Thermal And Acoustics; Table 17. Power Supply Efficiency; Figure 7. 350W Power Supply Unit - Dell PowerEdge R320 Technical Manual

Figure 7 shows a 350W power supply unit extended from the R320 chassis.
The PowerEdge R320 supports up to two AC with 1+1 redundancy, auto- sensing, and
auto- switching capability.
To support Intel turbo boost feature (default enabled in BIOS), system with 95W processors (8- core
or 6- core) and 350W cabled PSU may not be sufficient to support feature rich configurations. For
feature rich configurations, using a 350W or 550W hot- plug PSU is recommended in addition to
verifying energy efficiency configurations using the Dell Energy Smart Solution Advisor at
Dell.com/ESSA.
Dell PSUs have achieved Platinum efficiency levels as shown in Table 17.
Form factor Output
350W AC
Redundant
550W AC
Non-redundant 350W AC

Thermal and acoustics

Optimized thermal management makes the PowerEdge R320 cool and quiet. Benefiting from smart
cooling fan speed control, the R320 can keep both high performance and good 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 26). Operating environments for the R320 can vary from the data
center to general- use spaces. In a typical configuration, the R320 is suitable for an open office
environment.
Thermal design
The thermal design of the PowerEdge R320 reflects the following:
•
Multiple sensors are monitored for thermal feedback control: The PowerEdge R320
dynamically controls system cooling fan speed based on responses from component
temperature sensors, including processors, hard disk drives, DIMMs, storage cards, and the inlet
ambient temperature. Thermal control detects and responds to hardware configuration. Thermal
28 PowerEdge R320 Technical Guide
Figure 7. 350W power supply unit
Table 17. Power supply efficiency
Class
Platinum
Platinum
Bronze
Efficiency targets by load
10% 20%
82.0% 90.0%
82.0% 90.0%
N/A 85.0%
50% 100%
94.0% 91.0%
94.0% 91.0%
85.0% 85.0%