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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesLG’s UltraGear OLED 39GX90SA is no longer merely a pre-CES 2025 teaser. It is a released 39-inch curved OLED gaming monitor combining a 3440 × 1440 ultrawide panel, 240Hz refresh rate, USB-C connectivity and LG’s webOS 24 smart-monitor platform. LG announced a US MSRP of $1,599 in April 2025, although that launch price should not be treated as the current August 2026 street price.
What LG announced before CES 2025
The 39GX90SA was introduced as the smart-gaming member of LG’s UltraGear GX9 family. LG’s CES 2025 announcement highlighted its 39-inch 21:9 OLED display, aggressive 800R curve, USB-C connectivity, ergonomic L-shaped stand and built-in webOS features.
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It should not be confused with LG’s separate 45-inch 5K2K OLED monitors. The 39GX90SA is a 3440 × 1440 WQHD ultrawide, not a 5120 × 2160 display.
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| Feature | Specification |
|---|---|
| Display | 39-inch-class OLED |
| Aspect ratio | 21:9 |
| Resolution | 3440 × 1440 |
| Refresh rate | Up to 240Hz |
| Curvature | 800R |
| Response time | 0.03ms GtG, claimed by LG |
| HDR | DisplayHDR True Black 400 |
| VRR | AMD FreeSync Premium and Nvidia G-Sync Compatible |
| Smart platform | webOS 24 |
| USB-C | Up to 65W power delivery |
| Networking | Wi-Fi and Gigabit Ethernet, according to LG Canada |
LG’s regional specifications also list two HDMI inputs, one DisplayPort 1.4 with DSC, two USB-A downstream ports, a headphone output, and height, tilt and swivel adjustment. Port configurations can vary by region and model suffix.
#1 Best Overall
- The 240Hz OLED Gaming Monitor That’s Ahead of the (800R) Curve — 39" WQHD OLED with a steep 800R curve and up to 1300-nit (APL 1.5%) peak brightness pulls you into the action; 240Hz and 0.03ms (GtG) keep gameplay fast and fluid.
- Up to 240Hz & 0.03ms – Outrageous OLED Gaming Speed — Respond faster and track targets with near-instant pixel transitions that cut lag and ghosting for competitive play.
- Ultimate Frame Sync: FreeSync Premium Pro & G-SYNC Compatible — Tear-free, stutter-free visuals across PC and next-gen consoles for consistently smooth frames.
- Bright Picture, Deep Blacks, Brilliant Detail — OLED delivers up to 98.5% DCI-P3, 1.5M:1 contrast, and DisplayHDR True Black 400 for cinematic color and shadow detail.
- The 800R Curve: Surround Yourself in the Action — A dramatic 800R wrap enhances peripheral vision for deeper immersion in every scene.
What webOS adds to a gaming monitor
webOS lets the monitor function independently of a connected PC for supported entertainment and cloud-gaming applications. LG describes access to services including YouTube, Prime Video and Nvidia GeForce Now, though app availability, account requirements and subscriptions depend on the country and service.
This makes the 39GX90SA more versatile than a conventional gaming monitor: users can stream video or access supported cloud games without a separate streaming box. It does not make the monitor a general-purpose gaming computer. Native PC games still require a PC, console or compatible cloud-gaming service, and internet access is required for webOS services.
Gaming features and trade-offs
The 240Hz maximum refresh rate suits high-frame-rate competitive games, while OLED pixels provide per-pixel black levels and very high stated contrast. LG’s 0.03ms gray-to-gray figure is a manufacturer claim, not an independent measurement.
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Rank #2
- The World’s First 39" 5K2K OLED Gaming Monitor - This 39-inch 5K2K (5120×2160) UltraGear hits the sweet spot of size, resolution, and speed. The wide 21:9 format and 1500R curve expand your field of view, while the dense pixel count delivers crisp detail across every scene in the games you love.
- AI Upscaling to 5K2K—No GPU Upgrade Required - UltraGear evo’s built-in processor uses AI Upscaling to enhance content toward the display’s 5K2K resolution. It analyzes the source signal to improve detail and clarity—helping games and video look sharper without requiring a GPU upgrade.
