LG 40U990A-W 40″ 120Hz Monitor

40 inch · 5120 x 2160 · 120 Hz · Nano IPS

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Screen size 40 inch
Resolution 5120 x 2160
Refresh rate 120 Hz
Panel Nano IPS
Response time 5 ms

LG 40U990A-W 40″ 120Hz Monitor is a 40-inch monitor with 5120 x 2160 resolution, a 120 Hz refresh rate and Nano IPS panel. Fine for work and everyday use; for fast shooters look at 144 Hz and up. It came out in 2025.

Released: 2025-07-11

Specifications

Key specs

Screen size: 40 inch
Resolution: 5120 x 2160
Refresh rate: 120 Hz
Panel: Nano IPS
Response time: 5 ms
Released: 2025-07-11
Part number: 40U990A-W
EAN / UPC: 0195174122365

Display

Display diagonal: 101.6 cm (40")
Display resolution: 5120 x 2160 pixels
HD type: WUHD
Native aspect ratio: 21:9
Panel type: Nano IPS
LED backlight: Yes
Backlight type: Edge-Lit
Display brightness (typical): 450 cd/m²
Response time: 5 ms
Response time measurement type: GTG (Gray to Gray)
Screen shape: Curved
Screen curvature rating: 2500R
Contrast ratio (typical): 2000:1
Maximum refresh rate: 120 Hz
Viewing angle, horizontal: 178°
Viewing angle, vertical: 178°
Display number of colours: 1.06 billion colours
Pixel pitch: 0.1815 x 0.1815 mm
Pixel density: 139 ppi
Display diagonal (metric): 101 cm
High Dynamic Range (HDR) supported: Yes
High Dynamic Range (HDR) technology: DisplayHDR 600, HDR Effect, High Dynamic Range 10 (HDR10)
Colour gamut standard: DCI-P3
DCI-P3 coverage: 99%

Performance

AMD FreeSync: Yes
AMD FreeSync type: FreeSync Premium

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Multimedia

Number of speakers: 2
RMS rated power: 10 W
Built-in speaker(s): Yes

Design

Product colour: Black

Ports & interfaces

Number of USB Type-C upstream ports quantity: 4
HDMI: Yes
HDMI ports quantity: 2
DisplayPorts quantity: 1
DisplayPort version: 2.1
Audio input: Yes
Headphone out: Yes
HDCP: Yes
HDCP version: 2.2

Network

Ethernet LAN: Yes

Ergonomics

VESA mounting: Yes
Panel mounting interface: 100 x 100 mm
Wall mountable: 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: 40 kWh
Energy consumption (HDR) per 1000 hours: 58 kWh
Power consumption (typical): 45 W
Power consumption (standby): 1.2 W
Power consumption (off): 0.3 W
AC input voltage: 100 - 240 V
AC input frequency: 50/60 Hz
Power supply type: External
Energy efficiency scale: A to G

Weight & dimensions

Width (with stand): 947.4 mm
Depth (with stand): 259.1 mm
Height (with stand): 614.7 mm
Weight (with stand): 14.1 kg
Width (without stand): 947.4 mm
Depth (without stand): 106.7 mm
Height (without stand): 419.1 mm
Weight (without stand): 9.21 kg

Other features

Brand specific technologies: Black Stabilizer
Picture-by-Picture (PbP): Yes

Check the manufacturer's page before buying.

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About this product

The World’s First 5K2K Monitor with Thunderbolt™ 5 The LG UltraFine™ 40U990A is the world’s first 5K2K widescreen monitor with Thunderbolt™ 5, delivering ultra-fast data transfer, 96W charging, and dual display support. The monitor's 40” curved (2500R), Nano IPS Black panel offers brilliant color, and spectacular contrast - a new go-to display for creators, multritaskers and gamers. 5K2K Means More Pixels for More Creative Control The 5K2K (5120x2160) Nano IPS Black display offers 33% more pixels than standard 4K UHD, delivering ultra-wide resolution, vivid color, and razor-sharp detail—creating a spacious, precise workspace ideal for video editing, graphic design, photography, and color-critical tasks. Built for creators. Ready for professionals. Built for creative flow, the UltraFine™ 5K2K screen makes it easy to work across complex timelines, layered interfaces, and multiple windows—ideal for editing, producing, and programming. VESA DisplayHDR™ 600 Meets Nano IPS Black Brilliance VESA DisplayHDR™ 600 and Nano IPS Black combine to deliver deep blacks, vivid highlights, and cinematic color—ideal for creators who need precision in light, shadow, and texture.

User manual (PDF)

40U990A-W vs similar monitors

	LG 40U990A-W 40″ 120Hz Monitor	Lenovo ThinkVision P40WD-40 Monitor	LG 32U990A-S 32″ 60Hz Monitor	BenQ PV3250U 32″ 120Hz Monitor
Screen size	40 inch	40 inch	32 inch	32 inch
Resolution	5120 x 2160	5120 x 2160	6144 x 3456	3840 x 2160
Refresh rate	120 Hz	120 Hz	60 Hz	120 Hz
Panel	Nano IPS	IPS	Nano IPS	IPS
Response time	5 ms	4 ms	5 ms	5 ms
Released	2025	2026	2026	2026