LG UltraGear™ 45-inch OLED 240Hz WQHD Curved Smart Gaming Monitor | webOS, 0.03ms (GtG), 240Hz, DisplayHDR True Black 400

45GX90SA-B

front view of the monitor with the stand down

+15 degree side view of a tilted monitor

Key Features

45-inch WQHD (3440x1440) OLED display
240Hz refresh rate/ 0.03ms (GtG) response time
webOS
AI Picture / Dynamic Tone Mapping / AI Personalized Picture Wizard / AI Sound
VESA ClearMR 13000 / NVIDIA® G-SYNC® Compatible / AMD FreeSync™ Premium
Hexagon lighting design with space-saving L stand

STREAMING WINNING CONNECTING

Streaming to Gaming
240Hz Curved OLED Smart

Front image of the UltraGear™ 45gx90sa gaming monitor.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.

STREAMING

webOS

AI Picture

Dynamic Tone Mapping

AI Personalized Picture Wizard

AI Sound

WINNING

45-inch WQHD Curved OLED

DisplayHDR True Black 400 & DCI-P3 98.5%

0.03ms (GtG) & 240Hz

ClearMR 13000

AMD FreeSync™ Premium

NVIDIA^® G-SYNC^® Compatible

CONNECTING

USB-C (PD 65W) & HDMI 2.1

LG Switch app

Sleek design with clutter-free L stand

The webOS-powered
smart gaming monitor

Introducing the 45-inch webOS-powered smart gaming monitor with LG AI, relaxing during game breaks with effortless streaming, with numerous streaming options. Plus, access high-performance cloud gaming without a separate PC or console, all easily controlled with the remote for added convenience.

The video shows a front-facing monitor on a desk, alternating between webOS images and gameplay visuals.

*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. Separate subscriptions or payments may be required, and they are not provided (purchased separately).

*Supported services may differ by country.

*Applies only to content produced in a 21:9 aspect ratio. For streaming content, platform restrictions may apply.

*The Remote Control is included in the package.

AI Picture

Sharper characters,
enhanced realism

With AI Picture, it 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 Optimizer mode.

Dynamic Tone Mapping

Come alive with brightness and contrast

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.

Comparison video before and after applying the Dynamic Tone Mapping feature.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.

*Available only when HDR video signal is input.

AI Personalized Picture Wizard

Crafted for your taste

Pick an image you like, and AI Personalized 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.

Animated video of AI Personalized Picture Wizard function in action.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.

AI Sound

Detect, distinguish, fine-tuned 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.

Experience rich and immersive sound with AI Sound.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.

New upgrade every year for 5 years
with award-winning webOS Re:New Program

Get the benefits from the latest features and software with annual upgrades. A CES Innovation Awardee for the cybersecurity category, feel safe knowing webOS keeps your privacy and data, secure.

*webOS Re:New Program applies to LG Smart / UltraGear Smart Monitor models running webOS version 24 and above.

*webOS Re:New Program for LG Smart / UltraGear Smart Monitor models will start from webOS26.

*Updates and schedules to some features, application and services may vary by model and region.

*webOS upgrades are available up to four times over a five-year period from the product release date. Availability of features and update schedules may vary by model and region.

UltraWide view with deep black OLED

The 45-inch WQHD (3440x1440) display offers a 34% wider view than standard 16:9 screens and provides 12% larger screen than 49-inch 32:9 monitors. This WQHD OLED represents boldly darker shadows, brighter lights, and vibrant colors for gameplay in any environment.

This animated monitor shows the display growing from QHD to WQHD.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.

*The figures are calculated by multiplying the actual width and height dimensions of a 21:9 45-inch monitor (4,550㎠) and a 32:9 49-inch monitor (4,059㎠).

Planetary images appear brighter and clearer on LG OLED monitors.

The brightest OLED**

Experience stunning visuals with LG WOLED. Built on LG's OLED leadership and featuring Micro Lens Array+ (MLA+) technology, it delivers up to 37.5% brighter SDR, optimizing light efficiency and minimizing loss. It represents a standard luminosity of 275 nits (APL 100%) and a peak brightness of 1300 nits (APL 1.5%). With Delta E ≦ 2 color accuracy, it ensures vivid, true-to-life colors for immersive, precise gaming even in bright environments.

*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.

The ideal curvature 800R

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.

An animated video transitioning from a front view to a top view of a curved monitor.

*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.

Deeper black,
realistic color

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 contrast ratio, DCI-P3 98.5% (typical) color gamut, and Delta E ≦2 color accuracy ensures that colors 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.

Advanced anti-glare technology certified by triple UL

LG WOLED’s advanced anti-glare technology minimizes 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 color 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.

