Dell UltraSharp 40 Curved Thunderbolt Hub (U4025QW) vs LG UltraGear evo GX9 (39GX950B)

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UltraSharp 40 Curved Thunderbolt Hub (U4025QW) compared with UltraGear evo GX9 (39GX950B)

	DellUltraSharp 40 Curved Thunderbolt Hub (U4025QW)	LGUltraGear evo GX9 (39GX950B)
Overview
Released
Released	January 2024	June 2026
Display
Screen size
Screen size	39.7″	38.9″
Resolution
Resolution	5120 × 2160 (5K2K)	5120 × 2160 (5K2K)
Sharpness
Sharpness	140 pixels per inch	143 pixels per inch (better)
Panel
Panel	IPS (IPS Black)	OLED (4th-gen Primary RGB Tandem WOLED; Dual mode: 2560 x 1080 at 330 Hz)
Refresh rate
Refresh rate	120 Hz	165 Hz (better)
Response time (grey to grey)
Response time (grey to grey)	5 ms	0.03 ms (better)
Brightness (typical)
Brightness (typical)	450 nits (better)	335 nits
HDR peak brightness
HDR peak brightness	600 nits	1,500 nits (better)
HDR certification
HDR certification	DisplayHDR 600	DisplayHDR True Black 500
HDR formats
HDR formats	–	HDR10
Contrast ratio
Contrast ratio	2,000:1	1,850,000:1
Colour range
Colour range	99% DCI-P3, 99% Display P3, 100% sRGB	99.5% DCI-P3
DCI-P3 coverage
DCI-P3 coverage	99%	99.5% (better)
Colour accuracy (Delta E)
Colour accuracy (Delta E)	Below 2	–
Screen finish
Screen finish	Matte	Matte
Shape
Shape	Curved (2500R)	Curved (1500R)
Adaptive sync
Adaptive sync	HDMI VRR	G-Sync Compatible, FreeSync Premium Pro
Colour depth
Colour depth	1.07 billion colours (8-bit + A-FRC)	1.07B colours
sRGB coverage
sRGB coverage	100%	–
Colour accuracy
Colour accuracy	Delta E < 2 (average) (DCI-P3, Display P3, sRGB, BT.709); factory calibration report in the box	–
HDR detail
HDR detail	600 cd/m² HDR peak; HDR static metadata over HDMI	–
Response time detail
Response time detail	5 ms (Fast), 8 ms (Normal)	–
Variable refresh range
Variable refresh range	48–120 Hz (vertical scan range)	–
Viewing angles
Viewing angles	178° horizontal, 178° vertical (typical)	178° horizontal, 178° vertical (CR ≥ 10)
Pixel pitch
Pixel pitch	0.1815 mm x 0.1815 mm	0.1776 × 0.1776 mm
Eye care
Eye care	ComfortView Plus hardware low blue light; TÜV Rheinland Eye Comfort 3.0 (5 star); ambient light sensor; flicker-free	Reader Mode, Color Weakness mode; panel UL-verified Flicker-Free and Discomfort Glare Free, Eyesafe 3.0
Burn-in protection
Burn-in protection	–	OLED Care, including an OLED Care screen saver
Calibration
Calibration	–	Factory calibrated; hardware calibration ready (LG Calibration Studio)
Connections
Video inputs
Video inputs	HDMI 2.1, DisplayPort 1.4, Thunderbolt 4	2 × HDMI 2.1, DisplayPort 2.1 UHBR20, USB-C
USB-C charging
USB-C charging	Up to 140 W (better)	Up to 90 W
USB ports
USB ports	2 × USB-C, 5 × USB-A, Thunderbolt 4	2 × USB-A
KVM switch
KVM switch	Yes	No
Ethernet
Ethernet	Yes	No
Speakers
Speakers	Yes	Yes
HDMI detail
HDMI detail	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	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)	Upstream; display input (DisplayPort Alt Mode), data and up to 90 W charging over one cable
Daisy chaining
Daisy chaining	Thunderbolt 4 downstream port (video and data, 15 W)	–
USB hub detail
USB hub detail	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)	2 × USB-A (USB 3.2 Gen 2), upstream via USB-C
Picture by picture
Picture by picture	Picture by Picture and Picture in Picture, with KVM switching	PBP (2 inputs), PIP
Audio out
Audio out	3.5 mm audio line out	4-pole headphone out (sound + mic)
Speaker detail
Speaker detail	2 x 9 W	2 × 7 W, AI Sound
Design
Stand adjusts
Stand adjusts	Height, tilt, swivel	Height, tilt, swivel
VESA mount
VESA mount	Yes	Yes
Weight with stand
Weight with stand	12.22 kg	10.7 kg
Height adjustment
Height adjustment	150 mm	–
Tilt
Tilt	-5° to 21°	–
Swivel
Swivel	-30° to 30°	–
VESA pattern
VESA pattern	100 x 100 mm	100 × 100 mm
Size with stand
Size with stand	946.62 x 252.80 x 472.32–622.32 mm (W x D x H)	921.4 × 605.4 × 322.8 mm (raised), 921.4 × 495.4 × 322.8 mm (lowered)
Size without stand
Size without stand	946.62 x 108.04 x 419.14 mm (W x D x H)	921.4 × 405.0 × 118.7 mm
Weight without stand
Weight without stand	8.35 kg	6.8 kg
Colours
Colours	–	Black
Power and support
Power use
Power use	39.5 W on mode, 0.4 W standby, 1.8 W networked standby, 0.3 W off, 380 W maximum	Less than 0.5 W (sleep)
Energy class
Energy class	F	–
Power supply
Power supply	100–240 VAC, 50/60 Hz, 4.2 A (typical)	External adapter, 100–240 V AC, 50/60 Hz
Software
Software	Dell Display and Peripheral Manager (Easy Arrange)	LG Calibration Studio (True Color Pro), Dual Controller
Certifications
Certifications	ENERGY STAR, TCO Certified Edge, TÜV Rheinland Eye Comfort 3.0 (5 star)	UL-verified Perfect Black, Perfect Colour and Perfect Reproduction
Warranty
Warranty	3 years limited hardware (UK)	–
In the box
In the box	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	–