HP ProLiant DL785 G5 and G6 Servers - Maintenance and Service Guide, Seventh Edition

17. Install the processor memory cell into the server.
18. Power up the server.
DIMMs
Each processor memory cell can hold two to eight DIMMs, At least one pair of DIMMs must be
installed in slots 1A and 2A on each processor memory cell to operate the server. The following
DDR2 667-MHz DIMM sizes are supported:
• 1 GB
• 2 GB
• 4 GB
• 8 GB
Maximum memoryMinimum memoryNumber of processors
256 GB (32 8-GB DIMMS)8 GB (eight 1-GB DIMMS)4
512 GB (64 8-GB DIMMS)16 GB (16 1-GB DIMMS)8
Observe the following DIMM installation guidelines to add additional memory to the server:
• DIMMs must be installed in pairs.
• DIMM installed on the same memory bank (DIMM pairs) must have the same part number.
• DIMMs installed in different memory banks can be of different sizes.
• A minimum of two DIMMs must be installed per processor memory cell.
• DIMM pairs must be installed evenly across processor memory cells.
• DIMMs must be installed in decreasing capacity with the largest DIMMs installed in the
banks furthest away from each processor.
NOTE: If all four banks on a memory node are populated, the maximum memory clock
speed is 533 MHz. If two or fewer banks on a memory node are populated, the maximum
memory clock speed is 677 MHz.
CAUTION: DIMM fillers are required to cover pairs of empty DIMM slots.
To remove a DIMM:
1. Power down the server (“Power down the server” (page 25)).
2. Remove the processor memory cell (“Processor memory cell” (page 29)).
3. Remove the processor memory cell airflow baffle (“Processor memory cell airflow baffle”
(page 30)).
4. Open the DIMM slot latches.
5. Remove the DIMM.
To replace the component, reverse the removal procedure.
36 Removal and replacement procedures