Registered Dimms (Rdimms) - IBM 7328C1U Installation And User Manual

v The following table lists the maximum DIMM population using ranked UDIMM.
v The following table lists the UDIMM memory population rule to optimize the

Registered DIMMs (RDIMMs)

The following notes provide information that you must consider when you install
RDIMMs:
v The memory channels run at the fastest common frequency of the installed
v Do not use both RDIMMs and UDIMMs in the same server.
v The server supports up to three single-rank, dual-rank, or quad-rank RDIMMs per
v The RDIMM options that are available for the server are 1 GB, 2 GB, 4 GB, and
v You can install a maximum of 32 GB of memory in the server when you use
v The following table lists the supported RDIMM population.
Table 5. Maximum memory population using ranked UDIMMs (depending on your model)
Number of UDIMMs DIMM type
4 single-rank UDIMMs
4 single-rank UDIMMs
4 dual-rank UDIMMs
4 dual-rank UDIMMs
system performance.
Table 6. UDIMMs population rule for dual-channel symmetric mode
DIMMs DIMMs
connector 1 connector 2
populated empty
populated empty
populated populated
DIMMs.
channel.
8 GB (when available) memory DIMMs.
RDIMMs.
Table 7. Supported RDIMM population per channel
DIMMs slots DIMMs installed
per channel in each channel DIMM type
3 1
3 2
3 3
3 1
3 2
DIMM size
1 GB
2 GB
2 GB
4 GB (when
available)
DIMMs DIMMs
connector 3 connector 4
empty empty
empty populated
empty populated
DIMM speed
Registered 1066, 1333
DDR3 ECC
Registered 1066, 1333
DDR3 ECC
Registered 800
DDR3 ECC
Registered 1066
DDR3 ECC
Registered 800
DDR3 ECC
Chapter 2. Installing optional devices
Total memory
4 GB
8 GB
8 GB
16 GB
DIMMs DIMMs
connector 5 connector 6
empty empty
empty empty
populated empty
Ranks per
DIMM (any
combination)
single-rank,
dual-rank
single-rank,
dual-rank
single-rank,
dual-rank
quad-rank
quad-rank
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