Acer R910 Series manual Dimm modules, Dimm module installation guidelines

72 3 System upgrade

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.

DIMM label Bank Population order

DIMM 1A

11

DIMM 1B

DIMM 2A

22

DIMM 2B

•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.