Memory Rules and Supported Configurations

The workstation contains six DIMM slots divided into three channels (two slots per channel). The slots are color-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 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).

• Populate DIMMs according to the supported memory configurations listed in the next section.

Supported Memory Configurations

The following is a list of supported memory configurations for the Sun Ultra 27 workstation workstation. Only these configurations 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