IBM System x3350 Type 4192 Problem Determination And Service Manual page 98

v Each DIMM in a pair must be the same size, speed, type, and technology to
v If you install a second pair of DIMMs in the DIMM 2 and DIMM 4 connectors,
v The server can operate in single channel mode or dual channel mode.
v DIMM population is based on single-rank, double-rank, or mix single-rank and
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IBM System x3350 Type 4192 and 4193: Problem Determination and Service Guide
DIMM connector 1
DIMM connector 2
DIMM connector 3
DIMM connector 4
ensure that the server will operate correctly.
they do not have to be the same size, speed, type, and technology as the
DIMMs in the DIMM 1 and DIMM 3 connectors. However, the size, speed, type,
and technology of the DIMMs that you install in the DIMM 2 and DIMM 4
connectors must match each other.
double-rank DIMMs. DIMMs must be installed in order, starting with the DIMM
connector that is farthest from the memory controller hub. Double-rank DIMMs
must be installed in the DIMM connector that is farthest from the memory
controller hub when you install a combination of single-rank and double-rank
DIMMs. The following tables show examples of populating the server with
different combinations of single-rank and double-rank DIMMs.
Table 6. Interleave Mode DIMM slot population
First pair
DIMM 1 DIMM 3
Single-rank Single-rank
Single-rank Single-rank
Double-rank Double-rank
Second pair
DIMM 2 DIMM 4
Single-rank Single-rank
Double-rank Double-rank
Single-rank Single-rank
Remarks
Recommend this
configuration as
the first choice.
Recommend this
configuration as
the second
choice.