Hardware options installation 17
6.
After installing the power supply and connecting the power cables, slide the top panel to install it in
the chassis.
7. To lock the top panel on the chassis, insert the screw at the rear of the chassis.
8. Close the panel door of the server, and use the HP ProLiant MicroServer’s key to lock the panel door.
Memory options
The memory subsystem in this server can support DIMM and UDIMM. Both types are referred to as
DIMMs when the information applies to both types. When specified as UDIMM, the information applies to
that type only. All memory installed in the server must be the same type.
The server supports single- and dual-rank DIMMs operating at 800 MHz, with a maximum memory
capacity of 8 GB.
Memory subsystem architecture
The memory subsystem in this server is divided into channels. Each processor supports two channels, and
each channel supports two DIMM slots, as shown in the following table.
Channel Slot Slot number
1 A 1
2 B 2
This multi-channel architecture provides enhanced performance in Advanced ECC mode. This architecture
also enables the Mirrored Memory and Lockstep memory modes. This server supports UDIMMs.
DIMM slots in this server are identified by number and by letter. Letters identify the slots to populate for
specific AMP modes. Slot numbers are reported by ROM messages during boot and are included in error
reporting.
Single- and dual-rank DIMMs
DIMM configuration requirements are based on these classifications:
• Single-rank DIMM−One set of memory chips that is accessed while writing to or reading from the
memory.
• Dual-rank DIMM−Two single-rank DIMMs on the same module, with only one rank accessible at a
time.
The server memory control subsystem selects the proper rank within the DIMM when writing to or reading
from the DIMM.
Dual-rank DIMMs provide the greatest capacity with the existing memory technology. For example, if
current DRAM technology supports 2-GB single-rank DIMMs, a dual-rank DIMM would be 4-GB.
UDIMM maximum memory configurations
The server supports a maximum of 8 GB using 4-GB dual-rank UDIMMs.
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