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Dell Alienware 34 240Hz QD-OLED (AW3425DW) vs LG UltraGear OLED 34GX900A

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

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DellAlienware 34 240Hz QD-OLED (AW3425DW)LGUltraGear OLED 34GX900A
Overview
ReleasedApril 2025September 2025
Display
Screen size34.2″34″
Resolution3440 × 1440 (UWQHD)3440 × 1440 (UWQHD)
Sharpness109 pixels per inch110 pixels per inch
PanelQD-OLEDOLED (LG Display WOLED with MLA+ (TFTCentral))
Refresh rate240 Hz240 Hz
Response time (grey to grey)0.03 ms0.03 ms
Brightness (typical)250 nits275 nits
HDR peak brightness1,000 nits1,300 nits
HDR certificationDisplayHDR True Black 400DisplayHDR True Black 400
HDR formats–HDR10
Contrast ratio1,500,000:11,500,000:1
Colour range99.3% DCI-P398.5% DCI-P3 (typical)
DCI-P3 coverage99.3%98.5%
Colour accuracy (Delta E)Below 2–
Screen finishGlossy–
ShapeCurved (1800R)Curved (800R)
Adaptive syncG-Sync Compatible, FreeSync Premium Pro, VESA AdaptiveSync, HDMI VRRFreeSync Premium Pro, G-Sync Compatible
Colour depth1.07 billion colours1.07 billion colours
Colour accuracyDelta E < 2 (average) (sRGB, DCI-P3)–
Colour modesStandard, Creator, FPS, MOBA/RTS, RPG, Sports, three custom game modesReader Mode, Colour Weakness mode
HDR detail1000 cd/m² HDR peak at 3% APLHDR10; VESA DisplayHDR True Black 400; 1,300 nits peak (TFTCentral, from LG)
Variable refresh range48–240 Hz (vertical scan range)–
Viewing angles178° horizontal, 178° vertical (typical)178° / 178°
Pixel pitch0.2315 mm x 0.2315 mm0.231 × 0.231 mm
Calibration–Factory calibrated; hardware calibration ready (LG Calibration Studio)
Eye careComfortView Plus hardware low blue light (TÜV Rheinland Hardware Solution); flicker-free–
Burn-in protectionDell gives its QD-OLED Alienware monitors a 3-year limited warranty that covers burn-in–
Connections
Video inputs2 × HDMI 2.1, DisplayPort 1.42 × HDMI 2.1, DisplayPort 1.4, USB-C
USB-C chargingNoneUp to 65 W
USB portsUSB-C, USB-A2 × USB-A
EthernetNo–
SpeakersNoYes
HDMI detail2 x HDMI 2.1 FRL (HDCP 1.4 & 2.3), up to 3440 x 1440 at 240 Hz with HDR and VRR2 × HDMI 2.1 (cable included)
DisplayPort detail1 x DisplayPort 1.4 (HDCP 1.4 & 2.3), up to 3440 x 1440 at 240 Hz with DSC and HDRDisplayPort 1.4 with DSC
USB-C detail1 x USB-C 5Gbps downstream port with 15 W charging (no video)USB-C with DisplayPort Alt Mode and 65 W power delivery
USB hub detailUSB 5Gbps; 1 x Type-B upstream; 1 x Type-A downstream; 1 x USB-C downstream (15 W)2 × USB 3.0 downstream
Picture by picturePicture by Picture and Picture in PicturePIP; 2-way PBP
Audio out–4-pole headphone out (sound and mic)
Speaker detail–2 × 7 W
Design
Stand adjustsHeight, tilt, swivelHeight, tilt, swivel
VESA mountYesYes
Weight with stand8.14 kg10.4 kg
Height adjustment110 mm–
Tilt-5° to 21°–
Swivel-20° to 20°–
VESA pattern100 x 100 mm100 × 100 mm
Size with stand814.15 x 232 x 445.08–555.08 mm (W x D x H)784.1 × 291.8 × 470.4–580.4 mm (W × D × H)
Size without stand814.15 x 111.23 x 361.55 mm (W x D x H)784.1 × 167.1 × 358.3 mm (W × D × H)
Weight without stand5.09 kg6.2 kg
ControlsJoystickUser-defined key; auto input switch; dual controller; game features include Black Stabiliser, Dynamic Action Sync, Crosshair and FPS Counter
Power and support
Power use31.0 W on mode, 0.5 W standby, 0.3 W off, 190 W maximumLess than 0.5 W sleep, less than 0.3 W off
Power supply100–240 VAC, 50/60 Hz, 2.8 A (typical)External adapter, 100–240 V
SoftwareAlienware Command Center–
In the boxStand, power cable, HDMI 2.1 FRL cable (1.8 m), DisplayPort 1.4 cable (1.8 m), USB-A to USB-B 5Gbps cable (1.8 m), microfibre clothHDMI 2.1 cable, USB-C cable, DisplayPort cable

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