LG 39GX900A-B 39″ 240Hz Monitor

39 inch · 3440 x 1440 · 240 Hz · WOLED

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Screen size 39 inch
Resolution 3440 x 1440
Refresh rate 240 Hz
Panel WOLED
Response time 0.03 ms

LG 39GX900A-B 39″ 240Hz Monitor is a 39-inch monitor with 3440 x 1440 resolution, a 240 Hz refresh rate and WOLED panel. The high refresh rate makes fast games look smoother. It came out in 2025.

Released: 2025-08-19

Specifications

Key specs

Screen size: 39 inch
Resolution: 3440 x 1440
Refresh rate: 240 Hz
Panel: WOLED
Response time: 0.03 ms
Released: 2025-08-19
Part number: 39GX900A-B.AEK
EAN / UPC: 8806096497784

Display

Display diagonal: 99.1 cm (39")
Display resolution: 3440 x 1440 pixels
HD type: Wide Quad HD
Native aspect ratio: 21:9
Display technology: OLED
Panel type: WOLED
Display brightness (peak): 1300 cd/m²
Display brightness (typical): 275 cd/m²
Response time: 0.03 ms
Response time measurement type: GTG (Gray to Gray)
Anti-glare screen: Yes
Screen shape: Curved
Screen curvature rating: 800R
Contrast ratio (typical): 1500000:1
Maximum refresh rate: 240 Hz
Viewing angle, horizontal: 178°
Viewing angle, vertical: 178°
Display number of colours: 1.07 billion colours
Pixel pitch: 0.266 x 0.266 mm
Display diagonal (metric): 99.1 cm
High Dynamic Range (HDR) supported: Yes
High Dynamic Range (HDR) technology: DisplayHDR 400 True Black, HDR Effect, High Dynamic Range 10 (HDR10)
Colour gamut standard: DCI-P3
DCI-P3 coverage: 98.5%

Performance

NVIDIA G-SYNC: Yes
NVIDIA G-SYNC type: G-SYNC Compatible
AMD FreeSync: Yes
AMD FreeSync type: FreeSync Premium Pro
VESA Adaptive Sync support: Yes
Flicker-free technology: Yes
Low Blue Light technology: Yes
Game mode: Yes
Game features: Refresh Rate Optimizer
Smart modes: Energy saving

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Multimedia

Number of speakers: 2
RMS rated power: 7 W
Built-in speaker(s): Yes

Design

Market positioning: Gaming
Product colour: Black

Ports & interfaces

Built-in USB hub: Yes
USB Type-A downstream ports quantity: 2
USB Type-C downstream ports quantity: 1
USB Type-C DisplayPort Alternate Mode: Yes
USB Power Delivery (USB PD): Yes
USB Power Delivery up to: 65 W
HDMI: Yes
HDMI ports quantity: 2
HDMI version: 2.1
DisplayPorts quantity: 1
DisplayPort version: 1.4
Headphone out: Yes
HDCP: Yes
HDCP version: 2.3

Ergonomics

VESA mounting: Yes
Panel mounting interface: 100 x 100 mm
Wall mountable: Yes
Cable management: Yes
Height adjustment: Yes
Swivelling: Yes
Tilt adjustment: Yes
Picture-in-Picture: Yes

Power

Energy efficiency class (SDR): F
Energy efficiency class (HDR): G
Energy consumption (SDR) per 1000 hours: 38 kWh
Energy consumption (HDR) per 1000 hours: 41 kWh
Power consumption (typical): 41 W
Power consumption (standby): 0.5 W
Power consumption (off): 0.3 W
AC input voltage: 100 - 240 V
AC input frequency: 50/60 Hz
Power supply type: External

Weight & dimensions

Width (with stand): 887.8 mm
Depth (with stand): 322.8 mm
Height (with stand): 605.7 mm
Weight (with stand): 11.4 kg
Width (without stand): 887.8 mm
Depth (without stand): 198 mm
Height (without stand): 404.4 mm
Weight (without stand): 7.3 kg

Other features

Brand specific technologies: Black Stabilizer, DAS Mode, Eye care
FPS counter: Yes
Hardware calibration: Yes
Warranty period: 2 year(s)

Check the manufacturer's page before buying.

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About this product

UltraWide view with deep black OLED The 39-inch WQHD (3440x1440) display offers a 34% wider view than standard 16:9 screens, delivering sharp and clear visuals across the expansive display. This WQHD OLED represents boldly darker shadows, brighter lights, and vibrant colors for gameplay in any environment. Brightest OLED Experience stunning visuals with LG WOLED. Built on LG's OLED leadership and featuring Micro Lens Array+ (MLA+) technology, it delivers up to 37.5% brighter SDR, optimizing light efficiency and minimizing loss. It represents a standard luminosity of 275 nits (APL 100%) and a peak brightness of 1300 nits (APL 1.5%), ensuring vivid, true-to-life colors for immersive, precise gaming even in bright environments. Go wide. Not short. The 21:9 UltraWide sweet spot for gaming The 21:9 curved OLED monitor provides an immersive and captivating experience for both gaming and various entertainment content, thanks to its balanced and optimized aspect ratio. The ideal curvature 800R Immerse in the 800R curve for a consistent FOV (Field of View) on a desk designed to match natural sight, placing you at the core of its curvature.

39GX900A-B vs similar monitors

	LG 39GX900A-B 39″ 240Hz Monitor	LG 39GX90SA-W.AAU 39″ 240Hz Monitor	TCL X3 32X3A-R 32″ 240Hz Monitor	TCL X3 32X3A-G 32″ 240Hz Monitor
Screen size	39 inch	39 inch	32 inch	32 inch
Resolution	3440 x 1440	3440 x 1440	3840 x 2160	3840 x 2160
Refresh rate	240 Hz	240 Hz	240 Hz	240 Hz
Panel	WOLED	OLED	WOLED	WOLED
Response time	0.03 ms	0.03 ms	0.03 ms	0.03 ms
Released	2025	2026	2026	2026