Configuring and using DDR3 memory with HP ProLiant Gen8 Servers

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Figure 3. HP DDR3 Memory Part Number Decoder
Populating memory in ProLiant Gen8 servers
ProLiant Gen8 memory slot configurations
The ProLiant Gen8 servers feature three different memory slot configurations:
• Either 24 or 16 memory slots total for servers using E5-2600 series processors.
• 12 memory slots total for servers using E5-2400 series processors
For ProLiant Gen8 servers, we recommend populating all memory channels whenever possible. This ensures the best
memory performance.
Population rules for ProLiant Gen8 servers
For optimal performance and functionality, it is necessary to adhere to the following population rules. Violations may
result in reduced memory capacity, or error messages during boot.
Rules for populating processors and DIMM slots
• Install DIMMs only if the corresponding processor is installed.
• If only one processor is installed in a two-processor system, only half of the DIMM slots are available.
• To maximize performance, we recommend balancing the total memory capacity between all installed processors and
load the channels similarly whenever possible.
• When two processors are installed, balance the DIMMs across the two processors.
• White DIMM slots denote the first slot to be populated in a channel.
• Place the DIMMs with the highest number of ranks in the white slot when mixing DIMMs of different ranks on the same
channel.