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Please do follow the memory module installation instructions to install the DIMMs, and make sure
At least one CPU is installed
If two CPUs are installed, install at least 1 DIMM for JCPU0.
Try to split the DIMMs evenly across the CPUs.
Please use memory modules of the same capacity, speed and from the same manufacturer to avoid
compatibility issues.
Recommended DIMM Population Scheme
The table below shows the recommended schemes for DIMM population. To guarantee balanced system
performance, please
install
same manufacturer.
Processor
JDDR #
1 DIMM
2 DIMMs
Number of DIMMs
Installed
3 DIMMs
for 1 CPU
4 DIMMs
6 DIMMs
2 DIMMs
4 DIMMs
Number of DIMMs
6 DIMMs
Installed
8 DIMMs
for 2 CPUs
10 DIMMs
12 DIMMs
DDR4 Memory Support vs. System Memory Speed
The table below lists the supported DDR4 types and the theoretical overall system memory speed. For
optimal system speed, please install
from the same manufacturer.
DIMM
Data
Type
Rank
Width
x4
SR
x8
RDIMM
x8
DR
x4
identical DIMMs of the same capacity, speed, number of ranks, and from the
JCPU0
4
2
0
5
identical DIMMs of the same capacity, speed, number of ranks, and
DIMM Capacity (GB)
DRAM Density
4Gb
8Gb
8GB
16GB
4GB
8GB
8GB
16GB
16GB
32GB
36
Chapter 2: Hardware Installation
JCPU1
7
9
14
12
10
Speed (MT/s)
Voltage (V): 1.2V
1 DIMM per Channel
2666 MT/s
15
17
19
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