Memory options

The memory subsystem in this server can support RDIMMs or UDIMMs. Both types are referred to as DIMMs when the information applies to both types. When specified as RDIMM or UDIMM, 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:

Depending on the processor model, the number of DIMMs installed, and whether UDIMMs or RDIMMs are installed, the memory clock speed may be reduced to 1066 or 800 MHz.

Memory subsystem architecture

The memory subsystem in this server is divided into channels. The processor supports two channels, and each channel supports three DIMM slots, as shown in the following table.

This server supports both Registered PC3 DIMMs (RDIMMs) and Unbuffered DIMMs (UDIMMs).

DIMM Slots in this server are identified by number and by letter. Letters identify the slots to populate for specific AMP modes. Slot numbers are reported by ROM messages during boot and for error reporting.

Single, dual and quad rank DIMMs

To understand and configure memory protection modes properly, an understanding of single, dual, and quad-rank DIMMs is helpful. Some DIMM configuration requirements are based on these classifications.

A single-rank DIMM has one set of memory chips that is accessed while writing to or reading from the memory. A dual-rank DIMM is similar to having two single-rank DIMMs on the same module, with only one rank accessible at a time. A quad-rank DIMM is, effectively, two dual-rank DIMMs on the same module. Only one rank is accessible at a time. The server memory control subsystem selects the proper rank within the DIMM when writing to or reading from the DIMM.

Dual-Rank and quad-rank DIMMs provide the greatest capacity with the existing memory technology. For example, if current DRAM technology supports 2GB single-rank DIMMs, a dual-rank DIMM would be 4GB, and a quad-rank DIMM would be 8GB.

DIMM Identification

The memory subsystem may be populated with either RDIMMs or UDIMMs, but mixing the two types is not supported. To determine DIMM characteristics, use the label attached to the DIMM and the following illustration and table.

General DIMM slot population guidelines

Observe the following guidelines:

Observe the following guidelines when installing DIMMs:

Populate the DIMM slots in the following sequence:

Standard memory configurations

SATA Models: 4GB of PC3-10600E DDR3 UDIMM running at 1333 MHz with ECC capabilities memory installed.

SAS Models: 4GB of PC3-10600R RDIMM running at 1333 MHz.

Standard memory plus optional memory

Up to 16GB memory is available with the optional installation of 4 x 4GB PC3-10600E UDIMM ECC DDR3 SDRAM DIMM memory kits, operating at 1333 MHz when fully populated at 2 DIMMs per Channel in 4 slots.

Up to 12GB memory is available with the optional installation of 6 x 2GB PC3-10600R RDIMM DDR3 SDRAM DIMM memory kits, operating at 1333 MHz when fully populated at 3 DIMMs per Channel in 6 slots.

Up to 16GB memory is available with the optional installation of 4 x 4GB PC3-8500R RDIMM DDR3 DIMM memory kits, operating at 1066 MHz when fully populated at 2 DIMMs per Channel in 4 slots.

Click here to see the memory configuration information provided in the ProLiant DL120 G6 Server QuickSpecs.

Link to product related documents

Click here to view the list of product related documents .