LG’s Bigger Ultrawide OLED Gaming Monitors Explained
LG’s 39GX90SB and 45GX90SB Ultragear models are ultrawide OLED gaming monitors that pair 800R curvature, 3440x1440 resolution, and 240Hz refresh rates with TV-class smart features and extreme peak brightness to redefine premium PC gaming displays. Building on the 34-inch 34GX90SB-W, the new 39-inch and 45-inch variants keep the 21:9 3440x1440 resolution while scaling up immersion with larger panels and the same tight 800R curve. Both use MLA (Micro Lens Array) WOLED technology to push peak brightness up to 1,300 nits and deliver DisplayHDR True Black 400 certification with a quoted 98.5% DCI-P3 color gamut. LG’s Alpha 8 AI Processor 4K Gen 3 and webOS turn these into full smart gaming screens, handling streaming apps and cloud gaming without a PC. For competitive players and cinematic AAA fans, LG is clearly steering ultrawide OLED toward a new brightness and size class.
Specs Focus: 3440x1440 at 240Hz and 1,300 Nits
At the core of LG’s push is a set of specs that aim to reset expectations for an ultrawide OLED gaming monitor. Like the 34GX90SB-W, both the 39GX90SB-W and 45GX90SB-B offer a 3440x1440 resolution gaming experience at up to 240Hz, supported by OLED’s near-instant gray-to-gray response. According to Wccftech’s report on the new models, these panels reach a peak brightness of 1,300 nits while maintaining VESA DisplayHDR True Black 400 certification and 98.5% DCI-P3 coverage. MLA WOLED improves brightness by directing more light toward the viewer, an approach LG first highlighted with MLA+ on the 34-inch model. Combined with variable refresh rate, G-Sync and FreeSync Premium Pro support on the 34-inch sibling, and low response times typical of OLED, the 39- and 45-inch screens look built for fast esports titles without sacrificing HDR punch for single-player blockbusters.
Immersion, Curvature, and Use Cases From Esports to AAA
The move to 39- and 45-inch sizes with an 800R curve pushes immersion further than the already enveloping 34-inch Ultragear OLED. An 800R curvature means the display’s radius matches an 0.8-meter circle, wrapping more of the user’s field of view than gentler curves and pulling HUD elements toward the center of vision. For esports, this wide, curved canvas can keep peripheral information visible without excessive head movement, while the 21:9 aspect ratio suits racing and flight sims with more horizontal real estate. For story-driven AAA titles, deep blacks, high contrast, and the extended color of WOLED give scenes a more cinematic feel in ultrawide formats. With speakers rated at 5W x2 on the 39-inch and 7W x2 on the 45-inch model, plus AI Sound Pro, LG is nudging these monitors toward all-in-one battle stations rather than simple PC-only peripherals.
Smart TV DNA: webOS, Cloud Gaming, and Connectivity
LG is clearly importing its TV playbook into the ultrawide OLED gaming monitor segment. The 34GX90SB-W already ships with webOS, LG Channels, and support for major streaming services like Netflix, Disney+, and Apple TV, along with cloud gaming apps including NVIDIA GeForce NOW, Xbox Cloud Gaming, and Amazon Luna. The 39GX90SB and 45GX90SB continue this approach, running webOS with the Alpha 8 AI Processor 4K Gen 3, plus AI Picture Pro and AI Sound Pro for automatic tuning. Connectivity is similarly TV-like: HDMI 2.1, DisplayPort 1.4, USB Type-C with up to 65W power delivery, USB-A ports for peripherals, and a LAN port for stable streaming. On the 34-inch model, LG even includes a remote for what it calls “quick, hassle-free access” to apps, reinforcing the idea that these 240Hz OLED monitors are also full-featured entertainment hubs.
Competitive Landscape: Pressuring ASUS ROG and Other Premium OLEDs
By extending its ultrawide OLED range from 34 inches up to 45 inches while holding onto 240Hz refresh rates and hitting 1,300 nits, LG is taking direct aim at premium rivals like ASUS ROG Swift OLED. ASUS and others already sell fast 34-inch-plus ultrawides, but LG’s formula—an aggressive 800R curve, 3440x1440 resolution gaming, DisplayHDR True Black 400, and integrated smart TV features—creates pressure on competitors to add similar brightness and functionality. The 34GX90SB-W’s MSRP of USD 999.99 (approx. RM4,700) signals LG’s intent to stay in the high-end while still undercutting some larger OLED TV options as desk monitors. With multiple sizes now offering a consistent spec sheet, LG is building an OLED ecosystem that can scale with players’ desks and budgets, and that could force future ultrawide releases from ASUS, MSI, and others to match or exceed LG’s brightness and smart feature set.
