Memory options

IMPORTANT: This server does not support mixing LRDIMMs, RDIMMs, UDIMMs, or HDIMMs. Attempting to mix any combination of these DIMMs can cause the server to halt during BIOS initialization.

The memory subsystem in this server can support LRDIMMs, RDIMMs, UDIMMs, or HDIMMs:

• UDIMMs represent the most basic type of memory module and offer lower latency in one DIMM per channel configurations and (relatively) low power consumption, but are limited in capacity.
• RDIMMs offer larger capacities than UDIMMs and include address parity protection.
• LRDIMMs support higher densities than single- and dual-rank RDIMMs, and higher speeds than quad-rank RDIMMs. This support enables you to install more high capacity DIMMs, resulting in higher system capacities and higher bandwidth.
• HDIMMs provide faster speeds than other DIMMs. 12 DIMMs per processor are required with HDIMMs.

All types are referred to as DIMMs when the information applies to all types. When specified as LRDIMM, RDIMM, UDIMM, or HDIMM, the information applies to that type only. All memory installed in the server must be the same type.

The server supports the following DIMM speeds:

• Single- and dual-rank PC3-10600 (DDR3-1333) RDIMMs operating at up to 1333 MT/s
• Single- and dual-rank PC3-12800 (DDR3-1600) RDIMMs operating at up to 1600 MT/s
• Single- and dual-rank PC3-14900 (DDR3-1866) RDIMMs operating at up to 1866 MT/s
• Single- and dual-rank PC3-10600 (DDR3-1333) UDIMMs operating at up to 1333 MT/s
• Quad-rank PC3L-10600 (DDR3-1333) LRDIMMs, operating as dual-rank DIMMs, at up to 1333 MT/s
• Quad-rank PC3L-14900 (DDR3-1866) LRDIMMs operating as dual-rank DIMMs at up to 1866 MT/s

For the latest memory configuration information, see the product QuickSpecs on the HP Product Bulletin website.