LG 40U990A-W. Display diagonal: 101.6 cm (40"), Display resolution: 5120 x 2160 pixels, HD type: WUHD, Response time: 5 ms, Native aspect ratio: 21:9, Viewing angle, horizontal: 178°, Viewing angle, vertical: 178°. Built-in speaker(s). VESA mounting, Height adjustment. Product colour: Black
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 (5120×2160) 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.
Up to 99% DCI-P3 Color Brilliance for Visual Pros
With up to 99% DCI-P3 color gamut coverage, this UltraFine™ display delivers bold, vibrant color across a wide spectrum—ideal for impactful video, photo, and design work in print, digital, and broadcast formats.
2000:1 Contrast for Stunning Visual Depth
Nano IPS Black enhances contrast to 2000:1, revealing richer shadows, deeper blacks, and sharper detail—perfect for bold color, improved depth, and edge-to-edge consistency.
5K2K Production Powered by Thunderbolt™ 5
Thunderbolt™ 5 supports commercial-level video, film, and game production with faster data transfer, 96W charging, and seamless 5K2K output—all through a single, stable, high-speed cable.
Daisy Chain Enhances Multitasking Efficiency
Daisy chain two monitors and a laptop via Thunderbolt™ 5 and DisplayPort—simplifying your workspace while expanding screen space for multitasking, content creation, or focused productivity
Versatile Ports for Limitless Possibilities
Thunderbolt™ 5, HDMI 2.1 (x2), DisplayPort 2.1 (UHBR 13.5) and USB-C let you connect laptops, cameras, and drives—no adapters needed. Enjoy stable, streamlined performance across creative, gaming, or professional workflows.
Dual Speakers. Deep, Immersive Sound.
Let the action surround you with dual speakers and Rich Bass—delivering deeper, fuller sound that enhances cinematic scenes.
FreeSync™ Premium Smooths Every Frame
FreeSync™ Premium keeps motion smooth and responsive, reducing screen tearing and stutter while mixing audio, gaming, or reviewing high-resolution video.
Personalized Your Display with Switch App
Easily customize image settings, split your screen into 11 layouts, and launch video calls instantly with the LG Switch App—streamlining your setup for productivity and entertainment.
Designed for Comfort and Focus
The narrow bezeled, 3-sided virtually borderless design and compact L-stand save space and reduce distractions, while tilt, height, and swivel adjustments support comfort and focus during long creative sessions.
Display diagonal: 101.6 cm (40″)
Display resolution: 5120 x 2160 pixels
HD type: WUHD
Native aspect ratio: 21:9
Panel type: Nano IPS
Feature: LED backlight
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
Feature: High Dynamic Range (HDR) supported
High Dynamic Range (HDR) technology: DisplayHDR 600, HDR Effect, High Dynamic Range 10 (HDR10)
Colour gamut standard: DCI-P3
DCI-P3 coverage: 99%
Performance
Feature: AMD FreeSync
AMD FreeSync type: FreeSync Premium
Multimedia
Number of speakers: 2
RMS rated power: 10 W
Feature: Built-in speaker(s)
Design
Product colour: Black
Ports & interfaces
Number of USB Type-C upstream ports quantity: 4
Feature: HDMI
HDMI ports quantity: 2
DisplayPorts quantity: 1
DisplayPort version: 2.1
Audio input: Yes
Feature: Headphone out
Feature: HDCP
HDCP version: 2.2
Network
Feature: Ethernet LAN
Ergonomics
Feature: VESA mounting
Panel mounting interface: 100 x 100 mm
Feature: Wall mountable
Feature: Height adjustment
Feature: Swivelling
Feature: Tilt adjustment
Feature: Picture-in-Picture
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
Packaging data
Package width: 1206.5 mm
Package depth: 200.7 mm
Package height: 419.1 mm
Package weight: 17.8 kg
Package type: Box
Packaging content
Feature: Stand included
Cables included: DisplayPort, HDMI, Thunderbolt, USB Type-C
Feature: Power adapter included
Feature: Manual
Other features
Country of origin: China
Brand specific technologies: Black Stabilizer
Feature: Picture-by-Picture (PbP)
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