BX920 S4
Upgrade and Maintenance Manual
165
Main memory
– Within a channel, populate modules in descending order of capacity.
– If memory modules with different speeds are used, the lowest clock rate
applies for all DIMMs.
Regardless of the mode, all DIMMs will run at the highest common
frequency that is allowed by the SPD Data of the DIMMs and the maximum
speed of the selected configuration.
– Mixing RDIMMs or LRDIMMs is not allowed.
– Mixing ECC and non-ECC DIMMs is not allowed.
Figure 56: Overview of the DIMM slot numbering
DIMM 1D
DIMM 2F
DIMM 1F
DIMM 2D
DIMM 1E
DIMM 2E
DIMM 2C
DIMM 1C
DIMM 2B
DIMM 1B
DIMM 1A
DIMM 2A
Front
CPU 1
CPU 2
