DIMM installation guidelines

You must observe the following guidelines when installing additional memory:

• Always install memory in pairs of identical DIMMs.
• Install only ECC PC-3200 DDR 400 or PC2700 DDR 333 Registered SDRAM DIMMs that meet the following specifications:
  • Supply voltage: 2.6 V
  • Bus width: 72 bits
• If installing 1-GB DIMMs, dual-rank DIMMs must be installed closest to the processor.

  NOTE: Dual-rank DIMMs can be identified by 2R or 2R x8 on the DIMM label.

• Install DIMMs with the same speed.
• Install DIMMs into both slots within a single bank.
• Memory must be installed in pairs (banks) beginning with banks farthest away from each populated processor (banks B and D).
• Install DIMMs with the smallest capacity in banks farthest from the processor.
• Memory banks for processor 1 must always be populated.
• For optimal performance, populate processor 2 memory banks.
• Processor 2 can be installed without memory.
• Any memory installed into banks for processor 2 can be used only if processor 2 is installed.

  CAUTION: Always wear an antistatic wrist strap when working inside the server.