NO TE
A quad-rank LRDIMM generates the same electrical load as a single-rank RDIMM on a
memory bus.
Table 5-6
DDR4 memory specifications
Parameter
Specifications
Maximum capacity per DDR4 DIMM (GB)
128
Rated speed (MT/s)
2933
Operating voltage (V)
1.2
Maximum number of DDR4 DIMMs in a server
a
32
Maximum DDR4 memory capacity of the server (GB)
b
4096
Maximum operating
speed (MT/s)
1DPC
c
2933
d
2DPC
2666
● a: The maximum number of DDR4 memory modules is based on four-processor
configuration. The value is halved for a server with two processors.
● b: The maximum DDR4 memory capacity varies depending on the processor
type. The value listed in this table is based on the assumption that DIMMs are
fully configured.
● c: DPC (DIMM per channel) indicates the number of DIMMs per channel.
● d: If the Cascade Lake processor is used, the maximum operating speed of a
DIMM can reach 2933 MT/s. If the Skylake processor is used, the maximum
operating speed of a DIMM can reach 2666 MT/s only. Different CPUs possess
different specifications, For details about the CPU parameters, see the Intel
official website.
● The information listed in this table is for reference only. For details, consult the
local sales representative.
5.4.1.4 DIMM Installation Rules
●
Observe the following when configuring DDR4 memory modules:
–
Install memory modules only when corresponding processors are installed.
–
Do not install LRDIMMs and RDIMMs in the same server.
–
Install filler memory modules in vacant slots.
●
Observe the following when configuring DDR4 memory modules in specific
operating mode:
–
Memory sparing mode
▪
Comply with the general installation guidelines.
▪
Each memory channel must have a valid online spare configuration.
FusionServer 2488 V5 Server
Technical White Paper
5 Hardware Description
Issue 06 (2023-12-12)
Copyright © xFusion Digital Technologies Co., Ltd.
24
