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).
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.)
The DDR3 interface can support up to six DDR3–1066 DIMMs running at full speed.
DIMMs must be installed in groups of three except the single DIMM configuration.
Three 1333 MHz DIMMs will run at 1333 MHz. Six 1333 MHz DIMMs will run at 1066 MHz.
Populate DIMMs according to the supported memory configurations listed in the following section.