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Overview

Get ready for next-level immersion with the LG 40-inch gaming monitor. Featuring a curved LED display with 5K resolution and a 21:9 aspect ratio, you'll feel like you're inside the gaming world. With a 5ms response time and 120Hz refresh rate, you'll enjoy smooth visuals, while AMD FreeSync Premium Pro prevents screen tearing for seamless gameplay.

LG 40" 5K 120Hz 5ms GTG Curved IPS LED FreeSync Gaming Monitor (40U990A-W) - White

Model: 40U990A-W
Web Code: 19458514
Sold and shipped by Best Buy

Available for deliveryAvailable for backorder

Backorders will be shipped by February 13

Not available for pickup

Not available for pickup

Sorry, at this time, this product cannot be picked up in-store.

Return Policy

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Manufacturer's Warranty

Check with the manufacturer for details or add Best Buy Protection for extra coverage.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

What's included:

  • LG Monitor
  • HDMI cable
  • Displayport cable
  • Thunderbolt cable
  • USB-C cable
  • 40-inch LED display with 5K (5120 x 2160) resolution delivers stunningly sharp visuals and captivating viewing experience
  • 21:9 aspect ratio provides an exceptionally immersive viewing experience for both gaming and entertainment content
  • Curved design enhances immersion by gently wrapping the display around your field of view, minimizing head and eye movement and helping reduce eye strain
  • 5ms response time and 120Hz refresh rate make fast action look smooth and clear for gaming and videos
  • AMD FreeSync Premium Pro eliminates screen tearing and stuttering, delivering smooth gameplay and seamless high-frame-rate content creation
  • Nano IPS Black technology provides deep colours and strong contrast, making it ideal for video editing and photography, especially in dark or low-light settings
  • 99% DCI-P3 colour accuracy and VESA DisplayHDR 600 deliver bright highlights and deep shadows for clear, true-to-life visuals
  • 178-degree wide viewing angle both horizontally (R/L) and vertically (U/D) ensures consistent, clear visuals from almost any position
  • Black Stabilizer enhances visibility in dark scenes, allowing gamers to easily spot enemies and details
  • Dynamic Action Sync (DAS) reduces input lag, allowing for fast and responsive gameplay
  • TUV five-star eye comfort certification reduces eye strain, making it easy to work or game for extended periods without discomfort
  • Live colour low blue light reduces eye strain by minimizing harmful blue light while maintaining vibrant, natural colours for comfortable, extended viewing
  • Flicker safe feature minimizes eye fatigue during prolonged use
  • Auto brightness automatically adjusts the screen for the best visibility, helping to reduce eye strain
  • 2PBP (Picture-by-Picture) and PIP (Picture-in-Picture) allow you to multitask efficiently by displaying content from two sources simultaneously on one screen
  • Two rich bass 10W speakers enhances your gaming immersion with superior audio
  • LG Switch and Dual Controller allow seamless management and control of multiple devices, enabling streamlined workflow
  • Smart energy saving reduces power consumption without compromising display performance
  • Two HDMI, one DisplayPort, Thunderbolt with 96W Power Delivery, USB-C (1 up, 4 down), two USB-A, KVM, RJ-45, and four-pole headphone out provide versatile connectivity options
Product Condition
Brand New
ENERGY STAR certified
No

Display

Screen Size
39.7 in
Resolution
5K
Native Resolution
5120 x 2160
Aspect Ratio
21:9
Display Type
LED
Touchscreen
No
Viewing Angle
178º(R/L), 178º(U/D)
Response Time (Grey-to-Grey)
5 ms
Refresh Rate
120 Hz
Brightness
450 cd/m²
Dynamic Contrast Ratio
2000:1
Colour Gamut
DCI-P3 99% (CIE1976)
3D Video Support Built-in
No
Built-In TV Tuner
No

Panel

Panel Technology
IPS
Panel Type
IPS
Curved
Yes

Audio

Built-in Speakers
Yes
Speaker Output Power
10W x2

Inputs/Outputs

Input/Output Types
2x HDMI; 1x DisplayPort; Thunderbolt (in/out) + 96W Power Delivery; USB-C (1 up, 4 down); USB-A x2; KVM, RJ-45; Headphone Out (4 pole mic + sound)
DVI-D Support
No
HDCP Support
Yes

Power

Typical Consumption
45 W
Stand-By Consumption
1.2 W
Auto Off
Yes
Energy Saving Mode
Yes

Stand/Mount Features

Tilt Adjustment
Yes
Swivel Adjustment
Yes
Height Adjustment
Yes
VESA Mountable
Yes
VESA Sizes Supported
100 x 100
Other Features
HDR 10; DisplayHDR™600; HDR Effect; Nano IPS™ Technology; Color Calibrated in Factory; HW Calibration Ready; Auto Brightness; Flicker Safe; Reader Mode; Color Weakness; Super Resolution+; AMD FreeSync™ FreeSync Premium; VRR; Black Stabilizer; Dynamic Action Sync; User Defined Key; Auto Input Switch; 2PBP; PIP; Smart Energy Saving; Live Color Low Blue Light

Physical Features

Colour
White
Dimensions with Stand (cm)
94.7 (W) x 61.4 (H) x 26 (D) cm
Dimensions with Stand (in)
37.28 (W) x 24.17 (H) x 10.24 (D) in
Dimensions without Stand (cm)
94.7 (W) x 41.9 (H) x 10.6 (D) cm
Dimensions without Stand (in)
37.28 (W) x 16.5 (H) x 4.17 (D) in
Weight (With Stand)
14.1 kg
Weight (Without Stand)
9.2 kg

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Information about the manufacturer’s availability guarantee can be found .