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LG UltraGear™ 39-inch OLED 240Hz WQHD Curved Smart Gaming Monitor | webOS, 0.03ms (GtG), 240Hz, DisplayHDR True Black 400
Key Features
UltraGear™ OLED GX9s Logo image.
Front image of the UltraGear™ 39gx90sa gaming monitor.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
webOS
AI Picture
Dynamic Tone Mapping
AI Personalised Picture Wizard
AI Sound
39-inch WQHD Curved OLED
DisplayHDR True Black 400 & DCI-P3 98.5%
0.03ms (GtG) & 240Hz
AMD FreeSync™ Premium
VESA Certified AdaptiveSync
NVIDIA® G-SYNC® Compatible
USB-C (PD 65W) & HDMI 2.1
LG Switch app
Sleek design with clutter-minimising L stand
Introducing the 39-inch webOS-powered smart gaming monitor with LG AI. Relax during game breaks with effortless streaming of your favourite content on free LG Channels and numerous streaming option. Plus, access high-performance cloud gaming without a separate PC or console, all easily controlled with the remote for added convenience.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Internet connection and subscription to related streaming services are required and must be purchased separately.
The Remote Control is included in the package.
The smart monitor screen placed on the table displays the MUSIC APP screen.
The smart monitor screen placed on the table displays the SPORTS APP screen.
The images simulated to enhance feature understanding. It may differ from actual use.
The above keyboard, mouse, headset, and game controller are not included in the package and must be purchased separately.
Internet connection and subscription to related streaming services are required. Separate streaming services may require a subscription payment, and should be purchased separately.
AI Picture
AI Picture delivers lifelike game visuals that highlight faces and bodies, reduce noise, and add depth. Every detail, from subtle expressions to enemy movements, is easy to catch, ensuring a focused screen for total immersion in gaming or streaming.
Comparison images with AI Picture function on and off.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Not available in PC connection and Game Optimiser mode.
Dynamic Tone Mapping
Enjoy visuals as they were meant to be seen, with Dynamic Tone Mapping adjusting brightness and contrast for optimal detail and realism. Movies and games come alive with rich immersion and consistent quality across all content.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Available only when HDR video signal is input.
AI Personalised Picture Wizard
Pick an image you like, and AI Personalised Picture Wizard will find your perfect match from 85 million choices, saving it to your profile. Get ready to level up your gaming and video experience with a look that's uniquely you.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
AI Sound
Detects your space and delivers perfectly tuned audio through a simulated 9.1 channel setup, pinpointing sound locations for a tactical edge without the need for extra speakers or headsets. Also, it distinguishes the gamer's voice from ambient sound, adjusting voice levels and clarity to keep you focused on your game.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
The 39-inch WQHD (3440x1440) display offers a 34% wider view than standard 16:9 screens, delivering sharp and clear visuals across the expansive display. While gaming in any setting, this WQHD OLED monitor displays bold and dark shadows, bright lighting and vibrant colours.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*Among LG OLED gaming monitors with MLA+. SDR brightness is 37.5% higher than our previous models (27GR95QE, 45GR95QE) based on published specifications.
No more fisheye experience to see both sides of any 32:9 ratio panel at once. Thanks to the balanced and optimised aspect ratio, the 21:9 curved OLED monitor provides an immersive experience for both gaming and other forms of entertainment content.
The 21:9 curved OLED monitor provides an immersive and captivating experience with a balanced and optimized aspect ratio.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Immerse in the 800R curve designed to match natural sight, placing you at the core of its curvature. Dive into vivid, distortion-free graphics as you explore the gaming universe.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
The viewing experience may vary depending on the distance from the screen and the user's posture.
Experience unparalleled depth and vibrant realism with VESA DisplayHDR true black 400, delivering detailed black expression even in the darkest scenes. With a 1.5M:1 contrast ratio, DCI-P3 98.5% (typical) colour gamut ensures that colours are displayed with realistic detail, just as originally intended.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
1.5M:1 is the contrast ratio at 25% APL (Average Picture Level) value which is given as a percentage and refers to the value between the black level and the reference level for white.
LG WOLED’s advanced anti-glare technology minimises frustrating reflections and distractions, delivering crystal-clear gaming performance by maintaining consistent clarity in any lighting. Additionally, with Triple UL certification for reducing harmful blue light while preserving vivid colour tones and lifelike visuals, it provides visual comfort and a smoother gaming experience—whether you’re gaming in bright environments or LED-lit rooms.
Curved gaming monitor showing a robot character in a futuristic setting, with UL certifications below.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*LG OLED panels have been certified as Flicker-Free, Discomfort Glare Free, and Low Blue Light by UL.
*Certificate Number: Flicker-Free Display (OLED) - A196009, Discomfort Glare Free - V563481 (conditions of UGR less than 22), Low Blue Light Hardware Solution Platinum - V745051.
*The above feature may vary depending on the user’s computing environment or conditions.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Powered by AMD FreeSync™ Premium, NVIDIA-validated G-SYNC® compatibility, and VESA AdaptiveSync™ certification, this monitor ensures tear-free, ultra-smooth visuals and low latency, delivering unmatched gaming precision and fluidity.
Image of a green car racing on a track.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
The performance of the feature is compared to the models not applying the sync technology.
Errors or delays may occur depending on the network connection.
•Low Latency reduces input lag for real-time response.
•Black Stabiliser brightens dark scenes, helping gamers spot enemies and details.
•Crosshair enhances precision for deadly accuracy.
