Dell H810 Specifications download pdf (Page 38)

38 PowerEdge R720 and R720xd Technical Guide

Figure 13 shows a 750W power supply unit extended from an R720 system.

The PowerEdge R720 and R720xd support 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

Class

Efficiency targets by load

10%

20%

50%

100%

Redundant 86mm

495W AC

Platinum

82.0%

90.0%

94.0%

91.0%

750W AC

Titanium

90.0%

94.0%

96.0%

91.0%

750W AC

Platinum

82.0%

90.0%

94.0%

91.0%

1100W AC

Platinum

89.0%

93.0%

94.5%

92.0%

1100W DC

N/A

80.0%

88.0%

91.0%

88.0%

Thermal management of PowerEdge R720 and R720xd delivers high performance for the right

amount of cooling to components at the lowest fan speeds 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 31) . The benefits to you are lower fan power consumption (lower server system power and

data center power consumption) and greater acoustical versatility. The PowerEdge R720 is quiet

enough to be used in an office environment in typical and minimum configurations, and the R720xd

can also operate at a similar level in certain configurations.

The thermal design of the PowerEdge R720 and R720xd reflect the following:

 Optimized thermal design: The system layout is architected for optimum thermal design.

System component placement and layout are designed to provide maximum airflow coverage to

critical components with minimum expense of fan power.

 Comprehensive thermal management: The thermal control system regulates the fan speed

based on several different responses from all system-component temperature sensors, as well as

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