Thermal; Acoustics; Table 8. 1100W Psu Efficiency - Dell PowerEdge VRTX Technical Manual

Attribute
Max output current
Input voltage range
Iin (100–240V AC) for rating on safety label
Initial in-rush current
Secondary in-rush current
Power supply efficiency at 115VAC
Power supply efficiency at 230VAC

Thermal

Four blower modules with dual blowers are located on the back of the VRTX chassis. Six fans are
located between the SAS backplane and expander cards and the system planar components. You
can check fan status using the control panel LCD or the systems management interfaces.
In chassis standby mode, all components are unpowered except the CMC, the LCD control panel,
and two fans for cooling the CMC components. For chassis standby mode, the system needs to run
one or two fans at low RPM to ensure that the CMCs are properly cooled.

Acoustics

PowerEdge VRTX has been consciously designed with an open office layout in mind, including its
acoustical design. Acoustic intensity has been minimized as a function of delivered airflow, and
tones (buzzes, hums, whistles) have been removed. The result is a smooth sound generally masked
by that of normal office air conditioning or conference room conversations. Certain configurations
and utilizations are quieter than others — if your environment is acoustically sensitive, Dell can help
you choose the right configuration.
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PowerEdge VRTX Technical Guide
Table 8. 1100W PSU efficiency
10% load
87%
89%
Value
108.0 Amps
90–264V AC, 47–63Hz
12.0 Amps–6.5 Amps
55 Amps (peak)
25 Amps (peak)
20% load 50% load
91% 92.5%
93% 94.5%
100% load
90%
92%