- Next-Gen Brilliance with 4th Gen RGB Tandem OLED - 4th Gen Primary RGB Tandem OLED delivers up to 335 nits typical brightness with improved power efficiency. Its advanced 4-stack RGB structure enhances contrast, sharpens detail, and keeps color precise across every frame.
- UL-Verified for a "Perfect" Visual Experience - Perfect Black: UL-verified Perfect Black delivers true black levels to enhance perceived brightness and contrast, whether it's bright or dark around you. Perfect Color and 100% Color Fidelity- UL verified to deliver accurate color expression even under varying lighting conditions, from low light to bright ambient environments. UL-verified Perfect Reproduction ensures game content is faithfully rendered on screen, preserving intended color and detail. This certification reflects real-world content accuracy.
- Deeper Detail with VESA DisplayHDR True Black 500 - VESA DisplayHDR True Black 500 reveals rich blacks and nuanced shadow detail—even in dark scenes. Combined with a 1.85M:1 contrast ratio, up to 99.5% (typical) DCI-P3 color, and Delta E≤2 accuracy, visuals appear vivid, precise, and true to the creator’s intent.
The monitor supports variable refresh through AMD FreeSync Premium and Nvidia G-Sync Compatibility. Its 3440 × 1440 resolution is also less demanding to render at high frame rates than 4K or 5K2K ultrawide resolutions.
LG lists a peak HDR brightness of 1,300 cd/m² at a 1.5% average picture level. That is a small highlight window, not sustained or full-screen brightness. The Canadian specification lists up to 98.5% DCI-P3 coverage and 275 cd/m² typical SDR brightness in the US announcement, while regional sheets may use different wording.
Connectivity for laptops and multi-device setups
USB-C can carry video and data while delivering up to 65W to a connected laptop. That is convenient for ordinary productivity laptops, but may be insufficient for some high-performance models under sustained load.
Rank #3
- World's First 5K2K OLED Gaming Monitor - Gaming like never before with the world's first 5K2K WUHD (5120 x 2160) resolution on a massive 45” curved OLED screen. This unparalleled clarity on an ultra-wide aspect ratio pulls you deep into the action, surrounding you with stunning visuals and astounding detail. Perfect for epic battles or cinematic adventures, this UltraGear is your window to ultimate gaming perfection.
- 125 PPI: Sharp Text Clarity with Reduced Color Fringe - Designed with an updated subpixel layout, the 5K2K UltraGear OLED screen reduces color fringing for sharper, clearer text. 125 pixels per inch (PPI) is perfect for both work and play: crisp text clarity paired with bold, vivid visuals.
- Bright 45" OLED Picture: Up to 1300 nits with Deep Blacks and Brilliant Color - Experience bright OLED visuals at up to 1300 nits peak brightness. With color 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.
- Dual Mode: 5K2K 165Hz or WFHD at 330Hz - Dual Mode lets you take control of your gaming experience. Enjoy graphically stunning story-driven adventures in 5K/WUHD at up to 165Hz, immersing yourself in epic visuals and rich detail. Or press the hotkey to switch to Wide Full HD at an electrifying 330Hz for ultra-responsive gameplay in FPS, MOBA, or racing titles.
- 0.03ms (GtG): Astounding OLED Speed - Play with a near-instantaneous 0.03ms response time, which minimizes ghosting for gaming visuals that are sharp, clear and buttery smooth.
Picture-by-picture and picture-in-picture modes make the monitor useful for combining a desktop, laptop or other source. However, buyers should verify the exact regional port layout before ordering. Early reporting from Notebookcheck described a second DisplayPort, while LG Canada’s later product page lists one DisplayPort 1.4. The safest conclusion is that DisplayPort count may differ by market or documentation and should not be generalized.
39GX90SA versus the 39GS95QE
The 39GS95QE is the most relevant comparison. Available secondary reporting indicates that the 39GX90SA appears to use the same fundamental 39-inch, 800R, 3440 × 1440, 240Hz OLED platform. That is a reported hardware relationship, not an explicit LG confirmation.
The clearest additions are:
- Built-in webOS 24 smart-monitor functionality.
- USB-C connectivity with up to 65W power delivery.
