Energy Star Compliance; Thermal - Dell PowerEdge M915 Technical Manual

Dell
Storage
Altitude
Operating
Storage
Airborne contaminant level
Class G1 or lower as defined by ISA-S71.04-1985 (G1 maximum corrosive contaminant levels
measured at ≤ 50% relative humidity)

5.4 ENERGY STAR Compliance

®
ENERGY STAR qualified configurations can be accessed from the
landing page on Dell.com.

5.5 Thermal

The Dell™ PowerEdge™ M915 is the first blade to support ≥130W processors in a 4-socket
configuration. Larger heat sinks provide increased cooling capability, which enables 4-socket 140W
configurations without restrictions on external ambient temperature.
The M915 thermal solution includes the following features:

Optimized airflow impedance for individual blade and chassis-level airflow balancing

Custom top cover air baffling prevents DIMM airflow bypass to balance airflow and maintain
proper DIMM cooling

Custom-designed heat sinks maintain processor and chipset temperatures within thermal
design targets

Highly optimized fan control algorithm:
o Base fan speeds are a function of hardware configuration and ambient temperature to
minimize airflow for a given environment
o PID fan control algorithms are used for processors, DIMMs, and NDC I/O thermal
sensors to maintain appropriate thermal margin while minimizing component over-
cooling
o NDC I/O sensor algorithm allows for lower fan speeds by sensing the air temperature
near the exhaust of the blade while maintaining proper airflow and cooling for the
mezzanine cards
o The highest fan-speed request from the above algorithms is used to set the
appropriate fan speed for the blade
o The ambient and hardware configuration sets the minimum fan speed—other
algorithms increase fan speed as needed to maintain proper cooling
PowerEdge M915 Technical Guide
Half sine shock on all six sides of 71G +/- 5% with a pulse duration
of 2ms +/- 10%
-15.2m to 3048m (-50 to 10,000ft)
Note: For altitudes above 2950ft, the maximum temperature is
derated 1°F/550ft
-16 to 10,600m (-50 to 35,000ft)
ENERGY STAR Compliance results
21