IBM System x3630 M3
12
Memory options
IBM DDR3 memory is compatibility tested and tuned for optimal System x performance and throughput.
IBM memory specifications are integrated into the light path diagnostics for immediate system
performance feedback and optimum system uptime. From a service and support standpoint, IBM memory
automatically assumes the IBM system warranty, and IBM provides service and support worldwide.
The server supports 12 DIMM slots. When one processor is installed, then only six DIMM slots can be
used. When two processors are installed, then all 12 DIMM slots can be used. The server supports
single-rank, dual-rank, and quad-rank RDIMMs. The maximum amount of memory is achieved when two
processors are installed and 16 GB quad-rank RDIMMs are used for a total of 192 GB (96 GB per CPU).
Each CPU has three memory channels and there are two DIMMs per channel. Maximum memory speed
is limited by memory speed supported by the specific processor and by the number and type of DIMMs
installed (whichever has a lower memory speed rating), as follows:
Intel Xeon 5600 series processors:
1333 MHz when one or two single-rank or dual-rank RDIMMs per channel are installed
1066 MHz when one quad-rank RDIMM per channel is installed
800 MHz when two quad-rank RDIMMs per channel are installed
Intel Xeon 5500 series processors: Quad-core and dual-core processors in the x3630 M3 only
support memory speed at 800 MHz.
The server supports both 1.5 V and 1.35 V DIMMs. However, mixing the DIMMs with different voltage is
not supported. Only systems with Intel Xeon 5600 series processors support the 1.35 V DIMMs.
The following memory protection technologies are supported:
ECC
ChipKill (for x4-based RDIMMs)
Memory mirroring
If memory mirroring is used then DIMMs must be installed in pairs (minimum of one pair per each CPU),
and both DIMMs in a pair must be identical in type and size.
The following table lists memory options available for the x3630 M3 server.
Table 5. Memory options
Part
number
Feature
code
Description
Maximum
supported
Standard models
where used
49Y1405
8940
2GB (1x2GB, 1Rx8, 1.35V) PC3L-10600
CL9 ECC DDR3 1333MHz LP RDIMM
12
-
49Y1406
8941
4GB (1x4GB, 1Rx4, 1.35V) PC3L-10600
CL9 ECC DDR3 1333MHz LP RDIMM
12
A2x, B2x, C2x, D2x,
F2x, 64x, G2x
49Y1407
8942
4GB (1x4GB, 2Rx8, 1.35V) PC3L-10600
CL9 ECC DDR3 1333MHz LP RDIMM
12
-
49Y1397
8923
8GB (1x8GB, 2Rx4, 1.35V) PC3L-10600
CL9 ECC DDR3 1333MHz LP RDIMM
12
C4x
49Y1400
8939
16GB (1x16GB, 4Rx4, 1.35V) PC3L-8500
CL7 ECC DDR3 1066MHz LP RDIMM
12
-
