Readers’ Choice best monitor lineup for gamers and those demanding high-quality performance
LG UltraFine Monitor logo.
UltraFine™ stands on a desk along with keyboard and a pad. A video-creating program is on the screen.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
5 different images with text implying UltraFine's key features
No images included
The 5K2K Nano IPS Black display (5120x2160) offers 33% more pixels* than standard 4K UHD (3840x2160), providing a wider canvas to view more content and reducing the need to switch between programs. Its high resolution delivers razor-sharp images and precise detail, making it suitable for professional video editing, graphic design, and any visual work where accuracy is critical. The vivid clarity allows you to spot even the fine details without constant zooming or panning.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Nano IPS is an advanced IPS technology that uses nanometre-sized particles on the screen's LED.
*The total number of pixels was calculated by multiplying the horizontal and vertical resolutions, resulting in 8.29 million pixels for 4K UHD and 11.05 million pixels for 5K2K.
For tasks like colour grading, music production, and coding, the 40-inch 5K2K display provides the clarity and screen area needed for focus and precision.
In a dark room with blue and violet lighting a UltraFine monitor stands with recording program on it. On the desk where it stands a keyboard, tablet, headphone and other accessories are placed.
For tasks like colour grading, music production, and coding, the 40-inch 5K2K display provides the clarity and screen area needed for focus and precision.
A guy is working with a video-creating program on UltraFine Monitor.
For tasks like colour grading, music production, and coding, the 40-inch 5K2K display provides the clarity and screen area needed for focus and precision.
A guy is working with design program on UltraFine Monitor. A camera is placed next to the monitor.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*Nano IPS is an advanced IPS technology that uses nanometre-sized particles on the screen's LED.
Front view of UltraFine monitor with a girl's image in it showing how color is shown accurately on it.
Images simulated to enhance feature understanding. It may differ from actual use.
Covering 99% (Typ.) of the DCI-P3 colour gamut, this display offers a 25% wider range than sRGB — capturing nearly all the colours used in print, digital, and broadcast media. From vivid tones to subtle nuances, it ensures accurate colour reproduction for lifelike video and photo output.
A full-size screen image with designing program showing vibrant colours.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Brightness: 450nits (Typ.), Colour Gamut: DCI-P3 99% (Typ.)
Contrast 2000:1
Contrast 1000:1
Images simulated to enhance feature understanding. It may differ from actual use.
Nano IPS is an advanced IPS technology that uses nanometre-sized particles on the screen's LED.
Nano IPS Black technology boosts the standard IPS contrast ratio from 1000:1 to 2000:1. This enhancement delivers more vibrant colours and sharper details across objects, shadows, and backgrounds. Enjoy deeper blacks and richer shadows with consistent colour expression from edge to edge — bringing a heightened sense of realism to your visual content.
This display has earned TÜV Rheinland’s 5-Star Eye Comfort certification under the new Eye Comfort 3.0 standard, reflecting its commitment to visual well-being. It combines a high refresh rate, precise colour accuracy, and integrated low blue light technology — utilising both RGB hardware and software tuning — to minimise harmful emissions without compromising colour fidelity.
TÜV Rheinland certification ID (Eye Comfort): 1111298743
Images simulated to enhance feature understanding.
No images included
Thunderbolt™ 5 enables the production of commercial outputs such as documentary videos, movies, and game titles on an outstanding 5K2K display. It also offers data transfers that are twice as fast to connected devices compared to Thunderbolt™ 4 and allows for charging your laptop (up to 96W) through a single cable, ensuring stability, scalability, and security.
(Up to to 80 Gbps）
A UltraFine monitor is placed with program screen on it beside a smaller monitor, a PC and a storage, connected with cables showing its multi-connectivity.
To work properly, the Thunderbolt 5 cable included in this package is required to connect the Thunderbolt 5 port to the monitor.
To access all features including 96W charging and 5120×2160 @120Hz output, your device must support Thunderbolt 5 or DisplayPort 2.1.
DP, HDMI, USB-C and Thunderbolt cables are included in the package.
With support for Thunderbolt™ 5 and DisplayPort, the display enables 5K2K Daisy Chain connectivity — allowing you to link two monitors and a laptop in a streamlined setup that boosts productivity.
Two UltraFine monitors are placed side by side, connecting to one another with a laptop. The workstation shows how seemlessly the whole devices are connected.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
DPx1, HDMIx1, USB-Cx1, Power cordx1 and Thunderboltx1 cables are included in the package.
Close-up image of UltraFine monitor's ports to show the various cable connectivity it has.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
No images included
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
FreeSync Premium technology ensures smooth, fluid motion by minimising screen tearing and stuttering — ideal for mixing audio while reviewing fast-paced games or high-resolution movies.
