Memory
Lenovo DDR4 memory is compatibility tested and tuned for optimal System x performance and reliability.
Lenovo DDR4 memory has a unique signature programmed into the DIMM, which enables System x
servers to verify whether the memory installed is qualified and supported. From a service and support
standpoint, Lenovo memory automatically assumes the system warranty, and Lenovo provides service and
support worldwide.
The System x3250 M6 server has four DIMM slots, and it supports DDR4 UDIMMs with ECC memory
protection. The processor has two memory channels and supports two DIMMs per channel.
The following rules apply when selecting the memory configuration:
The server supports memory configurations with 1, 2, 3, or 4 UDIMMs.
The server supports 2133 MHz and 2400 MHz UDIMMs. Mixing 2133 MHz UDIMMs and 2400 MHz
UDIMMs is supported; however, all UDIMMs in the server will run at the same lower speed up to
2133 MHz.
The server supports up to 2400 MHz memory speeds for one DIMM per channel and two DIMMs
per channel configurations, provided that the processors and memory UDIMMs support this
memory speed (see Processors and Memory for details).
The following table summarizes memory speeds and capacities that are supported by the System x3250
M6 server.
Table 8. System x3250 M6 maximum memory speeds and capacities
DIMMs per channel
UDIMM
Memory bus speed Maximum capacity
2400 MHz UDIMMs
1 DPC 2400 MHz 32 GB (2x 16 GB)
2 DPC 2400 MHz 64 GB (4x 16 GB)
2133 MHz UDIMMs
1 DPC 2133 MHz 32 GB (2x 16 GB)
2 DPC 2133 MHz 64 GB (4x 16 GB)
The following table lists memory options available for the System x3250 M6 server.
Table 9. Memory options
Description
Part
number
Feature
code
Maximum
supported
UDIMMs - 2400 MHz
8GB TruDDR4 2400 MHz (1Rx8, 1.2V) ECC UDIMM 01KN321 AVKM 4
16GB TruDDR4 2400 MHz (2Rx8, 1.2V) ECC UDIMM 01KN325 AVKN 4
UDIMMs - 2133 MHz
8GB (1x8GB, 2Rx8, 1.2V) PC4-17000 DDR4 2133MHz LP ECC UDIMM 46W0813 ATPU 4
16GB (1x16GB, 2Rx8, 1.2V) PC4-17000 DDR4 2133MHz LP ECC UDIMM 46W0817 ATRZ 4
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