IBM System x3250 M4, Installation & User Manual

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Table 4. Supported UDIMM population per channel (continued)
DIMM
connectors per
channel
DIMMs installed
in each channel DIMM type
DIMM speed
Ranks per
DIMM (any
combination)
2 2 Unbuffered
DDR3 ECC 1066, 1333,
1600 Single-rank,
dual-rank
v
The following table lists the maximum DIMM population using ranked UDIMMs.
Table 5. Maximum memory population using ranked UDIMMs (depending on your model)
Number of UDIMMs DIMM type Size Total memory
4 Single-rank UDIMMs 1 GB 4 GB
4 Dual-rank UDIMMs 2 GB 8 GB
4 Dual-rank UDIMMs 4 GB 16 GB
4 Dual-rank UDIMMs 8 GB (when
available) 32 GB
v The following table shows the UDIMM memory population rule to optimize the
system performance.
Table 6. UDIMM population rule
DIMM connector 1 DIMM connector 2 DIMM connector 3 DIMM connector 4
Populated Empty Empty Empty
Populated Empty Populated Empty
Populated Populated Populated Populated
Installing a memory module
The following illustration shows the location of the DIMM connectors on the system
board.
DIMM 1 DIMM 2 DIMM 3 DIMM 4
Microprocessor
DIMM 4 DIMM 3 DIMM 2 DIMM 1
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IBM System x3250 M4 Type 2583: Installation and User’s Guide