IBM System x3650 M4 User Manual

IBM System x3650 M4 20
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 (Parts 1, 2, 3, and 4) 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: Intel Xeon processor E5-2600 v2 product family - RDIMMs)
DIMM
specification
RDIMM
Rank Single rank Dual rank
Part numbers 00D5024 (4 GB)
00D5036 (8 GB)
00D5020 (4 GB)
00D5032 (8 GB)
00D5044 (8 GB)
46W0672 (16 GB)
00D5048 (16 GB)
Rated speed 1600 MHz 1866 MHz 1600 MHz 1866 MHz
Rated voltage 1.35 V 1.5 V 1.35 V 1.5 V
Operating voltage 1.35 V 1.5 V 1.5 V 1.35 V 1.5 V 1.5 V
Max qty supported* 24 24 24 24 24 24
Max DIMM capacity 8 GB 8 GB 8 GB 16 GB 16 GB 16 GB
Max memory capacity 192 GB 192 GB 192 GB 384 GB 384 GB 384 GB
Max. memory at rated speed None 128 GB 64 GB None 256 GB 256 GB
Maximum operating speed
1 DIMM per channel 1333 MHz 1600 MHz 1866 MHz 1333 MHz 1600 MHz 1866 MHz
2 DIMMs per channel 1333 MHz 1600 MHz 1600 MHz 1333 MHz 1600 MHz 1866 MHz
3 DIMMs per channel 800 MHz 1066 MHz 1066 MHz 800 MHz 1066 MHz 1066 MHz
* The maximum quantity that is supported is shown for two processors installed.

IBM System x3650 M4 Specifications

General

Brand	IBM
Model	System x3650 M4
Category	Server
Language	English