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Compare LG 34WL850 vs Dell UltraSharp U4021QW vs LG 40WP95C

Connectivity

Ports
2x HDMI 2.0, 1x DisplayPort 1.4, 1x 3.5 mm Audio Out, 1x Thunderbolt 3.0, 1x USB 2.0 (upstream), 2x USB 3.0 (downstream)
1x USB 3.2 (Type-C; downstream; 15W), 1x Ethernet RJ45 (Gigabit), 1x DisplayPort 1.4, 1x 3.5 mm Audio Out (line-out for speakers), 1x Thunderbolt 3.0 (Type-C; upstream; 90W; DP Alt Mode), 2x HDMI 2.0, 4x USB 3.2 (Type-A; Gen 1; downstream), 1x USB 3.2 ...
1x DisplayPort 1.4, 1x Thunderbolt 4.0 (in; Type-C; upstream; 96W; DP Alt Mode), 1x 3.5 mm Audio Out (line-out for speakers), 1x Thunderbolt 4.0 (out), 2x USB 3.0 (Type-A; downstream), 2x HDMI 2.0

Construction

Adjustment | Height
110 mm / 4.3307 in
120 mm / 4.7244 in
110 mm / 4.3307 in
Adjustment | Pivot
N/A
N/A
N/A
Adjustment | Swivel
N/A
-30° ~ 30°
-15° ~ 15°
Adjustment | Tilt
-5° ~ 15°
-5° ~ 21°
-5° ~ 20°
Camera
No
No
No
Colors
White
Black
White and Silver
Form Factor
Curved monitor
Curved monitor
Speakers
2x 7W
2x 9W
2x 10W
VESA Mount
100 x 100 mm
100 x 100 mm
100 x 100 mm

Dimensions

Bezels
88.45% screen-to-body ratio
91.75% screen-to-body ratio
Size | Depth
2.02 in / 51.2 mm w/o stand, 9.06 in / 230 mm w/ stand
9.76 in / 248 mm w/ stand
4.52 in / 114.8 mm w/o stand, 11.14 in / 283 mm w/ stand
Size | Height
14.56 in / 369.8 mm w/o stand, 18.14 in / 460.7 mm w/ stand
18.02 in / 457.8 mm w/ stand
16.5 in / 419.2 mm w/o stand, 19.87 in / 504.7 mm w/ stand
Size | Width
32.5 in / 825.6 mm
37.27 in / 946.6 mm
37.29 in / 947.2 mm
Weight
5.9 kg / 13 lbs w/o stand , 7.6 kg / 17 lbs w/ stand
9.5 kg / 21 lbs w/ stand
10.2 kg / 22 lbs w/o stand , 12.3 kg / 27 lbs w/ stand

Display

Aspect Ratio
21:9
21:9
21:9
Brightness
350 nits / 400 nits (peak)
300 nits
300 nits
Contrast Ratio
1000:1 (static)
1000:1 (static)
1000:1 (static)
Display Backlight
W-LED
W-LED
W-LED
Display Color Depth
10 bits (8 bits + FRC), 1073741824 colors
10 bits, 1073741824 colors
10 bits (8 bits + FRC), 1073741824 colors
Display Curvature
2500R
2500R
Display Diagonal
34" (34 in / 863.6 mm)
40"
40" (39.71 in / 1008.59 mm)
Display Type
AH-IPS, Anti-glare/Matte (3H), LG Display
IPS, Anti-glare/Matte (3H)
IPS, Anti-glare/Matte (3H)
Gamut
98% DCI-P3, 135% sRGB
98% DCI-P3, 100% sRGB
98% DCI-P3, 100% sRGB
Pixel Density
110 ppi
140 ppi
Pixel Pitch
0.231 mm
0.182 mm
Refresh Rate
56 Hz ~ 61 Hz
60 Hz
48 Hz ~ 72 Hz
Resolution
UW-QHD (3440x1440)
5K2K WUHD (5120x2160)
5K2K WUHD (5120x2160)
Response Time
5 ms (min)
5 ms (min) / 8 ms (avg)
5 ms (min)
Viewing Angle
178° H / 178° V
178° H / 178° V
178° H / 178° V

Function

HDR
HDR10, DisplayHDR 400
HDR10
Licenses
BSMI, CCC, CE, cTick, ENERGY STAR 7.0, ErP, FCC Class B, UL/cUL
TÜV Rheinland Eyesafe Display Certification, TÜV Rheinland Low Blue Light (Hardware Solution)
Operating Humidity
10 % ~ 80 %
10 % ~ 80 %
10 % ~ 80 %
Operating Temperature
0 °C ~ 40 °C , 32 °F ~ 104 °F
0 °C ~ 40 °C , 32 °F ~ 104 °F
0 °C ~ 40 °C , 32 °F ~ 104 °F
Variable Framerate
AMD FreeSync
Video
DDC/CI, Dynamic Action Sync, HDCP (High-bandwidth Digital Content Protection) 2.2, Picture-by-Picture, Nano IPS, Hardware calibration ready, 6-Axis Control, Screen Split 2.0, Black Stabilizer, Super Resolution+
KVM Switch, Low Blue Light, Picture-in-Picture, Picture-by-Picture, ComfortView Plus, Flicker-free technology
Wide Colour Gamut, Auto-Brightness with Ambient Light Sensor, Smart Energy Saving, Reader Mode, Super Resolution+, Black Stabilizer, KVM Switch, Dynamic Action Sync, Flicker-free technology, Picture-by-Picture, Live Colour Low Blue Light, True Colour P...

Performance

Energy Efficiency
B
Power Consumption
47.6 W (average) / 0.3 W (off)
51.5 W (average) / 240 W (max) / 0.5 W (sleep)
80 W (average) / 57 W (eco) / 1.2 W (sleep) / 0.3 W (off)

Production

Accessory
DisplayPort cable, HDMI cable
DisplayPort cable, HDMI cable, Thunderbolt 4 (USB-C) Active Cable, USB Type-A to Type-B cable
DisplayPort cable, HDMI cable, Thunderbolt 4 (USB-C) Active Cable
Debut
2019
2021
2021

Reviews

Neofiliac score
87%
77%
93%
Pros
  • HDR10, DisplayHDR 400
  • Ultra-wide form factor
  • Rich color reproduction
  • Stand with tilt and height adjustments
  • High 1000:1 contrast ratio
  • 10-bit display panel
  • Build-in speakers included
  • Ultra-wide form factor
  • 2500 curvature
  • Rich color reproduction
  • Stand with tilt, swivel, and height adjustments
  • High 1000:1 contrast ratio
  • 10-bit display panel
  • Build-in speakers included
  • Dual Thunderbolt 4
  • Ultra-wide form factor
  • 2500R curvature
  • Rich color reproduction
  • Stand with tilt, swivel, and height adjustments
  • High 1000:1 contrast ratio
  • 10-bit display panel
  • High 91.75 % screen-to-body ratio
  • Build-in speakers included
Cons
  • No publicized HDR support

Price

Offers (incl. referral links)
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