Memory Options - Lenovo ThinkServer RD450 Product Manual

Memory options

The ThinkServer RD450 supports DDR4 memory. DDR4 memory offers many benefits over older
generation DDR3 memory. DDR4 operates at a lower voltage than DDR3 (1.2V vs. 1.35V or 1.5V) and as a
result, offers significant power savings. In addition, the DDR4 DIMMs used with Xeon E5 v4 processors
have higher memory transfer speeds of up to 2400 MT/s, depending on the memory configuration.
Lenovo offers Registered DIMMs (RDIMM) and Load Reduced DIMMs (LRDIMM) that use a buffer to
reduce memory bus loading, which enables greater memory capacities to be achieved.
The following table lists the DDR4 memory options and ordering information.
Table 3. Memory Options
Part
number Description
4X70G88318 Lenovo ThinkServer 8GB DDR4-2400MHz (1Rx4) RDIMM
4X70G88319 Lenovo ThinkServer 16GB DDR4-2400MHz (2Rx4) RDIMM
4X70G88320 Lenovo ThinkServer 32GB DDR4-2400MHz (2Rx4) RDIMM
4X70G88321 Lenovo ThinkServer 64GB DDR4-2400MHz (4Rx4) LRDIMM
* Maximum supported with 1 processor installed / 2 processors installed
The server supports up to 8 DIMMs when one processor is installed and up to 16 DIMMs when two
processors are installed. Each processor has four memory channels, and there are two DIMMs supported
per channel.
The following table shows the characteristics of the supported DIMMs. All configurations allows the
DIMMs to operate at rated speed, provided the CPU selected also supports that speed. Tables cells
highlighted with a gray background indicate that the server supports higher memory frequencies than the
Intel processor specification.
Table 4. Maximum memory speeds
DIMM specification
Rank
Part numbers
Rated speed
Rated voltage
Maximum quantity supported*
Maximum DIMM capacity
Maximum memory capacity
Maximum memory at rated speed
Maximum operating speed
1 DIMM per channel
2 DIMMs per channel
* The maximum quantity that is supported is shown for two processors installed.
Protection against data loss is provided through the following memory RAS features:
ECC
Patrol and Demand Scrubbing
Sparing
Lenovo ThinkServer RD450 (E5-2600 v4)
RDIMM
Single rank
4X70G88318 (8 GB) 4X70G88319 (16 GB)
4X70G88320 (32 GB)
2400 MHz
1.2 V
16
8 GB
128 GB
64 GB
2400 MHz
2400 MHz
Dual rank
4X70G88321 (64 GB)
2400 MHz
1.2 V
16
32 GB
512 GB
64 GB
2400 MHz
2400 MHz
Maximum
supported*
8 / 16
8 / 16
8 / 16
8 / 16
LRDIMM
Quad rank
2400 MHz
1.2 V
16
64 GB
1024 GB
1 TB
2400 MHz
2400 MHz
10