LG has expanded its UltraGear OLED gaming monitor lineup with two larger curved models, the 39GX90SB-W and 45GX90SB-B. Both monitors use 800R curved WOLED panels, support a 3440 x 1440 resolution, and offer refresh rates up to 240Hz for smoother gaming.
The new models are larger versions of LG’s existing 34 inch curved UltraGear OLED monitor, but they push the lineup into a more immersive size range. With 39 inch and 45 inch panels, LG is clearly targeting gamers who want a wider, more cinematic display without moving to a full living room TV setup.
OLED gaming monitors have become much more competitive over the past few years. Brands are no longer only competing on refresh rate or resolution. They are also trying to stand out with larger form factors, stronger brightness, curved panels, AI image processing, built in smart features, and better speaker systems.
LG’s new UltraGear OLED monitors focus on immersion
The main appeal of the new 39GX90SB-W and 45GX90SB-B is their size and curve. Both monitors use an 800R curvature, which is more aggressive than many older curved displays. That helps the screen wrap more closely around your field of view, especially on a large ultrawide panel.
Both monitors use MLA WOLED technology, which is designed to improve brightness and visual quality. They also reach up to 1,300 nits of peak brightness and carry VESA DisplayHDR True Black 400 certification.
| Feature | LG 39GX90SB-W | LG 45GX90SB-B |
|---|---|---|
| Display size | 39 inches | 45 inches |
| Panel type | MLA WOLED | MLA WOLED |
| Curvature | 800R | 800R |
| Resolution | 3440 x 1440 | 3440 x 1440 |
| Refresh rate | Up to 240Hz | Up to 240Hz |
| Peak brightness | Up to 1,300 nits | Up to 1,300 nits |
| Color coverage | 98.5 percent DCI-P3 | 98.5 percent DCI-P3 |
| Speakers | Dual 5W | Dual 7W |
| Operating system | webOS | webOS |
The shared 3440 x 1440 resolution means these are ultrawide gaming monitors rather than 4K displays. That resolution should still work well for gaming because it offers a wide view without being as difficult to drive as 4K at high refresh rates.
240Hz OLED panels give LG a strong gaming pitch
A 240Hz refresh rate on an OLED panel remains a strong combination for PC gaming. OLED pixels respond very quickly, which helps reduce motion blur and improves clarity in fast games.
The large size also helps with immersion in racing games, shooters, RPGs, and flight or space titles. The 45 inch version in particular will appeal to users who want a monitor that feels closer to a cockpit style gaming setup.
At the same time, the resolution may divide buyers. Some users may want more vertical pixels at this size, especially on the 45 inch model. But for gamers who prioritize frame rate and ultrawide immersion over pixel density, 3440 x 1440 still makes sense.
LG adds AI processing and webOS features
LG is also bringing smart TV style features into these monitors. Both models run webOS and use the Alpha 8 AI Processor 4K Gen 3. The monitors include AI Picture Pro and AI Sound Pro features, which are designed to improve image and audio output automatically.
This makes the new UltraGear OLED models more than simple PC displays. They can also work as entertainment screens for streaming and media playback without always relying on a connected PC or console.
The built in speaker setup is also stronger than what many gaming monitors include. The 39 inch model has dual 5W speakers, while the 45 inch model gets dual 7W speakers. Most monitor speakers are basic, so LG appears to be giving these larger displays a more complete media setup.
Connectivity covers modern desktop setups
LG has included a wide set of ports for gaming and productivity. The new monitors include HDMI, DisplayPort 1.4, USB Type-C with 65W power delivery, a LAN port, and USB Type-A ports for peripherals.
The USB-C port with 65W power delivery is useful for laptop users who want a cleaner desk setup. It can connect a compatible laptop and provide charging through one cable, though higher power laptops may still need their own charger.
The LAN port and webOS features also show that LG is treating these monitors as hybrid gaming and entertainment displays rather than simple desktop panels.
Pricing will decide how competitive these monitors become
LG has not yet announced pricing for the 39GX90SB-W and 45GX90SB-B. That will be the key detail because the OLED monitor market is already crowded, and large ultrawide OLED models are usually expensive.
The specs are strong, especially the 800R curve, 240Hz refresh rate, 1,300 nit peak brightness, AI processing, and smart features. But buyers will compare these monitors against QD-OLED models, 4K OLED screens, and other ultrawide gaming displays from Samsung, ASUS, MSI, AOC, and Alienware.
For now, LG’s new UltraGear models look like serious options for gamers who want a large curved OLED display that can also handle streaming and general entertainment. The 39 inch model may be the more balanced size, while the 45 inch version is aimed at users who want maximum immersion from a desk based setup.
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