HP ProLiant DL580 Gen8 Server - Manual (Page 47)

Hardware options installation 47
Memory options
IMPORTANT: This server does not support mixing LRDIMMs, RDIMMs, or UDIMMs. Attempting
to mix any combination of these DIMMs can cause the server to halt during BIOS initialization.
The memory subsystem in this server supports LRDIMMs and RDIMMs:
• UDIMMs are not supported in this server.
• 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.
All types are referred to as DIMMs when the information applies to all types. When specified as LRDIMM or
RDIMM, 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 PC3L-12800R-11 (DDR3-1600) RDIMMs operating at up to 1333 MT/s at 1.35v
• Single and dual rank PC3-14900R-13 (DDR3-1866) RDIMMs operating at up to 1333 MT/s at 1.5v
• Quad rank PC3-14900L-13 (DDR3-1866) RDIMMs operating at up to 1600 MT/s at 1.5v
Speed, voltage, and capacity
DIMM type DIMM rank DIMM capacity Maximum speed
(MT/s) Voltage
RDIMM Single-rank 4 GB 1333 LV
RDIMM
Single-rank 4 GB 1333 STD
RDIMM Dual-rank 8 GB 1333 LV
RDIMM Single-rank 8 GB 1333 STD
RDIMM Dual-rank 16 GB 1333 STD
RDIMM Dual-rank 16 GB 1333 LV
LRDIMM Quad-rank 32 GB 1600 STD
Depending on the number of DIMMs installed, whether LRDIMMs or RDIMMs are installed, and whether the
DIMM is operating and standard or low voltage, the memory clock speed can be reduced to 1333 or 1066
MT/s.
Populated DIMM speed (MT/s)
DIMM type DIMM rank 1 DIMM per channel 2 DIMMs per channel 3 DIMMs per channel
RDIMM Single-rank (4
GB)*
1333 1333 —
RDIMM Single-rank (4
GB)**
1333 1333 1066
RDIMM Single-rank (8
GB)*
1333 1066 —
RDIMM Single rank (8
GB)**
1333 1333 1066
RDIMM
Dual-rank (16
GB)* 1333 1066 —
RDIMM Dual-rank (16
GB)** 1333 1333 1066