Dell UltraSharp 27 4K USB-C Monitor (U2720Q) vs LG UltraFine 27US550

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UltraSharp 27 4K USB-C Monitor (U2720Q) compared with UltraFine 27US550

	DellUltraSharp 27 4K USB-C Monitor (U2720Q)	LGUltraFine 27US550
Overview
Released
Released	January 2020	November 2024
Display
Screen size
Screen size	27″	27″
Resolution
Resolution	3840 × 2160 (4K)	3840 × 2160 (4K)
Sharpness
Sharpness	163 pixels per inch	163 pixels per inch
Panel
Panel	IPS	IPS
Refresh rate
Refresh rate	60 Hz	60 Hz
Response time (grey to grey)
Response time (grey to grey)	5 ms	5 ms
Brightness (typical)
Brightness (typical)	350 nits (better)	300 nits
HDR certification
HDR certification	DisplayHDR 400	–
HDR formats
HDR formats	HDR10	HDR10
Contrast ratio
Contrast ratio	1,300:1	1,000:1
Colour range
Colour range	99% sRGB, 99% Rec. 709, 95% DCI-P3	90% DCI-P3 (CIE 1976)
DCI-P3 coverage
DCI-P3 coverage	95% (better)	90%
Colour accuracy (Delta E)
Colour accuracy (Delta E)	Below 2	–
Screen finish
Screen finish	Matte	–
Shape
Shape	Flat	Flat
Colour depth
Colour depth	1.07 billion colours.	10-bit (8-bit + FRC), 1.07 billion colours
sRGB coverage
sRGB coverage	99%	–
Colour accuracy
Colour accuracy	Factory calibrated to average Delta E < 2 in sRGB mode.	–
Colour modes
Colour modes	sRGB and DCI-P3 modes listed in Dell's user guide.	–
HDR detail
HDR detail	VESA DisplayHDR 400; Dell's user guide describes HDR playback over HDMI 2.0a, DisplayPort 1.4 and USB-C DisplayPort 1.4 from compatible sources.	HDR10, HDR Effect
Response time detail
Response time detail	5 ms grey-to-grey in Fast mode; 8 ms in Normal mode.	5 ms GtG (Faster mode)
Viewing angles
Viewing angles	178° horizontal and vertical (typical).	178° horizontal, 178° vertical (CR ≥ 10)
Pixel pitch
Pixel pitch	0.1554 × 0.1554 mm.	0.1554 x 0.1554 mm
Eye care
Eye care	Flicker-free backlight and ComfortView low-blue-light mode.	Flicker Safe, Reader Mode, Color Weakness mode
Connections
Video inputs
Video inputs	HDMI 2.0, DisplayPort 1.4, USB-C	2 × HDMI 2.0, DisplayPort 1.4
USB-C charging
USB-C charging	Up to 90 W (better)	None
Ethernet
Ethernet	–	No
USB ports
USB ports	3 × USB-A, USB-C	–
Speakers
Speakers	No	No
HDMI detail
HDMI detail	One HDMI 2.0 input.	2 x HDMI 2.0
DisplayPort detail
DisplayPort detail	One DisplayPort 1.4 input.	1 x DisplayPort 1.4
USB-C detail
USB-C detail	USB-C upstream with DisplayPort 1.4 Alt Mode, USB 3.0 data and up to 90 W Power Delivery. Dell's user guide offers High Resolution and High Data Speed prioritisation modes for USB-C hosts.	–
USB hub detail
USB hub detail	Three downstream USB 3.0 Type-A ports, one with BC 1.2 charging up to 2 A; one downstream USB-C port charges at up to 3 A.	–
Audio out
Audio out	3.5 mm audio line out; Dell says it does not support headphones.	3-pole headphone out (sound only)
Design
Stand adjusts
Stand adjusts	Height, tilt, swivel, pivot	Height, tilt, swivel, pivot
VESA mount
VESA mount	Yes	Yes
Weight with stand
Weight with stand	6.6 kg	6.8 kg
Height adjustment
Height adjustment	130 mm.	–
Tilt
Tilt	-5° to 21°.	–
Swivel
Swivel	-45° to 45°.	–
Pivot
Pivot	-90° to 90°.	–
VESA pattern
VESA pattern	100 × 100 mm.	100 x 100 mm
Size with stand
Size with stand	611.3 × 185.0 × 395.2–525.2 mm (width × depth × height).	613.5 x 539.2 x 253.2 mm (W x H x D, raised)
Size without stand
Size without stand	611.3 × 49.7 × 356.0 mm (width × depth × height).	613.5 x 363.5 x 45.4 mm (W x H x D)
Weight without stand
Weight without stand	4.4 kg.	4.2 kg
Colours
Colours	–	White
Controls
Controls	Front on-screen-display buttons and Dell Display Manager software.	–
Power and support
Power use
Power use	33 W typical and 200 W maximum in Dell's December 2019 brochure; its later user guide states 31.5 W on mode, 200 W maximum and 0.3 W standby under newer test rules.	25 W typical, 26 W maximum, less than 0.5 W sleep, less than 0.3 W DC off
Power supply
Power supply	100–240 V AC, 50/60 Hz.	External adapter, 100–240 V AC, 50/60 Hz; 19 V 2.1 A (40 W)
Software
Software	Dell Display Manager with Easy Arrange.	LG Switch, Dual Controller
Certifications
Certifications	ENERGY STAR and TCO Certified Displays; EPEAT registration varies by market.	–
Warranty
Warranty	Dell's brochure specifies three years of Advanced Exchange Service and limited hardware warranty; regional terms may differ.	–
In the box
In the box	Stand, power cable, DisplayPort cable, USB-C to USB-C cable, USB-C to USB-A cable, factory calibration report and documentation for U2720Q. The U2720QM package instead includes HDMI, according to Dell's user guide.	Power adapter, HDMI cable (white, 1.5 m)