Lenovo ThinkStation P920 Manual - Página 8

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The following guidelines are recommended by Lenovo for obtaining the best

memory bandwidth from your P720 when filling DIMM slots:

 In single CPU configurations, only DIMM slots for CPU1 can be

utilized. For dual CPU configurations, all DIMM slots can be utilized.

 In dual CPU configurations, it is optimal to balance memory across

CPUs. This applies to both DIMM quantity and capacity. While the

system will function with unbalanced DIMMs, overall memory

performance could be affected.

 For best memory bandwidth performance, Lenovo recommends

optimizing the overall memory configuration to use 6 DIMMs per

CPU.

 Once DIMM quantity and DIMM capacity have been balanced across

CPUs (if necessary), users should follow the recommended fill order

for each CPU found in Figure 4. Largest capacity DIMMs should be

installed first if using mixed DIMM capacities.

Figure 4 shows the recommended DIMM slot fill order for each CPU installed in the

system.

Figure 4 - P720 DIMM Slot Fill Order Recommendations

# of DIMMs per CPU

1 DIMM

2 DIMMs

3 DIMMs

4 DIMMs

5 DIMMs

6 DIMMs

Note: Memory configurations using 5 DIMMs per CPU are not recommended as they are

unbalanced configurations that could result in memory performance degradation.

- 5 DIMM per CPU configurations will function, but should be avoided as they present an

unbalanced load to the CPU that could result in memory bandwidth degradation.

DIMM slots used for each CPU

DIMM 3

DIMM 3, DIMM 5

DIMM 1, DIMM 3, DIMM 5

DIMM 3, DIMM 4, DIMM 5, DIMM 6

Not Recommended

DIMM 1, DIMM 2, DIMM 3, DIMM 4,

DIMM 5, DIMM 6