Request a product

Dell UltraSharp 40 Curved Thunderbolt Hub (U4025QW) vs Dell UltraSharp 52 Thunderbolt Hub (U5226KW)

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

DellUltraSharp 40 Curved Thunderbolt Hub (U4025QW)DellUltraSharp 52 Thunderbolt Hub (U5226KW)
Overview
ReleasedJanuary 2024January 2026
Display
Screen size39.7″51.5″
Resolution5120 × 2160 (5K2K)6144 × 2560
Sharpness140 pixels per inch129 pixels per inch
PanelIPS (IPS Black)IPS (IPS Black)
Refresh rate120 Hz120 Hz
Response time (grey to grey)5 ms5 ms
Brightness (typical)450 nits400 nits
HDR peak brightness600 nits–
HDR certificationDisplayHDR 600–
Contrast ratio2,000:12,000:1
Colour range99% DCI-P3, 99% Display P3, 100% sRGB99% DCI-P3, 99% Display P3, 100% BT.709
DCI-P3 coverage99%99%
Colour accuracy (Delta E)Below 2Below 1.5
Screen finishMatteMatte
ShapeCurved (2500R)Curved (4200R)
Adaptive syncHDMI VRRHDMI VRR
Colour depth1.07 billion colours (8-bit + A-FRC)1.07 billion colours (8-bit + FRC)
sRGB coverage100%100% (CIE 1931)
Colour accuracyDelta E < 2 (average) (DCI-P3, Display P3, sRGB, BT.709); factory calibration report in the boxDelta E < 1.5 (average) (sRGB, BT.709, DCI-P3, Display P3)
Colour modes–Standard, Movie, Game, Color Temp. (5,000K to 10,000K), Color Space (sRGB, BT.709, DCI-P3, Display P3), Custom Color
HDR detail600 cd/m² HDR peak; HDR static metadata over HDMI–
Response time detail5 ms (Fast), 8 ms (Normal)5 ms GTG (Fast mode), 8 ms GTG (Normal mode)
Variable refresh range48–120 Hz (vertical scan range)–
Viewing angles178° horizontal, 178° vertical (typical)178° horizontal, 178° vertical (typical)
Pixel pitch0.1815 mm x 0.1815 mm0.19644 mm x 0.19644 mm
Eye careComfortView Plus hardware low blue light; TÜV Rheinland Eye Comfort 3.0 (5 star); ambient light sensor; flicker-freeComfortView Plus (blue light ≤20%), TÜV Rheinland Eye Comfort 3.0 5-star, flicker-free, ambient light sensor with Auto Brightness and Auto Color Temp.
Connections
Video inputsHDMI 2.1, DisplayPort 1.4, Thunderbolt 42 × HDMI 2.1, 2 × DisplayPort 1.4, Thunderbolt 4
USB-C chargingUp to 140 WUp to 140 W
USB ports2 × USB-C, 5 × USB-A, Thunderbolt 42 × USB-C, 5 × USB-A
KVM switchYesYes
EthernetYesYes
SpeakersYesYes
HDMI detail1 x HDMI, up to 5120 x 2160 at 120 Hz FRL with HDR static metadata and VRR as specified in HDMI 2.12 x HDMI (HDCP 2.2), up to 6144 x 2560 at 120 Hz FRL with VRR as specified in HDMI 2.1; no ARC/eARC or ALLM
DisplayPort detail1 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 42 x DisplayPort 1.4 in (HDCP 2.2), up to 6144 x 2560 at 120 Hz with DSC
USB-C detailThunderbolt 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)Thunderbolt 4 upstream (40Gbps, DisplayPort 1.4 with DSC, Power Delivery up to 140 W EPR); 3 x USB-C 10Gbps upstream (data only); 2 x USB-C 10Gbps downstream with 27 W charging
Daisy chainingThunderbolt 4 downstream port (video and data, 15 W)–
USB hub detail4 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)4 x USB-A 10Gbps (rear); pop-out quick access module with 2 x USB-C 10Gbps (27 W) and 1 x USB-A 10Gbps with BC1.2 charging
Picture by picturePicture by Picture and Picture in Picture, with KVM switchingPicture by Picture with Screen Partition (internal MST) and Picture in Picture; USB KVM for up to four PCs, Auto KVM
Audio out3.5 mm audio line out–
Speaker detail2 x 9 W2 x 9 W
Design
Stand adjustsHeight, tilt, swivelHeight, tilt, swivel
VESA mountYesYes
Weight with stand12.22 kg18.23 kg
Height adjustment150 mm90 mm
Tilt-5° to 21°-5° to 10°
Swivel-30° to 30°-20° to 20°
Pivot–No pivot; slant -2° to 2°
VESA pattern100 x 100 mm100 x 100 mm, 200 x 100 mm, 200 x 200 mm
Size with stand946.62 x 252.80 x 472.32–622.32 mm (W x D x H)1223.32 x 255 x 576.79–666.79 mm (W x D x H)
Size without stand946.62 x 108.04 x 419.14 mm (W x D x H)1223.32 x 111.94 x 529.05 mm (W x D x H)
Weight without stand8.35 kg12.95 kg
Controls–Joystick; power and OSD button lock
Colours–Platinum Silver
Power and support
Power use39.5 W on mode, 0.4 W standby, 1.8 W networked standby, 0.3 W off, 380 W maximum63.6 W on mode, 0.5 W standby, 2.0 W networked standby, 0.3 W off, 430 W maximum
Energy classFG
Power supply100–240 VAC, 50/60 Hz, 4.2 A (typical)100–240 VAC, 50/60 Hz, 5.5 A (maximum)
SoftwareDell Display and Peripheral Manager (Easy Arrange)Dell Display and Peripheral Manager (Easy Arrange, KVM), Dell Color Management, Dell Device Management Console
CertificationsENERGY STAR, TCO Certified Edge, TÜV Rheinland Eye Comfort 3.0 (5 star)ENERGY STAR 8.0, EPEAT Gold with Climate+, TCO Certified 10.0 and TCO Certified Edge, TÜV Rheinland Eye Comfort 3.0 (5 star)
Warranty3 years limited hardware (UK)3 years with Advanced Exchange Service and Premium Panel Exchange (UK)
In the boxStand, 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 reportStand (not with the WOST version), power cable, DisplayPort 1.4 cable (1.8 m), HDMI 2.1 cable (1.8 m), USB-C to USB-A 10Gbps cable (1 m), Thunderbolt 4 40Gbps cable (2 m)

More comparisons