This article covers LG ゲーミングモニター UltraGear evo AI 45GX950B-B 45インチ 5K2K(5120×2160).

Overview

The LG 45GX950B-B is the flagship model of LG's UltraGear evo AI gaming monitor lineup, featuring a massive 44.5-inch curved OLED panel with Micro Lens Array (MLA) technology. It offers an ultra-wide 21:9 aspect ratio and a stunning 5K2K (5120×2160) resolution that wraps around your peripheral vision thanks to the 800R curvature. In its native resolution, it runs at 165Hz, but a dual-mode switch drops the resolution to 2560×1080 while boosting the refresh rate to 330Hz — ideal for competitive FPS games. The 0.03ms gray-to-gray response time virtually eliminates motion blur, and the OLED panel delivers true blacks with a 1,500,000:1 contrast ratio and peak brightness of 1,300 cd/m². Connectivity is future-proof with DisplayPort 2.1 (UHBR20), two HDMI 2.1 ports, and a USB-C port supporting 90W Power Delivery and DisplayPort Alt Mode. An AI-based picture optimization engine automatically adjusts settings per game, making it one of the most advanced gaming monitors on the market as of mid-2026. Priced around ¥270,000, it competes directly with Dell's Alienware AW3425DW and ASUS's ROG Swift PG45UQ, but offers a higher resolution and more versatile refresh rate options.

Connectivity & Compatibility

The monitor includes one DisplayPort 2.1 (UHBR20) — capable of driving 5K2K at 165Hz without compression — two HDMI 2.1 ports (48 Gbps each), and a USB-C port that supports DisplayPort Alt Mode and delivers up to 90W of power to connected devices. Two USB-A 3.0 downstream ports let you connect peripherals like a mouse, keyboard, or headset dongle directly to the monitor, reducing cable clutter to your PC. The 800R curvature is designed for a viewing distance of 50–80 cm, providing an immersive wrap-around effect. VESA 100×100 mm mounting is supported, so you can attach it to a monitor arm for ergonomic adjustment. Note that due to the 44.5-inch size, you'll need a desk with at least 100 cm width and 70 cm depth for comfortable placement. The monitor also features a built-in KVM function via USB-C, allowing you to switch between two connected computers using a single set of peripherals.

Product Info

Released in early 2025, the LG 45GX950B-B is positioned at the very top of LG's gaming monitor lineup, with a Japanese retail price of approximately ¥269,800 (tax included). It comes with a DisplayPort cable, an HDMI cable, a USB-C cable, a power cable, a remote control, and a sturdy stand. The warranty is one year from the manufacturer (proof of purchase required). It is available through LG's official online store, major electronics retailers in Japan (Bic Camera, Yodobashi Camera, etc.), and online marketplaces like . Given the combination of OLED, 5K2K resolution, high refresh rate, and advanced connectivity, this monitor offers compelling value for its price tier, especially since few competitors offer the same feature set.

Best Use Cases

First, gamers seeking the ultimate immersive experience: racing games, flight sims, and open-world RPGs look stunning on the 21:9 OLED panel. The dual-mode makes it suitable for both visual-rich titles and competitive shooters. However, you'll need a top-tier GPU (RTX 4090 or equivalent) to drive this resolution at high frame rates. Second, content creators: the wide DCI-P3 color gamut (98.5%) and low ΔE (≤2) ensure accurate color reproduction for video editing, photo retouching, and graphic design. Just be aware of OLED burn-in risk for static UI elements. Third, multi-device users who want to declutter their desk: the USB-C port with 90W PD acts as a single-cable solution for laptop charging and video output, and the KVM feature lets you easily switch between a work laptop and a gaming desktop. If your budget is limited or you prefer traditional 16:9 screens, a standard 4K 144Hz monitor might be a more practical choice.

Product Disclosure (Amazon)

  • Manufacturer: AMD
  • Seller: Reg shop
  • Fulfilled by: Reg shop
  • ASIN: B07KY8HK5J
  • Note: This article covers a manufacturer-made product based on Amazon listing details.