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Dell Alienware 39 5K OLED (AW3926QW) vs Dell UltraSharp 40 Curved Thunderbolt Hub (U4025QW)

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

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DellAlienware 39 5K OLED (AW3926QW)DellUltraSharp 40 Curved Thunderbolt Hub (U4025QW)
Overview
ReleasedJune 2026January 2024
Display
Screen size38.9″39.7″
Resolution5120 × 2160 (5K2K)5120 × 2160 (5K2K)
Sharpness143 pixels per inch140 pixels per inch
PanelOLED (Tandem WOLED with RGB stripe; dual mode 2560 x 1080 at 330 Hz)IPS (IPS Black)
Refresh rate165 Hz120 Hz
Response time (grey to grey)0.03 ms5 ms
Brightness (typical)300 nits450 nits
HDR peak brightness1,300 nits600 nits
HDR certificationDisplayHDR True Black 500DisplayHDR 600
HDR formatsHDR10, Dolby Vision–
Contrast ratio1,750,000:12,000:1
Colour range99% DCI-P399% DCI-P3, 99% Display P3, 100% sRGB
DCI-P3 coverage99%99%
Colour accuracy (Delta E)Below 2Below 2
Screen finishGlossyMatte
ShapeCurved (1500R)Curved (2500R)
Adaptive syncG-Sync Compatible, FreeSync Premium Pro, VESA AdaptiveSync, HDMI VRRHDMI VRR
Subpixel layoutRGB stripe–
Colour depth1.07 billion colours (10-bit)1.07 billion colours (8-bit + A-FRC)
sRGB coverage–100%
Colour accuracyDelta E < 2 (average) (sRGB, DCI-P3)Delta E < 2 (average) (DCI-P3, Display P3, sRGB, BT.709); factory calibration report in the box
Colour modesStandard, Creator (DCI-P3 or sRGB), FPS, MOBA/RTS, RPG, Sports, three custom game modes–
HDR detail1300 cd/m² HDR peak at 3% APL; Smart HDR modes Desktop, Movie HDR, Game HDR, Custom Color HDR, DisplayHDR True Black (500 cd/m²), HDR Peak 1300 and HDR Peak 1300 Bright600 cd/m² HDR peak; HDR static metadata over HDMI
Response time detail–5 ms (Fast), 8 ms (Normal)
Variable refresh range–48–120 Hz (vertical scan range)
Viewing angles178° horizontal, 178° vertical (typical)178° horizontal, 178° vertical (typical)
Pixel pitch0.1776 mm x 0.1776 mm0.1815 mm x 0.1815 mm
Eye careFlicker-freeComfortView Plus hardware low blue light; TÜV Rheinland Eye Comfort 3.0 (5 star); ambient light sensor; flicker-free
Burn-in protectionAI-based pixel usage algorithm, pixel refresh, pixel shift and panel health indicator; 3-year warranty includes burn-in–
Connections
Video inputs2 × HDMI 2.1, DisplayPort 2.1, USB-CHDMI 2.1, DisplayPort 1.4, Thunderbolt 4
USB-C chargingUp to 90 WUp to 140 W
USB portsUSB-C, 2 × USB-A2 × USB-C, 5 × USB-A, Thunderbolt 4
KVM switchYesYes
EthernetNoYes
SpeakersNoYes
HDMI detail2 x HDMI 2.1 FRL (HDCP 1.4 & 2.3), up to 5120 x 2160 at 165 Hz or 2560 x 1080 at 330 Hz with HDR and VRR; one with eARC/ARC audio pass-through1 x HDMI, up to 5120 x 2160 at 120 Hz FRL with HDR static metadata and VRR as specified in HDMI 2.1
DisplayPort detail1 x DisplayPort 2.1 UHBR20 (HDCP 1.4 & 2.3), up to 5120 x 2160 at 165 Hz or 2560 x 1080 at 330 Hz1 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 detailUSB-C upstream with DisplayPort 2.1 Alt Mode and Power Delivery up to 90 W; 1 x USB-C 5Gbps downstream with 15 W chargingThunderbolt 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–Thunderbolt 4 downstream port (video and data, 15 W)
USB hub detailUSB 5Gbps; Type-B and USB-C upstream (KVM for two computers); 2 x Type-A downstream (one with BC 1.2 charging); 1 x USB-C downstream (15 W)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 picturePicture by Picture and Picture in PicturePicture by Picture and Picture in Picture, with KVM switching
Audio out3.5 mm headphone jack; HDMI eARC/ARC3.5 mm audio line out
Speaker detail–2 x 9 W
Design
Stand adjustsHeight, tilt, swivelHeight, tilt, swivel
VESA mountYesYes
Weight with stand11.22 kg12.22 kg
Height adjustment110 mm150 mm
Tilt-5° to 21°-5° to 21°
Swivel-20° to 20°-30° to 30°
VESA pattern100 x 100 mm100 x 100 mm
Size with stand920.49 x 242.50 x 470.10–580.10 mm (W x D x H)946.62 x 252.80 x 472.32–622.32 mm (W x D x H)
Size without stand920.49 x 129.65 x 408.24 mm (W x D x H)946.62 x 108.04 x 419.14 mm (W x D x H)
Weight without stand7.76 kg8.35 kg
ControlsJoystick–
ColoursNova Black–
Power and support
Power use40.3 W on mode, 0.5 W standby, 0.3 W off, 360 W maximum39.5 W on mode, 0.4 W standby, 1.8 W networked standby, 0.3 W off, 380 W maximum
Energy classGF
Power supply100–240 VAC, 50/60 Hz, 4 A (typical)100–240 VAC, 50/60 Hz, 4.2 A (typical)
SoftwareAlienware Command CenterDell Display and Peripheral Manager (Easy Arrange)
Certifications–ENERGY STAR, TCO Certified Edge, TÜV Rheinland Eye Comfort 3.0 (5 star)
Warranty3 years limited hardware with Advanced Exchange Service and Premium Panel Exchange, including burn-in (UK)3 years limited hardware (UK)
In the boxStand, power cable, USB-C to USB-C 10Gbps 100 W cable (1 m), DisplayPort cable (1.8 m), HDMI 2.1 FRL cable (1.8 m), USB-A to USB-B cable (1.8 m), microfibre clothStand, 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

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