HP ProLiant DL365 G5 Server - Manual (Page 38)

Hardware options installation 38
Memory configurations
The memory subsystem for this server is divided into two branches. Each memory branch is essentially a
separate memory controller. The DIMMs map to the two branches as indicated in the following table:
DIMM slot DIMM slot
DIMM 1A DIMM 5C
DIMM 2A DIMM 6C
DIMM 3B DIMM 7D
DIMM 4B DIMM 8D
If the server contains more than 4 GB of memory, consult the operating system documentation about
accessing the full amount of installed memory.
Advanced ECC memory
Advanced ECC memory is the default memory protection mode for this server. In Advanced ECC, the
server is protected against correctable memory errors. The server provides notification if the level of
correctable errors exceeds a pre-defined threshold rate. The server does not fail because of correctable
memory errors. Advanced ECC provides additional protection over Standard ECC because it is possible
to correct certain memory errors that would otherwise be uncorrectable and result in a server failure.
Whereas standard ECC can correct single-bit memory errors, Advanced ECC can correct single-bit
memory errors and multi-bit memory errors if all failed bits are on the same DRAM device on the DIMM.
In addition to general configuration requirements, Advanced ECC memory also has the following
configuration requirement:
• DIMMs must be installed in pairs.
• DIMM pairs in a memory bank must have identical HP part numbers.
In Advanced ECC mode, DIMMs must be populated as specified in the following table:
Configuration Bank A
1A and 2A
Bank B
3B and 4B Bank C
5C and 6C Bank D
7D and 8D
Single-processor 1st 2nd — —
Dual-processor 1st 3rd 2nd 4th
Installing DIMMs
1. Power down the server (on page 18 ).
2. Extend the server from the rack, if applicable (" Extend the server from the rack " on page 19 ).
3. Remove the access panel (on page 20 ).
4. Open the DIMM slot latches.