The LG Switch app enhances your monitor experience for both work and play. Easily personalise image quality and brightness with the intuitive picture wizard. Plus, you can split the screen into 11 parts and quickly launch your video call platform for added convenience.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
To download the latest version of the LG Switch app, search for 40U990A in the LG.com Support Menu
Featuring a 3-sided narrow bezel design and a sleek L-stand, this monitor minimises clutter while maximising desk space. Its fully adjustable base allows for swivel, tilt, and height customisation — enhancing workflow efficiency and helping you stay focused longer, whether you're editing video clips or retouching photos.
Front view of UltraFine monitor with its infill image on it.
Top view of UltraFine monitor in a white background
Side view of UltraFine monitor in a white background
Rear view of UltraFine monitor in a white background
（-20°〜20°）
（-5°〜20°）
（130mm）
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Display - Size [Inch]
39.7
Display - Resolution
5120 x 2160
Display - Panel Type
Panel Type
Display - Aspect Ratio
21:9
Display - Color Gamut (Typ.)
DCI-P3 99% (CIE1976)
Display - Brightness (Typ.) [cd/m²]
450 cd/m²
Display - Curvature
2500R
Display - Refresh Rate (Max.) [Hz]
120
Display - Response Time
5ms (GtG at Faster)
Mechanical - Display Position Adjustments
Tilt/Height/Swivel
Size [Inch]
39.7
Aspect Ratio
21:9
Panel Type
Panel Type
Response Time
5ms (GtG at Faster)
Resolution
5120 x 2160
Pixel Pitch [mm]
0.1815 x 0.1815 mm
Viewing Angle (CR≥10)
178º(R/L), 178º(U/D)
Brightness (Typ.) [cd/m²]
450 cd/m²
Contrast Ratio (Typ.)
2000:1
Color Gamut (Typ.)
DCI-P3 99% (CIE1976)
Curvature
2500R
Color Gamut (Min.)
DCI-P3 95% (CIE1976)
Refresh Rate (Max.) [Hz]
120
Brightness (Min.) [cd/m²]
360 cd/m²
Contrast Ratio (Min.)
1400:1
Size [cm]
100.859cm
Built-in KVM
Yes
HDMI
YES(2ea)
Daisy Chain
Yes(UHD/120Hz)
DisplayPort
YES(1ea)
DP Version
2.1 (UHBR 13.5)
Thunderbolt
Yes(In 1ea / Out 1ea)
Headphone out
4-pole (Mic + Sound)
LAN (RJ-45)
Yes
Thunderbolt (Data Transsmission)
Yes
Thunderbolt (Power Delivery)
96W
USB Downstream Port
USB-C *4EA(15W*1EA, 4.5W*3EA) 10Gbps USB-A *2EA 10Gbps
USB Upstream Port
Yes(via Thunderbolt & USB-C 10Gbps)
HDR 10
Yes
AMD FreeSync™
FreeSync Premium
Auto Brightness
Yes
Color Weakness
YES
Smart Energy Saving
Yes
Color Calibrated in Factory
YES
PIP
Yes
PBP
Yes (2PBP)
Flicker Safe
Yes
HW Calibration
HW Calibration Ready
Dynamic Action Sync
Yes
Black Stabilizer
YES
Reader Mode
Yes
VRR
Yes
Super Resolution+
Yes
VESA DisplayHDR™
DisplayHDR™600
Nano IPS™ Technology
Yes
User Defined Key
Yes
Auto Input Switch
Yes
HDR Effect
Yes
Display Position Adjustments
Tilt/Height/Swivel
Wall Mountable [mm]
100 x 100 mm
Rich Bass
Yes
Speaker
10W x 2
Dimension in Shiping (W x H x D) [mm]
1206 * 534 * 201 mm
Dimension with Stand (W x H x D) [mm]
947.7 * 614.3 * 260 mm
Dimension without Stand (W x H x D) [mm]
947.7 * 419.8 * 106.3 mm
Weight in Shipping [kg]
17.8 kg
Weight with Stand [kg]
14.1 kg
Weight without Stand [kg]
9.2 kg
Product name
UltraWide
Year
Y25
Power Consumption (Sleep Mode)
Less than 1.2W
Power Consumption (Typ.)
45W
Power Consumption (DC Off)
Less than 0.3W
AC Input
100~240V (50/60Hz)
Type
Built-in Power
Display Port
Yes(2.1)
HDMI
Yes
Thunderbolt
Yes
USB-C
Yes
Dual Controller
YES
LG Calibration Studio (True Color Pro)
YES
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