HP ProLiant BL25p Server-Blade - Manual (Page 29)

Hardware Options Installation 29
Memory Option
The server blade ships with two DIMMs installed in processor 1 memory bank 1.
The server blade supports up to 16 GB of memory. Each processor has two banks
consisting of two DIMM slots in each bank.
CAUTION: Use only HP DIMMs. DIMMs from other sources
may adversely affect data integrity.
DIMM Guidelines
Observe the following DIMM installation guidelines:
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All DIMMs must be PC3200 DDR 400-MHz SDRAM DIMMs.
Both DIMM slots in a memory bank must be populated.
Both DIMMs in a memory bank must be identical.
Processor 1 memory bank 1 must always be populated.
If mixing dual- and single-rank DIMMs, the dual-rank DIMMs must be
installed in memory bank 1.
For optimal performance in most applications, populate memory bank 1 for
every populated processor socket.
Single- and Dual-Rank DIMMs
PC3200 DIMMs can either be single- or dual-rank. While it is not normally
important for you to differentiate between these two types of DIMMs, certain
DIMM configuration requirements are based on these classifications.