Dell UltraSharp 27 4K Monitor (U2718Q) vs Dell UltraSharp 40 Curved Thunderbolt Hub (U4025QW)

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UltraSharp 27 4K Monitor (U2718Q) compared with UltraSharp 40 Curved Thunderbolt Hub (U4025QW)

	DellUltraSharp 27 4K Monitor (U2718Q)	DellUltraSharp 40 Curved Thunderbolt Hub (U4025QW)
Overview
Released
Released	2017	January 2024
Display
Screen size
Screen size	27″	39.7″
Resolution
Resolution	3840 × 2160 (4K)	5120 × 2160 (5K2K) (better)
Sharpness
Sharpness	163 pixels per inch (better)	140 pixels per inch
Panel
Panel	IPS	IPS (IPS Black)
Refresh rate
Refresh rate	60 Hz	120 Hz (better)
Response time (grey to grey)
Response time (grey to grey)	5 ms	5 ms
Brightness (typical)
Brightness (typical)	350 nits	450 nits (better)
HDR peak brightness
HDR peak brightness	–	600 nits
HDR certification
HDR certification	–	DisplayHDR 600
HDR formats
HDR formats	HDR10 through HDMI (Dell HDR)	–
Contrast ratio
Contrast ratio	1,300:1	2,000:1
Colour range
Colour range	99.9% sRGB, 99.9% Rec. 709, 80.7% DCI-P3	99% DCI-P3, 99% Display P3, 100% sRGB
DCI-P3 coverage
DCI-P3 coverage	80.7%	99% (better)
Colour accuracy (Delta E)
Colour accuracy (Delta E)	Below 2	Below 2
Screen finish
Screen finish	Matte	Matte
Shape
Shape	Flat	Curved (2500R)
Adaptive sync
Adaptive sync	–	HDMI VRR
Colour depth
Colour depth	1.07 billion colours.	1.07 billion colours (8-bit + A-FRC)
sRGB coverage
sRGB coverage	99.9%	100%
Colour accuracy
Colour accuracy	Factory calibrated to average Delta E < 2.	Delta E < 2 (average) (DCI-P3, Display P3, sRGB, BT.709); factory calibration report in the box
Colour modes
Colour modes	99.9% sRGB and Rec. 709; 80.7% DCI-P3.	–
HDR detail
HDR detail	Dell HDR accepts HDR10 from a compatible HDMI source. Dell cautions that its implementation differs from TV HDR standards; independent reviewers found the effect limited.	600 cd/m² HDR peak; HDR static metadata over HDMI
Response time detail
Response time detail	5 ms grey-to-grey in Fast mode; 8 ms in Normal mode.	5 ms (Fast), 8 ms (Normal)
Variable refresh range
Variable refresh range	–	48–120 Hz (vertical scan range)
Viewing angles
Viewing angles	178° horizontal and vertical (typical).	178° horizontal, 178° vertical (typical)
Pixel pitch
Pixel pitch	0.1554 × 0.1554 mm.	0.1815 mm x 0.1815 mm
Eye care
Eye care	Flicker-free screen and ComfortView low-blue-light mode, TÜV certified according to Dell.	ComfortView Plus hardware low blue light; TÜV Rheinland Eye Comfort 3.0 (5 star); ambient light sensor; flicker-free
Connections
Video inputs
Video inputs	HDMI 2.0, 2 × DisplayPort 1.2	HDMI 2.1, DisplayPort 1.4, Thunderbolt 4
USB-C charging
USB-C charging	None	Up to 140 W (better)
USB ports
USB ports	4 × USB-A	2 × USB-C, 5 × USB-A, Thunderbolt 4
KVM switch
KVM switch	–	Yes
Ethernet
Ethernet	–	Yes
Speakers
Speakers	No	Yes
HDMI detail
HDMI detail	One HDMI 2.0 input; the independent HEXUS test found HDR10 input was limited to HDMI.	1 x HDMI, up to 5120 x 2160 at 120 Hz FRL with HDR static metadata and VRR as specified in HDMI 2.1
DisplayPort detail
DisplayPort detail	One DisplayPort 1.2 input and one Mini DisplayPort 1.2 input.	1 x DisplayPort 1.4 (HDCP 2.3), up to 5120 x 2160 at 120 Hz with HDR and DSC; internal MST (Screen Partition) over DisplayPort and Thunderbolt 4
USB-C detail
USB-C detail	–	Thunderbolt 4 upstream (DisplayPort 1.4 Alt Mode, USB 10Gbps, Power Delivery up to 140 W EPR); USB-C 10Gbps upstream (data only); 2 x USB-C 10Gbps downstream quick-access ports (15 W)
Daisy chaining
Daisy chaining	–	Thunderbolt 4 downstream port (video and data, 15 W)
USB hub detail
USB hub detail	Four downstream USB 3.0 Type-A ports and one upstream USB 3.0 Type-B port; two downstream ports support BC 1.2 charging at up to 2 A.	4 x USB-A 10Gbps rear; quick access ports with 1 x USB-A 10Gbps (BC 1.2) and 2 x USB-C 10Gbps (15 W)
Picture by picture
Picture by picture	–	Picture by Picture and Picture in Picture, with KVM switching
Audio out
Audio out	Audio line out for external speakers; Dell says it does not support headphones.	3.5 mm audio line out
Speaker detail
Speaker detail	–	2 x 9 W
Design
Stand adjusts
Stand adjusts	Height, tilt, swivel, pivot (better)	Height, tilt, swivel
VESA mount
VESA mount	Yes	Yes
Weight with stand
Weight with stand	6.55 kg	12.22 kg
Height adjustment
Height adjustment	130 mm.	150 mm
Tilt
Tilt	-5° to 21°.	-5° to 21°
Swivel
Swivel	-45° to 45°.	-30° to 30°
Pivot
Pivot	-90° to 90°.	–
VESA pattern
VESA pattern	100 × 100 mm.	100 x 100 mm
Size with stand
Size with stand	611.3 × 200.3 × 410.2–540.2 mm (width × depth × height).	946.62 x 252.80 x 472.32–622.32 mm (W x D x H)
Size without stand
Size without stand	–	946.62 x 108.04 x 419.14 mm (W x D x H)
Weight without stand
Weight without stand	3.70 kg.	8.35 kg
Power and support
Power use
Power use	30 W typical; less than 0.3 W in standby or sleep.	39.5 W on mode, 0.4 W standby, 1.8 W networked standby, 0.3 W off, 380 W maximum
Energy class
Energy class	–	F
Power supply
Power supply	100–240 V AC, 50/60 Hz.	100–240 VAC, 50/60 Hz, 4.2 A (typical)
Software
Software	Dell Display Manager with Easy Arrange.	Dell Display and Peripheral Manager (Easy Arrange)
Certifications
Certifications	–	ENERGY STAR, TCO Certified Edge, TÜV Rheinland Eye Comfort 3.0 (5 star)
Warranty
Warranty	Three years of Advanced Exchange Service and limited hardware warranty in Dell's product sheet; regional terms may differ.	3 years limited hardware (UK)
In the box
In the box	Stand, DisplayPort cable, USB 3.0 upstream cable, power cable, factory calibration report and documentation. Dell's product sheet does not list an HDMI cable.	Stand, power cable, DisplayPort 1.4 cable (1.8 m), HDMI 2.1 cable (1.8 m), Thunderbolt 4 active cable (1.5 m), USB-A to USB-C cable (1 m), factory calibration report