Server User Manual

3-4 Sun Netra CP3250 Blade Server User’s Guide • April 2009
■ Enterprise South Bridge Interface (ESI) to ICH9 device
■ Maximum memory bandwidth using DDR2-667 is 10.6GB per slot for two DDR2
channels
3.4 Memory
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.