•FPS Counter shows your real-time frame rate.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
The Crosshair feature is unavailable while FPS Counter is activated.
FPS Counter may display the value that exceeds the monitor’s maximum refresh rate.
FPS (Frame Per Second) Counter: Measurement of frames per second.
Connect your laptop to the monitor with a USB-C cable for up to 65W power delivery, eliminating the need for a separate adapter. Enjoy WQHD resolution and a 240Hz refresh rate via DP 1.4 or HDMI 2.1, ensuring your gaming remains uninterrupted.
A 39-inch gaming monitor is positioned in the center of the desk, with various IT devices placed around it.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
To work properly, the USB-C cable is required to connect the USB-C port to the monitor.
It supports up to QHD@240Hz refresh rate. To work properly, a graphic card that supports DP 1.4 or HDMI 2.1 cable is required and must be purchased separately.
The graphics card is NOT included in the package.
USB-C, DP, and HDMI cables are included in the package.
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, visit LG.com.
The L-stand is crafted to save desk space and minimise dead zones, making your setup clean and efficient.
Curved gaming monitor displaying an action-adventure game in a vibrant gaming setup with purple lighting and a PC tower nearby.
Swivel
Tilt
Height
Borderless design
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Size [Inch]
39
Resolution
3440 x 1440
Panel Type
OLED
Aspect Ratio
21:9
Colour Gamut (Typ.)
DCI-P3 98.5% (CIE1976)
Brightness (Typ.) [cd/m²]
275cd/m²
Curvature
800R
Refresh Rate (Max.) [Hz]
240
Response Time
0.03ms (GtG)
Display Position Adjustments
Tilt/Height/Swivel
Size [Inch]
39
Aspect Ratio
21:9
Panel Type
OLED
Response Time
0.03ms (GtG)
Resolution
3440 x 1440
Pixel Pitch [mm]
0.266 x 0.266mm
Colour Depth (Number of Colours)
1.07B
Viewing Angle (CR≥10)
178º(R/L), 178º(U/D)
Brightness (Typ.) [cd/m²]
275cd/m²
Contrast Ratio (Typ.)
1500000:1
Colour Gamut (Typ.)
DCI-P3 98.5% (CIE1976)
Curvature
800R
Colour Gamut (Min.)
DCI-P3 94% (CIE1976)
Refresh Rate (Max.) [Hz]
240
Brightness (Min.) [cd/m²]
250cd/m²
Contrast Ratio (Min.)
1200000:1
Size [cm]
99.1
Audio In
NO
D-Sub
NO
Built-in KVM
NO
DVI-D
NO
HDMI
YES(2ea)
Daisy Chain
NO
DisplayPort
YES(1ea)
DP Version
1.4 (DSC)
Thunderbolt
NO
USB-C
YES(1ea)
Headphone out
3-pole (Sound Only)
LAN (RJ-45)
YES
Line out
NO
Mic In
NO
SPDIF out (Optical Digital Audio Out)
NO
Thunderbolt (Data Transsmission)
N/A
Thunderbolt (Power Delivery)
N/A
USB Downstream Port
YES(2ea/ver2.0)
USB Upstream Port
YES(via USB-C)
USB-C (Data Transsmission)
YES
USB-C (Power Delivery)
65W
HDR 10
YES
AMD FreeSync™
FreeSync Premium
Auto Brightness
YES
Colour Weakness
NO
Smart Energy Saving
YES
Colour Calibrated in Factory
YES
PIP
YES
PBP
2PBP
Flicker Safe
NO
NVIDIA G-Sync™
G-SYNC Compatible
HW Calibration
NO
Dynamic Action Sync
YES
Black Stabiliser
YES
Crosshair
YES
Reader Mode
YES
FPS Counter
YES
VRR
YES
Super Resolution+
NO
Dolby Vision™
NO
VESA DisplayHDR™
DisplayHDR™400 TRUE BLACK
Mini-LED Technology
NO
Nano IPS™ Technology
NO
Advanced True Wide Pol.
NO
Motion Blur Reduction Tech.
NO
OverClocking
NO
User Defined Key
YES
Auto Input Switch
NO
RGB LED Lighting
Hexagon Lighting
Camera
NO
Mic
NO
HDR Effect
YES
Display Position Adjustments
Tilt/Height/Swivel
Wall Mountable [mm]
100 x 100 mm
Bluetooth Connectivity
YES
Dolby Atmos
N/A
DTS Headphone:X
NO
Maxx Audio
NO
Rich Bass
NO
Speaker
7W x 2
Dimension in Shipping (W x H x D) [mm]
985 x 338 x 550mm
Dimension with Stand (W x H x D) [mm]
887.8 x 605.7 x 322.8mm
Dimension without Stand (W x H x D) [mm]
887.8 x 404.4 x198.0mm
Weight in Shipping [kg]
17.5kg
Weight with Stand [kg]
11.45kg
Weight without Stand [kg]
7.30kg
Product name
39GX90SA-W
Year
2025
Power Consumption (Sleep Mode)
Less than 0.5W
Power Consumption (DC Off)
Less than 0.5W
AC Input
100~240V (50/60Hz)
Type
External Power(Adapter)
Display Port
YES
DVI-D
NO
D-Sub
NO
HDMI
YES (ver 2.1)
Remote Controller
YES
Thunderbolt
NO
USB A to B
NO
USB-C
YES
Dual Controller
No
LG Calibration Studio (True Colour Pro)
No
LG UltraGear™ Studio
No
OnScreen Control (LG Screen Manager)
No
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