Sun Microsystems CP3250 manual Memory

■Enterprise South Bridge Interface (ESI) to ICH9 device

■Maximum memory bandwidth using DDR2-667 is 10.6GB per slot for two DDR2 channels

3.4Memory

The Sun Netra CP3250 blade server supports 4-Gbyte registered DDR2-667 memory, for up to 24 Gbytes memory total. When four DIMM slots or less are populated, the DIMM clock rate will be set to the max clock rate of up to 333 Mhz. When six DIMMs slots are populated, the DIMM clock rate will be set to a max clock rate of up to 267 Mhz.

For optimal performance, memory DIMMs must be installed in like pairs. The controller supports 1 bit per byte ECC and supports DDR2 667 registered DRR SDRAM modules. For more information on supported DIMM configurations, see Section 2.3.6.1, “DIMM Requirements” on page 2-19.

Additional features of the Sun Netra CP3250 blade server’s memory architecture include:

■Very low profile (0.72 inch) DIMM support

■Memory bandwidth up to 5.3 Gbyte/sec

■DDR2 power requirements 4.4W to 7.0W (1.8V)

Although single channel operation is defined by the Intel Memory Controller and will function, this configuration will not be qualified, tested, or supported on the Sun Netra CP3250 blade server.

The supported configuration is dual channel, which follows the DIMM loading order: Pair 0 (first) -> Pair 1 (second) -> Pair 2 (third).

DIMMs must be loaded by pairs in the order indicated. Install DIMMs in pairs of like memory types.

3-4Sun Netra CP3250 Blade Server User’s Guide • April 2009