Dell PowerEdge R220 - Thermal and Acoustics; Thermal Design; Power Supply Efficiency

Dell PowerEdge R220 Technical Guide 23
 250W AC, cabled, non-redundant
Figure 5 highlights the PowerEdge R220 power supply features.
PowerEdge R220 power supply
Dell PSUs have achieved Silver efficiency levels as shown in Table 13.
Power supply efficiency
Form factor
Output
Class
Minimum efficiency by load
10%
20%
50%
100%
Non-redundant
250W AC
Silver
N/A
85.0%
88.0%
85.0%
Thermal and acoustics
The PowerEdge R220 was designed with the goal to offer a class leading chassis depth all while
meeting the acoustical requirements for office environment.
Thermal design
The system’s PWM fan is controlled by the iDRAC. The thermal sensor on front control board senses
the ambient temperature and adjusts the fan speed accordingly. In a normal office environment the
fan spins slower, resulting in low acoustics. The fan RPM begins to ramp up with temperature to
satisfy cooling requirements at higher ambient temperatures, and different system configuration
(e.g. RAID card installation).
Optimized thermal management makes PowerEdge R220 cool and quiet with efficiency
improvements that save energy. Benefiting from a smart cooling thermal control algorithm, R220
Screw
250W power supply
ATX power supply
connector (2x12)
Power supply
connector (2x4)
Optical drive cable
SATA power cables (2)