Dell UltraSharp U2421HE User Manual page 12

Preset Display Modes
U2421HE
Display Mode
720 x 400
VESA, 640 x 480
VESA, 640 x 480
VESA, 800 x 600
VESA, 800 x 600
VESA, 1024 x 768
VESA, 1024 x 768
VESA, 1152 x 864
VESA, 1280 x 1024
VESA, 1280 x 1024
VESA, 1600 x 900
VESA, 1920 x 1080
U2721DE
Display Mode
720 x 400
VESA, 640 x 480
VESA, 640 x 480
VESA, 800 x 600
VESA, 800 x 600
VESA, 1024 x 768
VESA, 1024 x 768
VESA, 1152 x 864
VESA, 1280 x 1024
VESA, 1280 x 1024
VESA, 1600 x 1200
VESA, 1920 x 1080
VESA, 2048 x 1080
CVR, 2560 x 1440
12 | About Your Monitor
Horizontal Vertical
Frequency Frequency
(kHz) (Hz)
31.5 70.0
31.5 60.0
37.5 75.0
37.9 60.3
46.9 75.0
48.4 60.0
60.0 75.0
67.5 75.0
64.0 60.0
80.0 75.0
60.0 60.0
67.5 60.0
Horizontal Vertical
Frequency Frequency
(kHz) (Hz)
31.5 70.0
31.5 60.0
37.5 75.0
37.9 60.3
46.9 75.0
48.4 60.0
60.0 75.0
67.5 75.0
64.0 60.0
80.0 75.0
75.0 60.0
67.5 60.0
66.58 60.0
88.8 60.0
Pixel Clock Sync Polarity
(MHz) (Horizontal/
Vertical)
28.3 -/+
25.2 -/-
31.5 -/-
40.0 +/+
49.5 +/+
65.0 -/-
78.8 +/+
108.0 +/+
108.0 +/+
135.0 +/+
108.0 -/+
148.5 +/+
Pixel Clock Sync Polarity
(MHz) (Horizontal/
Vertical)
28.3 -/+
25.2 -/-
31.5 -/-
40.0 +/+
49.5 +/+
65.0 -/-
78.8 +/+
108.0 +/+
108.0 +/+
135.0 +/+
162.0 +/+
148.5 +/+
147.16 +/-
241.5 +/-