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The following rules apply when selecting the memory configuration:
Server supports UDIMMs, RDIMMs, HyperCloud DIMMs (also known as HCDIMMs), and LRDIMMs.
Mixing different types of memory (UDIMMs, RDIMMs, HyperCloud DIMMs, and LRDIMMs) is not
supported.
16 GB HyperCloud DIMMs and 32 GB HyperCloud DIMMs cannot be mixed.
Mixing 1.5 V and 1.35 V DIMMs is supported; in such a case, all DIMMs operate at 1.5 V.
Maximum number of ranks per one channel is eight (with the exception of Load Reduced DIMMs
and HyperCloud DIMMs where more than eight ranks are supported, because one quad-rank
LRDIMM or HCDIMM provides the reduced electrical load on a memory bus).
The maximum quantity of DIMMs that can be installed in the server depends on the number of
CPUs, DIMM type, rank, and operating voltage, as shown in the "Max. qty supported" row in Table
5.
All DIMMs in the server operate at the same speed, which is determined as the lowest value of:
Memory speed that is supported by the specific CPU.
Lowest of maximum operating speeds for selected memory configuration that depends on
rated speed, operating voltage, and quantity of DIMMs per channel, as shown under
"Maximum operating speed" section in the table.
The following table shows the characteristics of the supported DIMMs. Tables cells highlighted with a gray
background indicate when the combination of DIMM voltage and the number of DIMMs per channel still
allows the DIMMs to operate at a rated speed.
Table 5. Maximum memory speeds (Part 1: RDIMMs)
DIMM
specification
Rank
Part numbers
Rated speed
Rated voltage
Operating voltage
Max qty supported*
Max DIMM capacity
Max memory capacity
Max. memory at rated speed
Maximum operating speed
1 DIMM per channel
2 DIMMs per channel
3 DIMMs per channel
* The maximum quantity that is supported is shown for two processors installed.
System x3650 M4 (E5-2600 v2)
Single rank
00D5024 (4 GB)
00D5020 (4 GB)
00D5036 (8 GB)
00D5032 (8 GB)
1600 MHz
1.35 V
1.35 V
1.5 V
24
24
8 GB
8 GB
192 GB
192 GB
None
128 GB
1333 MHz
1600 MHz
1333 MHz
1600 MHz
800 MHz
1066 MHz
RDIMM
00D5044 (8 GB)
46W0672 (16 GB)
1866 MHz
1600 MHz
1.5 V
1.35 V
1.5 V
1.35 V
24
24
8 GB
16 GB
192 GB
384 GB
64 GB
None
1866 MHz
1333 MHz
1600 MHz
1333 MHz
1066 MHz
800 MHz
Dual rank
00D5048 (16 GB)
1866 MHz
1.5 V
1.5 V
1.5 V
24
24
16 GB
16 GB
384 GB
384 GB
256 GB
256 GB
1600 MHz
1866 MHz
1600 MHz
1866 MHz
1066 MHz
1066 MHz
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