Lenovo System x3850 X6 Product Manual page 18

Part Feature
number code
95Y4812 A5UK
DDR3 RDIMMs and LRDIMMs (for use with E7 v2 and v3 processors, except for 00D5024)
00D5024** A3QE
46W0741* A451
* Withdrawn from marketing
** 00D5024 is supported only in Compute Books with E7 v2 processors
† 00KH391 is supported only in Compute Books with E7-8880 v3 or E7-8890 v3 processors; no other
memory DIMM is supported if 00KH391 is installed
The following rules apply when selecting the memory configuration:
The server supports RDIMMs and LRDIMMs.
DDR4 Compute Books support mixing 2133 MHz and 2400 MHz DDR4 memory.
Mixing different types of memory (combinations of RDIMMs, LRDIMMs, and 3DS RDIMMs) is not
supported.
Mixing different generations of memory (DDR3 and TruDDR4) is not supported
The maximum number of ranks per one memory channel is six with RDIMMs, 12 with LRDIMMs, or
24 with 3DS RDIMMs.
In RAS (lockstep) mode, DIMMs must be installed in a pair.
The maximum quantity of DIMMs that can be installed in the server depends on the number of
processors, DIMM type, rank, and operating voltage, as shown in the "Maximum qty supported"
row in the following table.
All DIMMs in the server operate at the same speed, which is determined as the lowest value of one
of the following options:
Memory speed that is supported by the specific processor.
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 following table.
The following tables show the characteristics of the supported DIMMs. Table cells that are highlighted
with a gray background indicate that the server supports higher memory frequencies or larger memory
capacity (or both) than the Intel processor specification defines.
Memory speed: In performance mode, memory channels operate independently, and the SMI2 link
operates at twice the DDR3 speed. In RAS mode, two channels operate synchronously, and the SMI2 link
operates at the DDR3 speed.
Lenovo System x3850 X6 (6241)
Description
64GB TruDDR4 Memory (4Rx4,1.2V)
PC4-17000 CL15 2133MHz LP LRDIMM
4GB (1x4GB, 1Rx4, 1.35V) PC3L-12800
CL11 ECC DDR3 1600MHz LP RDIMM
64GB (1x64GB, 8Rx4, 1.35V) PC3-10600
DDR3 1333MHz LP LRDIMM
Maximum Models
supported where used
96 (24 per CPU) -
96 (24 per CPU) -
96 (24 per CPU) -
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