Acer AB460 F1 - Manual (Page 235)

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Mirroring or Lockstep mode: Single Processor
Configuration
Please follow the table as shown below.
The same rule is applied to the CPU2 memory channel.
For mirroring mode, there is a primary and a copy of the primary
image. By this definition, the effective size of memory is reduced by at
least one-half.
32GB 16GB 16GB
48GB 16GB 16GB 16GB
64GB 16GB 16GB 16GB 16GB
96GB 16GB 16GB 16GB 16GB 16GB 16GB
128GB 16GB 16GB 16GB 16GB 16GB 16GB 16GB 16GB
Total
Capacity
DIMM 1B DIMM 1A DIMM 2A DIMM 3A
2GB 1GB 1GB
4GB 2GB 2GB
8GB 4GB 4GB
16GB 8GB 8GB
32GB 16GB 16GB
Total
Capacity
CPU 1 CPU2
DIMM 1B 1A 2A 3A 1B 1A 2A 3A