IBM x3100 M5 Type 5457 Installation And Service Manual page 292

Unbuffered DIMMs (UDIMMs):
The following notes provide information that you must consider when you install
UDIMMs:
v The memory channels run at the lowest common frequency of the DIMMs
v The UDIMM options that are available for the server are 1 GB, 2 GB, 4 GB, and
v The server supports up to two single-rank or dual-rank UDIMMs per channel.
The following table lists the supported UDIMM population.
The following table lists the maximum DIMM population using ranked UDIMMs.
The following table shows the UDIMM memory population rule to optimize the
system performance.
The following illustration shows the location of the DIMM connectors on the
system board.
Note: The illustrations in this document might differ slightly from your model.
276
System x3100 M5 Type 5457: Installation and Service Guide
installed.
8 GB (when available) DIMMs.
Table 35. Supported UDIMM population per channel
DIMM DIMMs
connectors per installed in each
channel channel
2 1
2 2
Table 36. Maximum memory population using ranked UDIMMs (depending on your model)
Number of
UDIMMs DIMM type
4 Single-rank UDIMMs 1 GB
4 Dual-rank UDIMMs
4 Dual-rank UDIMMs
4 Dual-rank UDIMMs
Table 37. UDIMM population rule
DIMM connector 1 DIMM connector 2
Populated Empty
Populated Empty
Populated Populated
DIMM type DIMM speed
Unbuffered 1333, 1600
DDR3 ECC
Unbuffered 1333, 1600
DDR3 ECC
Size
2 GB
4 GB
8 GB (when
available)
DIMM connector 3
Empty
Populated
Populated
Ranks per
DIMM (any
combination)
Single-rank,
dual-rank
Single-rank,
dual-rank
Total memory
4 GB
8 GB
16 GB
32 GB
DIMM connector 4
Empty
Empty
Populated