest frequency supported per configuration. (Check Table-1 for details)
5. Additional recommendations:
• Dual-rank DIMMs are recommended over single-rank DIMMs.
• Unbuffered DIMMs can offer slightly better performance than registered DIMMs if
populating only a single DIMM per channel.
1). “
√”
indicates a populated DIMM slot.
2). If installing only
one
processor, you can choose CPU0.
