Hardware options installation 29
Item Description Definition
1 Size —
2 Rank 1R = Single-rank
2R = Dual-rank
4R = Quad-rank
3 Data width x4 = 4-bit
x8 = 8-bit
4 Memory speed 10600 = 1333-MHz
8500 = 1067-MHz
5 DIMM type R = RDIMM (registered)
E = UDIMM (unbuffered with ECC)
For the latest supported memory information, see the QuickSpecs on the HP website
(http://www.hp.com
).
Memory configurations
To optimize server blade availability, the server blade supports the following AMP modes:
• Advanced ECC—provides the greatest memory capacity for a given DIMM size, while providing up
to 8-bit error correction, depending on the specific DIMM type. This mode is the default option for
this server blade.
• Mirrored Memory—provides maximum protection against failed DIMMs. Uncorrectable errors in one
channel are corrected by the mirror channel.
• Lockstep—provides enhanced protection while making all installed memory available to the
operating system. The server blade can continue to function if a single- or mulit-bit memory failure
within a single DRAM device occurs.
Advanced Memory Protection options are configured in RBSU. If the requested AMP mode is not
supported by the installed DIMM configuration, the server blade boots in Advanced ECC mode. For more
information, see "HP ROM-Based Setup Utility (on page 55)."
For the latest memory configuration information, see the QuickSpecs on the HP website
(http://www.hp.com
).
RDIMM maximum memory configurations
The following table lists the maximum memory configuration possible with 8-GB RDIMMs.
Rank Single-processor Dual-processor
Single-rank 48 GB 96 GB
Dual-rank 48 GB 96 GB
Quad-rank 32 GB 64 GB
UDIMM maximum memory configurations
The server blade supports a maximum of 12 GB with one processor and 24 GB with two processors using
2-GB single- or dual-rank UDIMMs.
