Overview

  • The 240Hz OLED Smart Gaming Monitor that’s Ahead of the (800R) Curve
    The huge 45” WQHD OLED with a steep 800R curve and 1300-nit peak brightness pulls you deep into the action, while a 240Hz refresh rate and 0.03ms response time keep gameplay insanely fast and smooth. Plus, LG’s webOS lets you stream your favorites and cloud game—all from one epic screen.
  • Up to 240Hz & 0.03ms – Outrageous OLED Gaming Speed
    Game at the speed of OLED with an ultra-fast 240Hz and near instantaneous 0.03ms (GtG) response time. The faster speed lets you respond quickly to opponents and enjoy smoother scenes with less lag or ghosting.
  • Your Favorite Streaming Services Plus Cloud Gaming
    Thanks to webOS24, find your favorites fast with built-in access to Netflix, Prime Video, the Apple TV app, Disney+, HBO Max. And over 300 free LG Channels with everything from comedy to movies to sports. Game without a PC or console! Connect to your favorite cloud gaming services such as NVIDIA GeForce NOW, Amazon Luna, and Blacknut directly from the webOS home screen.²
  • Ultimate Frame Sync: FreeSync Premium Pro & G-SYNC Compatible
    Say goodbye to screen tearing and stutter. With AMD FreeSync Premium Pro and NVIDIA G-SYNC compatibility, this OLED monitor delivers ultra-smooth, tear-free visuals, giving you perfect frame sync across PC and next-gen console gaming.
  • Bright Picture. Deep Blacks, Brilliant Detail: OLED Gaming FTW
    Get lost in vivid visuals with OLED technology, delivering exceptional brightness, up to 98.5% of DCI-P3 color coverage, a 1.5M:1 contrast ratio, and DisplayHDR True Black 400. Every gaming scene pops with deep blacks, brilliant highlights, and cinematic color.
  • The 800R Curve: Surround Yourself in the Action
    See and feel the action all around you with the dramatic 800R curve. This steep curvature extends your periphery, pulling you deeper into the game and making the action more intense.
  • Low Glare, More Focus: Play Without Distractions
    UL-verified “Flicker-free Display”, “Discomfort Glare Free” and “Low Blue Light Hardware Solution Platinum”, this OLED display keeps your view crisp and colors bold. With advanced anti-glare tech minimizing reflections, you get distraction-free clarity—so you can stay focused and dominate in any lighting.
  • webOS Gaming: AI Tools Customize Your Gaming Experience
    Experience enhanced gaming in webOS with AI tools. Dynamic Tone Mapping and AI Picture sharpen visuals, while AI Personalized Picture Wizard customizes settings to your taste. AI Sound completes the package, delivering precision-tuned audio for every game or stream.³
  • Unlock Your Potential with Advanced Gaming Features
    Dynamic Action Sync reduces input lag for real-time response. Black Stabilizer brightens dark scenes to see what’s hidden. FPS Counter shows your real-time frame rate. Crosshair enhances precision for deadly accuracy.
  • OLED Protection: 2-Year Limited Warranty & Panel Care Tools
    Rest easy knowing your OLED monitor is built to last. The 2-year limited warranty covers key components, including the OLED panel. And OLED Care tools such as pixel cleaning keep your display sharp, for reliable top-tier performance. Please see Warranty Information on this page for all warranty details.
  • Serious Connectivity for Serious Gamers
    For next gen console gaming or PC gaming, with HDMI 2.1, DisplayPort 1.4 and USB Type-C (65W power delivery), UltraGear’s versatile connectivity enables high-resolution graphics, and fast, fluid gaming.⁴
  • Customize Your Screen View with the Switch App
    The Switch app transforms your screen into a multitasking hub for work, gaming, and streaming. Effortlessly split the screen into up to 6 sections, customize display layouts, or launch video calls with a single hotkey. Navigate smart features with ease and switch seamlessly between your PC and the built-in webOS streaming platform, all with intuitive shortcuts.⁵
  • Battlestation Upgrade Adjustable to Gamer Specs
    Go big with the virtually borderless 45” OLED screen. UltraGear’s sleek, slim design offers adjustable height, tilt, and swivel control for your ideal view, while RGB hexagonal backlighting sets the mood for your battlestation.

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Specifications

Capacity & configuration

Display Type
OLED
Stand Type
Adjustable height stand

Dimensions & weight

Product Name
UltraGear 45" OLED QHD 240Hz 0.03ms G-Sync/FreeSync Premium Pro Smart Gaming Monitor with DisplayHDR 400 TRUE BLACK
Product Height Without Stand
21.3 inches
Product Width
39.1 inches
Product Depth Without Stand
13.3 inches
Product Weight
29.8 pounds
Maximum Adjustable Height
26.1 inches
Product Depth (With Stand)
13.3 inches

Features

Brand
LG
Color
Black
Refresh Rate
240Hz
Maximum Resolution
3440 x 1440
Native Resolution
3440 x 1440
Contrast Ratio
1,500,000:1
Response Time
0.03 milliseconds
Synchronization Technology
G-SYNC Compatible (NVIDIA Adaptive Sync)
Aspect Ratio
21:9
Display Contour
Curved
Brightness
275 candela per square meter
Screen Size
44.5 inches
High Dynamic Range (HDR)
Yes
High Dynamic Range Format
VESA Certified DisplayHDR 400 True Black
Horizontal Viewing Angle
178 degrees
Vertical Viewing Angle
178 degrees
On-Screen Display Languages
English
Display Surface
Anti-glare
Color Gamut (NTSC)
98.5 percent
Number of DisplayPort Inputs (Total)
1
Number of HDMI Inputs (Total)
2
Display Connector(s)
1 x DisplayPort 1.4
Number of USB Ports (Total)
3
USB Ports
1 x USB-C
Headphone Jack
Yes
Wall Mountable
Yes
VESA Wall Mount Standard
100mm x 100mm
Stand Ergonomics
Tilt
Anti-Glare
Yes
Eye Relief Features
Anti-glare
Built-In Webcam
No
Integrated Speaker(s)
Yes
Smart Capable
Yes
ENERGY STAR Certified
No
Operating System Compatibility
Not Applicable
UPC
195174115114

Power & warranty

Model Number
45GX90SA-B
Warranty - Parts
2-Years
Warranty - Labor
2-Years

Warranty & protection

Included manufacturer warranty

See manufacturer documentation.

Register your product with the manufacturer within 30 days of delivery.

Warranty service

Manufacturer warranty claims are handled by the manufacturer. We are happy to help you find the right contact: (888) 419-6820.

Customer reviews

Write a review
MIKHAILROct 27, 2026 · Verified purchase ★★★★★

good buy - great product, easy to set up, great quality, size is bigger in person

LUISROct 18, 2026 · Verified purchase ★★★★★

Amazing display - Great amount of workspace and the graphics are amazing

MARLONHOct 17, 2026 · Verified purchase ★★★★★

Great Monitor - I picked it over the Samsung 49" curve monitor. This monitor has good width and height and not subject to burn-ins.

JOSHUAMOct 16, 2026 · Verified purchase ★★★★★

Great monitor - Good picture, fast response time. Big picture unlike the 49 inch monitor

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Questions & answers

Ask a question

Email [email protected] or call (888) 419-6820 during business hours.

Free U.S. shippingOn every order. Leaves our store in 1–2 business days, arrives in 3–5 business days.
Free returns for 30 daysNo restocking fee. We email you a prepaid return label.
We can install it tooOptional in-home delivery, installation and haul-away on large appliances.
Talk to our team(888) 419-6820 · Mon–Sat