- Networking hardware and other revised connectivity options.
There is no evidence in the supplied specifications that the 39GX90SA represents a major panel-generation jump in image quality. Its appeal is primarily the combination of familiar high-refresh OLED hardware with smart features and improved device connectivity.
Rank #4
- 32" 4K UHD Glossy OLED Display - Experience ultra-sharp visuals and lifelike color on a stunning 32-inch 4K UHD (3840 x 2160) glossy OLED display. Every detail pops with depth and vibrancy, bringing your favorite games and content to life.
- Bright OLED Gaming - This UltraGear features Micro Lens Array+ technology. So with a typical brightness of 275 nits, this monitor is brighter than previous UltraGear OLED gaming displays and has improved viewing angles.
- VESA DisplayHDR True Black 400 & 1.5M:1 Contrast Ratio - VESA DisplayHDR True Black 400 certified with upt to DCI-P3 98.5% color gamut means this monitor meets industry standards for brightness as well as deep, rich black color expression. With a 1.5M:1 contrast ration, the benefit for gaming impeccable color and image detail in dark scenes for a stunning visual experience.
- 32" UHD OLED Brilliance with 165Hz of Game-Changing Speed - Experience ultra-smooth, tear-free gameplay with up to 165Hz on a bright 32” Glossy UHD OLED display. React instantly, spot every detail, and outpace your opponents in every frame with outrageous speed and clarity.
- Leave Lag Behind with 0.03ms Response Time - Enjoy smoother scenes with less lag or ghosting thanks to LG UltraGear OLED's nearly instantaneous 0.03ms (GtG) response time.
The 1440p caveat
A 39-inch 3440 × 1440 display offers a wide gaming view without the GPU burden of 5K2K, but it has lower pixel density than a 4K monitor or a 5K2K ultrawide. Text and fine desktop elements will therefore look less sharp, especially at close viewing distances.
The 800R curve can make games feel more enveloping, but it is also unusually aggressive for productivity. Buyers should consider desk depth, viewing distance and whether curved geometry suits their document, design or spreadsheet work.
Launch timeline and pricing
- Before CES 2025: LG provided specifications and presented the monitor as part of its UltraGear GX9 family.
- February 25, 2025: Contemporary reporting identified Japan as the first launch market.
- April 3, 2025: LG announced US pricing and availability at a $1,599 MSRP.
- April 2025: Reporting documented availability in the US, UK and Eurozone.
Reported launch prices included ¥249,800 in Japan, €1,499 in Europe and £1,299.99 in the UK. These are historical launch figures, not verified current prices. LG’s US announcement also listed the 34GX90SA at $1,399 and the 45GX90SA at $1,699.
Who should consider it?
- Gamers who want a large 21:9 OLED display at 240Hz.
- Buyers who prefer 3440 × 1440 to the heavier rendering demands of 5K2K.
- Users who will actually use webOS streaming or cloud gaming.
- Laptop users who benefit from one USB-C connection and up to 65W charging.
- Players who prefer an immersive 800R curve.
Who should skip it?
- Buyers prioritizing maximum text sharpness should consider 4K or 5K2K alternatives.
- Owners of a good streaming box may gain little from webOS.
- Laptop users requiring more than 65W charging should plan for a separate charger.
- Those seeking the cheapest 240Hz OLED should compare discounted non-smart models such as the 39GS95QE.
- Productivity-heavy users should weigh OLED image-retention precautions and the unusually deep curve.
LG’s 45GX950A and 45GX990A are more suitable for buyers who prioritize 5120 × 2160 resolution, while the 34GX90SA offers the same smart-monitor direction in a smaller format. The 45GX90SA provides a larger 1440p canvas but needs more desk space.
Verdict
The LG UltraGear OLED 39GX90SA is best understood as a smart, connected version of LG’s high-refresh 39-inch OLED ultrawide concept—not as a 5K2K monitor or a replacement for a gaming PC. Its distinguishing feature is the combination of 240Hz OLED gaming, USB-C and built-in webOS. That makes it compelling for buyers who want streaming and cloud gaming built into the display, but less compelling for anyone who does not need those features or who prioritizes pixel density above convenience.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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