Lenovo 3650 M4 7915K9G User Manual
Product codes
7915K9G
IBM System x3650 M4
19
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).
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.
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.
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
specification
RDIMM
Rank
Single rank
Dual rank
Part numbers
00D5024 (4 GB)
00D5036 (8 GB)
00D5036 (8 GB)
00D5020 (4 GB)
00D5032 (8 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
128 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
1600 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.