Thermal And Acoustics; Table 20. Power Supply Efficiency; Figure 9. 750W Power Supply Unit - Dell PowerEdge T620 Technical Manual

Figure 9 shows a 750W power supply extended from the T620 chassis.
The PowerEdge T620 supports up to two AC or DC power supplies with 1 + 1 redundancy,
auto-sensing and auto-switching capability.
Dell PSUs have achieved Platinum and Titanium efficiency levels as shown in Table 20.
Form factor Output
495W AC
750W AC
Redundant 86mm 750W AC
1100W AC
1100W DC

Thermal and acoustics

Optimized thermal management makes the PowerEdge T620 cool and quiet. Benefiting from smart
cooling fan speed control, the T620 can keep both high performance and low acoustics across a
wide range of ambient temperatures from 10°C to 35°C (50°F to 95°F) and to extended ambient
temperature ranges (see Table 30). A typically configured T620 is quiet enough for an office
environment, and a minimally configured T620 is quiet enough for a library.
Thermal design
The thermal design of the PowerEdge T620 reflects the following:

Multiple sensors are monitored for thermal feedback control: The PowerEdge T620
dynamically controls system cooling fan speed based on responses from all component
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PowerEdge T620 Technical Guide
Figure 9. 750W power supply unit
Table 20. Power supply efficiency
Class
Platinum
Platinum
Titanium
Platinum
N/A
Efficiency targets by load
10% 20%
82.0% 90.0%
82.0% 90.0%
90.0% 94.0%
89.0% 93.0%
80.0% 88.0%
50% 100%
94.0% 91.0%
94.0% 91.0%
96.0% 91.0%
94.5% 92.0%
91.0% 88.0%