Dell UltraSharp U2421HE User Manual page 16

Power Management Modes
If you have VESA's DPM-compliant video card or software installed in your PC, the monitor
can automatically reduce its power consumption when not in use. This is referred to as
power save mode*. If the computer detects input from the keyboard, mouse, or other input
devices, the monitor automatically resumes functioning. The following table shows the
power consumption and signaling of this automatic power saving feature.
U2421HE
VESA Horizontal
Modes Sync
Normal Active
operation
Active-off Inactive
mode
Switch off -
Power Consumption P
Total Energy Consumption (TEC)
U2721DE
VESA Horizontal
Modes Sync
Normal Active
operation
Active-off Inactive
mode
Switch off -
Power Consumption P
Total Energy Consumption (TEC)
16 | About Your Monitor
Vertical Video Power Indicator
Sync
Active Active White
Inactive Off
- -
12.87 W
on
43.56 kWh
Vertical Video Power Indicator
Sync
Active Active White
Inactive Off
- -
19.9 W
on
64.3 kWh
White
(Glowing)
Off
White
(Glowing)
Off
Power Consumption
140 W (maximum)**
17.5 W (typical)
Less than 0.3 W
Less than 0.3 W
Power Consumption
160 W (maximum)**
33.2 W (typical)
Less than 0.3 W
Less than 0.3 W