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14 SPARC Enterprise M4000/M5000 Servers Product Notes for XCP Version 1050 September 2007
Here are the DIMM mount conditions:
In each group, 4 DIMMs are mounted in a unit.
The capacity of the DIMMs in group A must be equal to or larger than the
capacity of the DIMMs in group B. You need not necessarily mount DIMMs in
group B.
In each of the groups, mount the DIMM of same capacity and of same rank. The
DIMMs of different capacity can’t be mixed in a group.
To replace with the DIMMs of different capacity or different rank, you need to
follow the above conditions on every memory board in the same CMU.