The LG 39GX90SA-W Ultragear Review: The All-in-One OLED Gaming Powerhouse

For years, PC gamers have faced a choice: invest in a top-tier gaming monitor for blistering performance, and then a separate high-quality TV for media consumption. LG seems determined to obliterate that compromise with the LG 39GX90SA-W Ultragear. This isn't just another fast gaming panel; it's a fusion of cutting-edge OLED technology, a console-friendly 39-inch size, a dramatic 800R curve, and the smart TV platform of LG's acclaimed sets.

But does this ambitious combination truly deliver a best-of-both-worlds experience? After spending significant time with this monitor, the answer is a resounding, albeit nuanced, yes. Let's dive into why the 39GX90SA-W might just be the most compelling high-end gaming display on the market.

First Impressions: A Statement Piece

Right out of the box, the LG 39GX90SA-W makes a statement. The 39-inch diagonal, combined with a 21:9 ultrawide aspect ratio and a pronounced 800R curvature, is immediately immersive. This isn't a gentle curve; it wraps around your field of vision, promising a cinematic experience before you even power it on. The build quality is premium, with a minimalist stand that offers solid stability and sufficient adjustability.

The Main Event: OLED Performance Unleashed

This is where the monitor truly earns its keep. The OLED panel is, in a word, stunning.

Pixel-Perfect Contrast and Blacks: As with all OLED technology, each pixel is self-lit and can be turned off completely. This results in an infinite contrast ratio, with blacks that are truly, deeply black. In dark horror games or space-faring adventures, this adds a layer of depth and realism that LCD monitors simply cannot match. Shadows are perfectly detailed, with no annoying backlight bloom.
Vivid Color and HDR Brilliance: Covering 98.5% of the DCI-P3 color gamut, colors pop with incredible vibrance and accuracy. Combined with the VESA DisplayHDR True Black 400 certification, highlights are exceptionally bright and specular details—like sunlight glinting off a car or a spell explosion—are breathtaking. While its peak brightness isn't as high as some mini-LED flagships, the perfect black levels make the HDR impact more dramatic and nuanced in many scenes.
Blistering Speed: 240Hz and 0.03ms Response: This is the heart of its gaming prowess. A 240Hz refresh rate is buttery smooth, making fast-paced shooters and racing games feel incredibly fluid. More importantly, OLED’s near-instantaneous pixel response time—a claimed 0.03ms (GtG)—eliminates ghosting and smearing almost entirely. The motion clarity is arguably the best you can get without moving to a strobed backlight mode, making fast-moving objects incredibly sharp.

For those comparing options, this OLED performance places it in direct competition with monitors like the Samsung Odyssey G93SC, which we've discussed in a separate comparison. You can check out that detailed analysis here: Review: Samsung 240Hz Odyssey G93SC.

Gaming Features: Tear-Free and Responsive

LG has equipped this monitor with everything a serious gamer needs. It’s both NVIDIA G-SYNC Compatible and AMD FreeSync Premium certified, ensuring buttery-smooth, tear-free gameplay whether you’re team Green or Red. This variable refresh rate (VRR) support works flawlessly across PCs and next-gen consoles.

The on-screen display (OSD) is packed with gaming utilities:

Black Stabilizer: Brightens dark areas without overexposing the whole screen, perfect for spotting campers in shadowy corners.
Crosshair: Overlays a static crosshair for those tricky hip-fire moments.
FPS Counter: Keep track of your performance without needing third-party software.

The Smart Advantage: webOS Transforms the Experience

This is the killer feature that sets the 39GX90SA-W apart. The inclusion of webOS 24 transforms it from a mere monitor into a smart entertainment hub.

All Your Streaming Apps: You get instant, built-in access to Netflix, Disney+, Prime Video, YouTube, and more. The interface is snappy and familiar to anyone who has used an LG TV.
Cloud Gaming Built-In: This is a game-changer. You can launch NVIDIA GeForce NOW, Amazon Luna, or Blacknut directly from the home screen. No PC or console required? Just a controller, and you're playing AAA games in stunning OLED quality.
AI-Powered Enhancements: Features like AI Picture Pro and AI Sound Pro analyze the content you're watching or playing and automatically optimize the picture and audio settings for a more immersive experience.

Design and Usability: Form Meets Function

The 800R curve is a point of contention for some, but for a screen of this size, it’s highly effective. It ensures that the edges of the screen are the same distance from your eyes as the center, reducing eye strain and increasing immersion. The anti-glare coating does an excellent job of minimizing reflections, which is crucial for maintaining those deep blacks in a well-lit room.

Connectivity is comprehensive, featuring multiple HDMI 2.1 ports, a DisplayPort, and a USB Type-C port that supports video input, data, and power delivery—perfect for a single-cable connection to a laptop.

The Verdict: Who Is This Monitor For?

The LG 39GX90SA-W Ultragear is a spectacular achievement. It successfully merges the best attributes of a premium gaming monitor with the convenience and smarts of a high-end television.

It's the ideal choice for:

The gamer who wants one screen to rule them all—for competitive gaming, immersive single-player experiences, and media consumption.
Console gamers (PS5, Xbox Series X) who want a large, cinematic, and incredibly responsive display.
Anyone who values perfect black levels and motion clarity above all else.

The primary consideration, as with any OLED, is the potential risk of burn-in, though LG includes robust OLED Panel Care features and a 2-year warranty that covers the panel for peace of mind.

Ready to experience the ultimate all-in-one OLED gaming display?

If the blend of blistering 240Hz speed, perfect OLED contrast, and the convenience of smart webOS has convinced you, the LG 39GX90SA-W is waiting. Click here to check the latest price and availability on Amazon: Check Price on Amazon

Pros:

Stunning OLED picture quality with infinite contrast
Exceptional 240Hz motion clarity and near-instant response
webOS platform is a huge convenience for streaming and cloud gaming
Effective 800R curve enhances immersion
Comprehensive G-SYNC and FreeSync Premium support

Cons:

OLED burn-in, while mitigated, remains a long-term consideration for some users
Peak HDR brightness is lower than some high-end mini-LED alternatives
The pronounced curve may not be for everyone, especially for productivity tasks.