Memory options

The memory subsystem in this server can support RDIMMs or UDIMMs. Both types are referred to asDIMMs when the information applies to both types. When specified as RDIMM or UDIMM, theinformation 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 RDIMMsare installed, the memory clock speed may be reduced to 1066 or 800 MHz.

Following are memory options available from HPE:

Memory subsystem architecture

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

This multi-channel architecture provides enhanced performance in Advanced ECC mode. This architecturealso enables the Mirrored Memory and Lockstep memory modes. This server supports both RegisteredPC3 DIMMSs (RDIMMs) and Unbuffered DIMMs (UDIMMs).

DIMM slots in this server are identified by number and by letter. Letters identify the slots to populate forspecific 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-, andquad-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 thememory. A dual-rank DIMM is similar to having two single-rank DIMMs on the same module, with onlyone rank accessible at a time. A quad-rank DIMM is, effectively, two dual-rank DIMMs on the samemodule. Only one rank is accessible at a time. The server memory control subsystem selects the properrank within the DIMM when writing to or reading from the DIMM.

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

DIMM identification

The memory subsystem may be populated with either RDIMMs or UDIMMs, but mixing the two types is notsupported. To determine DIMM characteristics, use the label attached to the DIMM and the followingillustration and table.

Memory configurations

To optimize server blade availability, the server blade supports the following AMP modes:

Advanced Memory Protection options are configured in RBSU. If the requested AMP mode is notsupported by the installed DIMM configuration, the server boots in Advanced ECC mode.

RDIMM maximum memory configurations

The following table lists the maximum memory configuration possible with 8 GB RDIMMs.

UDIMM maximum memory configurations

The server blade supports a maximum of 12 GB with one processor and 24 GB with two processors using2 GB single- or dual-rank UDIMMs.

Advanced ECC memory configuration

Advanced ECC memory is the default memory protection mode for this server. Standard ECC cancorrect single-bit memory errors and detect multi-bit memory errors. When multi-bit errors are detectedusing Standard ECC, the error is signaled to the server and causes the server to halt.

Advanced ECC protects the server against some multi-bit memory errors. Advanced ECC cancorrect both single-bit memory errors and 4-bit memory errors if all failed bits are on the same DRAMdevice on the DIMM.

Advanced ECC provides additional protection over Standard ECC because it is possible to correct certainmemory errors that would otherwise be uncorrected and result in a server failure. The server provides notification that correctable error events have exceeded a pre-defined threshold rate.

Mirrored memory configuration

Mirroring provides protection against uncorrected memory errors that would otherwise result in serverblade downtime. Mirroring is performed at the channel level. Channels 1 and 2 are used; channel 3 isnot populated.

Data is written to both memory channels. Data is read from one of the two memory channels. If anuncorrectable error is detected in the active memory channel, data is retrieved from the mirror channel.This channel becomes the new active channel, and the system disables the channel with the failed DIMM.

Lockstep memory configuration

Lockstep mode provides protection against multi-bit memory errors that occur on the same DRAM device.Lockstep mode can correct any single DRAM device failure on x4 and x8 DIMM types. The DIMMs ineach channel must have identical HPE part numbers.

Lockstep mode uses channel 1 and channel 2. Channel 3 is not populated. Because channel 3 cannot bepopulated when using Lockstep mode, the maximum memory capacity is lower than Advanced ECCmode. Memory performance with Advanced ECC is also slightly higher.

General DIMM slot population guidelines

Observe the following guidelines for all AMP modes:

DIMM speeds are supported as indicated in the following table:

Link to the list of available documents

Click here to view a list of documents available for the HPE ProLiant DL360 G6 Server .

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Memory population guidelines

General memory population rules and guidelines

Intel Gen9 supported memory bandwidth for HPE ProLiant Gen9 Intel Xeon E5-2600v3 series processor family

Intel Gen9 supported memory bandwidth for HPE ProLiant Gen9 Intel Xeon E5-2600v4 series processor family

Memory speed by processor model

Standard and maximum memory capacity (Pre-configured models)

Link to product related documents

Click here to view the product related documents .