HP ProLiant DL580 G3 Server - Manual (Page 97)

Memory options 97
• The server can be configured for any AMP mode in RBSU. RBSU displays a
warning message if the selected AMP mode is not supported by the current
DIMM configuration. However, if the DIMM configuration at POST does
not match the AMP mode selected in RBSU, the server defaults to Advanced
ECC ("Advanced ECC memory" on page
97 ). When this occurs, a message
displays during POST and the status LED for the configured AMP mode
flashes amber.
• Unpopulated memory boards (those without any installed DIMMs) can be
installed in the server for storing extra memory boards.
• If your server contains more than 4 GB of memory, consult your operating
system documentation for additional requirements.
Single- and dual-rank DIMMs
PC2-3200 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.
Certain configuration requirements exist with single- and dual-rank DIMMs that
allow the architecture to optimize performance. A dual-rank DIMM is similar to
having two separate DIMMs on the same module. Although only a single DIMM
module, a dual-rank DIMM acts as if it were two separate DIMMs. The primary
reason for the existence of dual-rank DIMMs is to provide the largest capacity
DIMM given the current DIMM technology. If the maximum DIMM technology
allows for creating 2-GB single-rank DIMMs, a dual-rank DIMM using the same
technology would be 4-GB.
Advanced ECC memory
Advanced ECC is the default memory protection mode for this server. In
Advanced ECC, the server is protected against correctable memory errors. The
server will provide notification if the level of correctable errors exceeds a
predefined threshold rate. The server does not fail because of correctable
memory errors.