Memory Rules and Supported Configurations

The Sun Ultra 27 workstation contains six DIMM slots divided into three channels (two slots per channel). The slots are colored coded—three blue and three black—and are numbered from DIMM 0 (closest to the CPU) to DIMM 5 (farthest from the CPU).

Memory Population Rules

Populate the slots according to the following rules:

• The workstation requires DDR3-1066/1333, unbuffered, ECC DIMMs.

• Supported sizes and frequencies: 1 GB and 2 GB 1066 MHz and 1333 MHz DIMMs (see the Sun Ultra 27 Workstation Workstation Product Notes for supported hardware and other workstation-related issues.)

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  Note –

  The DDR3 interface can support up to six DDR3–1066 DIMMs running at full speed.

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• DIMMs must be installed in groups of three (except the single DIMM configuration).

• The single DIMM configuration is supported for 1 GB DIMM only.

• Populate DIMMs according to the supported memory configurations listed in the section, Supported Memory Configurations.

Supported Memory Configurations

The following is a list of supported memory configurations for the Sun Ultra 27 Workstation. Only these configurations in combination the supported DIMMs are valid:

• One 1 GB DIMM in slot 1 (1 GB DIMM only)

• DIMMs in slots 1, 3, 5 only (black-colored slots only)

• All DIMM slots populated