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Memory options
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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 |
LRDIMM |
Quad-rank (32 GB)** |
1600 |
1600 |
1333 |
* Low voltage
** Standard voltage