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B-2 Sun Netra CP3250 Blade Server User’s Guide • April 2009
B.1 Form Factor
The Sun Netra CP3250 blade server is a standard 8-rack unit (8U) factor, single-slot
wide. It complies with the board mechanical dimensions that are required by the
PICMG 3.0 specification:
■ 322.25 mm x 280 mm (12.7 inches x 11.0 inches)
■ 30.48 mm (1.2 inch) front panel
B.2 Power and Thermal Metrics
Typical heat dissipation and power consumption metrics for a Sun Netra CP3250
blade server:
■ 225W maximum power (includes 25W to ARTM, 20W to AMC, and two Intel
Harpertown CPUs)
■ -5C - 55C for NEBS compliance
■ Power input: -36 VDC to -72 VDC (-48VDC nominal)
■ CPU temperature thresholds are set relative to the Thermal Control Circuit (TCC)
activation point of the Intel Harpertown CPUs. An offset of 95C is added to
provide an approximate CPU die temperature.
Two heatsinks are mounted to the Sun Netra CP3250 blade server. The heatsinks and
DIMMs are positioned on the blade server to provide adequate airflow (bottom to
top).
B.3 Connectors and Pinouts
B.3.1 Front Panel Connectors
The front panel has the following connectors, see FIGURE 1-1:
■ One 10/100/1000BASE-T Ethernet port (RJ-45)
■ One serial port (RJ-45)
■ Two USB ports