Acer Altos R910 - Manual (Page 82)

3 System upgrade 72
DIMM modules
Each memory board on the server has four DIMM slots. Within the
memory board, the four DIMM slots are organized into two groups.
Each groups is referred to as a bank. You must install the correct type
of memory in each bank. Each slot supports 512 MB, 1 GB, 2 GB, and
4GB DDR2-400 (PC2-3200), ECC registered, 240-pin memory modules.
The maximum memory capacity is 64 GB.
DIMM module installation guidelines
The following rules apply when adding DIMMs to the memory boards:
• DIMMs must be populated in pairs, referred to as a bank. The two
banks of DIMMs are defined on each memory board as:
• Bank 1: DIMM slots 1A and 1B
• Bank 2: DIMM slots 2A and 2B
When only using two DIMMs, populate DIMM 1A and 1B slots first
to ensure dual-channel operating mode.
Refer to the table below for suggested DIMM population.
• Within a single bank, both DIMMs must be identical. Identical
DIMM size and identical number of devices on the DIMM.
• The system does not support mixed-sized DIMMs or DIMMs from
different vendors within the same bank.
Warning! Functionality issues may be encountered if mixed
memory types are installed on the memory board.
DIMM label Bank Population order
DIMM 1A
1 1
DIMM 1B
DIMM 2A
2 2
DIMM 2B