View 40U990A Gallery in high resolution

$1750

Available on Amazon Updated Aug 30, 2026 Prime FBA

Overall90.3

Work96.2

Play81.9

Refresh73.0

Response60.0

Color100.0

Quality / price10.3

$1750 on Amazon Add this monitor to a build Compare this monitor Monitor table

Written analysis

40U990A at a glance

The 40U990A is a 39.7" IPS monitor at 5120×2160 and 120 Hz. The listed aspect ratio is ultrawide. The panel is curved at 2500R. The backlight is listed as Edge LED (Local Dimming).

Best fit: productivity, document work, and color-sensitive desktop use where sharpness and office panel class matter.

Panel and image

Overall quality is 90.3, with 96.2 work and 81.9 play. Pixel density is listed at 140 PPI. Typical brightness is 450 nits with a peak of 600 nits. Contrast is listed as 2000:1. The coating is Anti-glare/Matte (3H). The listed pixel count sits in the high-resolution class used by the work and overall scores.

Color and HDR

Recorded gamut coverage is 99% DCI-P3. Color depth is listed as 8-bit. Local dimming is recorded as Edge-lit with 8 zones. The work score places it in the productivity class expected for long document, spreadsheet, and coding sessions.

Motion and sync

Refresh is listed at 120 Hz. Response time is listed as 5.00 ms. The play score covers mainstream gaming and media; competitive high-refresh use still depends on the GPU keeping up. Pair this resolution with the GPU table before assuming native high settings.

Ergonomics and connectivity

Stand and mount options are listed as Height · Swivel · Tilt · VESA (100x100mm). Recorded inputs include 1 x USB 3.2 (Type-C; Gen 2; 10 Gbps; upstream; data only), 4 x USB 3.2 (Type-C; Gen 2; 10 Gbps; downstream), 2 x USB 3.2 (Type-A; Gen 2; 10 Gbps; downstream), 1 x Ethernet RJ45, 2 x HDMI 2.1 (DSC), 1 x DisplayPort 2.1 (UHBR20), 1 x Thunderbolt 5.0 (out; 80 Gbps; 15W), 1 x Thunderbolt 5.0 (in; 80 Gbps; 96W), 1 x 3.5 mm Audio Out (4-pole). Speakers are listed as 2 x 10 W (watts).

Buying verdict

Overall quality is 90.3, a flagship result. Buy it when the panel class, color, and motion extras will actually be used.

At the recorded Amazon price, quality / price is 10.3. This is a feature-first purchase; compare nearby screens if several extras would go unused.

Work / price is 11.0 and play / price is 6.6.

Display data

Full specifications

Panel, color, motion, connectivity, ergonomics, power, and value in one sheet.

General

Manufacturer: LG
Monitor: 40U990A
Series: UltraFine
Panel maker: LG Display
Panel model: LM400RW2-SSA1
Launch price: —
Amazon price: $1750
Amazon availability: Available
Price updated: Aug 30, 2026
Launch date: Jan 1, 2025

Panel

Size: 39.7"
Panel type: IPS
Resolution: 5120×2160
Aspect ratio: —
Pixel density: 140 PPI
Brightness: 450 nits · peak 600 nits
Contrast: 2000:1
Display area: 91.57 in²
Viewing angles: 178 ° (degrees) / 178 ° (degrees)
Backlight: Edge LED (Local Dimming)
Coating: Anti-glare/Matte (3H)
Curvature: 2500R

Color & HDR

Color depth: 8-bit
Colors: 16777216
DCI-P3: 99.00%
sRGB: —
Adobe RGB: —
NTSC: —
HDR: —
Local dimming: Yes · Edge-lit · 8 zones

Motion

Refresh rate: 120 Hz
Response time: 5.00 ms
Input lag: —
Adaptive sync: —

Connectivity

Inputs: 1 x USB 3.2 (Type-C; Gen 2; 10 Gbps; upstream; data only), 4 x USB 3.2 (Type-C; Gen 2; 10 Gbps; downstream), 2 x USB 3.2 (Type-A; Gen 2; 10 Gbps; downstream), 1 x Ethernet RJ45, 2 x HDMI 2.1 (DSC), 1 x DisplayPort 2.1 (UHBR20), 1 x Thunderbolt 5.0 (out; 80 Gbps; 15W), 1 x Thunderbolt 5.0 (in; 80 Gbps; 96W), 1 x 3.5 mm Audio Out (4-pole)
Speakers: 2 x 10 W (watts)

Ergonomics

Height adjustment: Yes
Pivot: No
Swivel: Yes
Tilt: Yes
VESA mount: Yes · 100x100mm

Power & value

Typical power: 45.00 W
Max power: —
Overall: 90.3
Work: 96.2
Play: 81.9
Quality / price: 10.3
Work / price: 11.0
Play / price: 6.6

Additional information

Features: 3-sided virtually borderless design, AMD Freesync Premium, Ambient Light Sensor, Auto Input Switch, Backlight Sensor, Color Weakness Mode, Dual Controller, Flicker-free technology, IPS Black, KVM Switch, Low Blue Light, Picture-by-Picture, Picture-in-Picture, Reader Mode
Display extras: Local dimming zones - 8
Accessories: DisplayPort 2.1 cable, HDMI 2.1 cable, Thunderbolt 5 cable, USB Type-C to Type-C cable
Amazon warranty: 1 Year Manufacturer
Amazon dimensions: {'width': 37.3, 'height': 24.2, 'length': 10.2, 'weight': 31.1}

Extracted notes sit here. Amazon listing copy, when present, is at the bottom of the page.

Amazon

Price history

Nearby quality

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LG 40U990A This monitor

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Vendor copy

Amazon listing details

Marketplace feature text kept for reference. Structured specifications above are the source for scores and comparisons.

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, multitaskers and gamers.

Sharper 5K2K Details on a Wide Creative Canvas - The 5K2K (5120x2160) Nano IPS Black display offers ultra-wide resolution, vivid color, and razor-sharp detail—providing a spacious, precise workspace ideal for video editing, graphic design, photography, and color-critical creative 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, 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.