HP ProLiant DL320 G5 Server - Manual (Page 29)

Hardware options installation 29
Hardware options installation
Memory options
The server memory can be expanded by installing PC5300 DDR2 unbuffered SDRAM DIMMs. The server
supports up to four ECC DDR2 SDRAM DIMMs.
The server supports standard memory configuration for maximum performance with up to 8 GB of active
memory (four 2-GB memory modules).
Interleaving and non-interleaving memory configuration
The server supports interleaving and non-interleaving memory configurations. Interleaving memory
increases bandwidth by enabling simultaneous access to multiple blocks of data. For example, to overlap
read-writes, the server divides the system memory between pairs of DIMMs, and then writes to and reads
from each DIMM concurrently. For an interleaving configuration, always install identical DIMMs in pairs.
For a non-interleaving configuration, install a single DIMM in slot 1 only.
DIMM installation guidelines
Observe the following guidelines when installing additional memory:
• DIMMs installed in the server must be unbuffered DDR2 SDRAM, 2.5 V, 64 bits wide, and ECC.
• All DIMMs installed must be the same speed (DDR2 PC5300). Do not install DIMMs supporting
different speeds.
• If only a single DIMM is installed, HP recommends installing it in slot 1A.
BIOS detects the DIMM population and sets the system as follows:
• Single-bank mode: DIMMs installed in one bank only.
• Dual-bank interleaved mode: DIMMs installed in both banks with equal bank capacities.
The following table lists some, but not all, possible configurations. For best performance, HP recommends
dual-bank interleaved mode configurations.
Slot 1A Slot 2B Slot 3A Slot 4B Total memory Mode
512 MB — — — 512 MB Single-bank
512 MB — 512 MB — 1 GB Dual-bank interleaved
1 GB — — — 1 GB Single-bank
1 GB — 1 GB — 2 GB Dual-bank interleaved
1 GB 1 GB 1 GB 1 GB 4 GB Dual-bank interleaved