Racing game scene of extremely fast 0.03ms (GtG) response and a rapid 240Hz refresh rate.

0.03ms (GtG) speed,
240Hz smooth gameplay

To bring you a swift 0.03ms (GtG) response and a rapid 240Hz refresh rate, reducing reverse ghosting for crystal-clear, fluid visuals. Dive into more immersive gameplay with every frame.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.

Sharper gameplay from
VESA ClearMR 13000

With VESA ClearMR 13000 certification, experience every movement as sharp as a still image, thanks to dramatically reduced motion blur for unparalleled gaming clarity.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.

Certified with a widely adopted technology

Powered by AMD FreeSync™ Premium and NVIDIA-validated G-SYNC^® compatibility, this monitor ensures tear-free, ultra-smooth visuals and low latency, delivering unmatched gaming precision and fluidity.

*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.

Advanced gaming features

•Low Latency reduces input lag for real-time response.

•Black Stabilizer 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.

All-in-One USB-C for responsive gaming

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 45-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.

*The graphics card is NOT included in the package.

*USB-C, DP, and HDMI cables are included in the package.

This animated video shows how the LG Switch app optimizes the monitor for both gaming and everyday life.

Easy to optimize effortlessly with LG Switch

The LG Switch app optimizes your monitor for both work and life. You can easily split the display into up to 11 options, change the theme design, or launch a video call platform with a mapped hotkey. Plus, you can quickly navigate and select smart functions with the keyboard and mouse, while seamlessly switching between your PC and webOS using shortcut keys.

*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.

Clutter-free, sleek design

The clutter-free L-stand and sleek design are crafted to save desk space and minimize dead zones, making your setup clean and efficient. Experience hexagon lighting and a virtually borderless 4-sided design, paired with a fully adjustable base for swivel, tilt, and height adjustments.

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.

Key Specs

Size [Inch]
44.5
Resolution
3440 x 1440
Panel Type
OLED
Aspect Ratio
21:9
Color 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

All specs

INFO

Product name
Smart UltraGear OLED
Year
2025

DISPLAY

Aspect Ratio
21:9
Brightness (Typ.) [cd/m²]
275cd/m²
Color Depth (Number of Colors)
1.07B
Color Gamut (Typ.)
DCI-P3 98.5% (CIE1976)
Contrast Ratio (Typ.)
1500000:1
Curvature
800R
Panel Type
OLED
Refresh Rate (Max.) [Hz]
240
Resolution
3440 x 1440
Response Time
0.03ms (GtG)
Size [Inch]
44.5
Viewing Angle (CR≥10)
178º(R/L), 178º(U/D)Curvature

FEATURES

AMD FreeSync™
FreeSync Premium
Auto Brightness
YES
Black Stabilizer
YES
Color Calibrated in Factory
YES
Crosshair
YES
Dynamic Action Sync
YES
FPS Counter
YES
HDR 10
YES
HDR Effect
YES
NVIDIA G-Sync™
G-SYNC Compatible
PBP
2PBP
PIP
YES
RGB LED Lighting
Hexagon Lighting
Smart Energy Saving
YES
User Defined Key
YES
VESA DisplayHDR™
DisplayHDR™400 TRUE BLACK
VRR
YES

CONNECTIVITY

DisplayPort
YES(1ea)
DP Version
1.4 (DSC)
HDMI
YES(2ea)
Headphone out
3-pole (Sound Only)
LAN (RJ-45)
YES
USB-C
YES(1ea)
USB-C (Data Transsmission)
YES
USB-C (Power Delivery)
65W
USB Downstream Port
YES(2ea/ver2.0)
USB Upstream Port
YES(via USB-C)

POWER

AC Input
100~240V (50/60Hz)
Power Consumption (DC Off)
Less than 0.5W
Power Consumption (Sleep Mode)
Less than 0.5W
Type
External Power(Adapter)

MECHANICAL

Display Position Adjustments
Tilt/Height/Swivel
Wall Mountable [mm]
100 x 100 mm

ACCESSORY

Display Port
YES
HDMI
YES (ver 2.1)
Remote Controller
YES
USB-C
YES

SOUND

Bluetooth Connectivity
YES
Speaker
7W x 2

DIMENSIONS/WEIGHTS

Dimension without Stand (W x H x D) [mm]
992.7 x 457 x 218mm
Dimension with Stand (W x H x D) [mm]
992.7 x 661.7 x 338.6mm(UP) / 992.7 x 541.7 x 338.6mm(Down)
Weight without Stand [kg]
8.9Kg
Weight with Stand [kg]
13.5Kg