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LG UltraGear OLED 34GX900A vs LG UltraGear OLED 45GX950A

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

Better figure, where one is clearly better

LGUltraGear OLED 34GX900ALGUltraGear OLED 45GX950A
Overview
ReleasedSeptember 2025April 2025
Display
Screen size34″44.5″
Resolution3440 × 1440 (UWQHD)5120 × 2160 (5K2K)
Sharpness110 pixels per inch125 pixels per inch
PanelOLED (LG Display WOLED with MLA+ (TFTCentral))OLED (LG Display WOLED with RGWB subpixels; dual mode 2560 × 1080 at 330 Hz (TFTCentral, from LG))
Refresh rate240 Hz165 Hz
Response time (grey to grey)0.03 ms0.03 ms
Brightness (typical)275 nits275 nits
HDR peak brightness1,300 nits–
HDR certificationDisplayHDR True Black 400DisplayHDR True Black 400
HDR formatsHDR10HDR10
Contrast ratio1,500,000:11,500,000:1
Colour range98.5% DCI-P3 (typical)98.5% DCI-P3 (typical)
DCI-P3 coverage98.5%98.5%
ShapeCurved (800R)Curved (800R)
Adaptive syncFreeSync Premium Pro, G-Sync CompatibleFreeSync Premium Pro, G-Sync Compatible
Subpixel layout–RGWB (TFTCentral)
Colour depth1.07 billion colours10-bit, 1.07 billion colours
Colour modesReader Mode, Colour Weakness modeReader Mode, Colour Weakness mode; HDR Effect
HDR detailHDR10; VESA DisplayHDR True Black 400; 1,300 nits peak (TFTCentral, from LG)HDR10; VESA DisplayHDR True Black 400
Viewing angles178° / 178°178° / 178°
Pixel pitch0.231 × 0.231 mm0.2035 × 0.2035 mm
CalibrationFactory calibrated; hardware calibration ready (LG Calibration Studio)Factory calibrated; hardware calibration ready (LG Calibration Studio)
Connections
Video inputs2 × HDMI 2.1, DisplayPort 1.4, USB-C2 × HDMI 2.1, DisplayPort 2.1, USB-C
USB-C chargingUp to 65 WUp to 90 W
USB ports2 × USB-A2 × USB-A
SpeakersYesYes
HDMI detail2 × HDMI 2.1 (cable included)2 × HDMI 2.1 (1.8 m cable included)
DisplayPort detailDisplayPort 1.4 with DSCDisplayPort 2.1 with DSC (cable included)
USB-C detailUSB-C with DisplayPort Alt Mode and 65 W power deliveryUSB-C with video up to 5120 × 2160 at 165 Hz, data and 90 W power delivery; also the USB upstream port
USB hub detail2 × USB 3.0 downstream2 × USB 3.0 downstream
Picture by picturePIP; 2-way PBPPIP; 2-way PBP
Audio out4-pole headphone out (sound and mic)4-pole headphone out (sound and mic), DTS Headphone:X
Speaker detail2 × 7 W2 × 10 W, Rich Bass
Design
Stand adjustsHeight, tilt, swivelHeight, tilt, swivel
VESA mountYesYes
Weight with stand10.4 kg14 kg
VESA pattern100 × 100 mm100 × 100 mm
Size with stand784.1 × 291.8 × 470.4–580.4 mm (W × D × H)991.6 × 342 × 545.6–665.6 mm (W × D × H)
Size without stand784.1 × 167.1 × 358.3 mm (W × D × H)991.6 × 225.5 × 460.7 mm (W × D × H)
Weight without stand6.2 kg9.4 kg
ControlsUser-defined key; auto input switch; dual controller; game features include Black Stabiliser, Dynamic Action Sync, Crosshair and FPS Counter4-way joystick; user-defined key; auto input switch; dual controller; Unity Hexagon Lighting
Power and support
Power useLess than 0.5 W sleep, less than 0.3 W offLess than 0.5 W sleep, less than 0.3 W off
Power supplyExternal adapter, 100–240 VExternal adapter, 20 V / 18 A output, 100–240 V input
In the boxHDMI 2.1 cable, USB-C cable, DisplayPort cableHDMI 2.1 cable, DisplayPort 2.1 cable, USB-C cable, power adapter and cord, mouse holder

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