LG 45GX990A

LG 45GX990A Review & Specifications

45GX990A by LG from the UltraGear series, is a 44.50″ OLED monitor with a resolution of 5120 × 2160 pixels and a refresh rate of up to 165 Hz. It supports a 10-bit color depth (true 10-bit panel without FRC), displays up to 1073741824 colors, and offers the following color space coverage: 98.50% DCI-P3 . The panel delivers None nits of brightness, and can reach up to 1300 nits peak, has a static contrast ratio of 1500000:1, a response time of 0.03 ms. The panel is manufactured by LG Display. It has a pixel density of 124 PPI, with viewing angles of 178 ° (degrees)° horizontal and 178 ° (degrees)° vertical. This is a curved screen with a 900R curvature. It has a Anti-glare/Matte screen coating and uses self-emissive OLED technology, which does not require a backlight.

General Work Usage

The LG 45GX990A earns a solid 80.0% work usage rating, indicating reliable performance in most productivity scenarios such as office tasks, spreadsheets, and research work. It utilizes an OLED panel offering high visual fidelity and rich contrast. While these panels excel in contrast, black levels, and color richness, they are prone to issues such as burn-in when static elements remain on screen for extended periods — a common scenario in office work with persistent UI components. Additionally, OLED panels may struggle to maintain full-screen brightness over time and can exhibit lower peak brightness compared to high-end IPS displays, reducing comfort in well-lit work environments. The monitor’s extremely high resolution of 5120×2160 provides an abundance of screen real estate, ideal for multitasking, side-by-side window use, or detailed content creation. The pixel density of 124 ppi provides adequately crisp text without requiring scaling, though pixel edges may become noticeable when sitting close or working with fine content. With a brightness level of None nits, this monitor may appear dim in bright office settings, making it less suitable for environments with strong ambient light.

The LG 45GX990A has color space coverage of: 98.50% DCI-P3 , which gives this monitor exceptional color gamut coverage, making it a top-tier choice for professionals working in color-sensitive applications such as photo editing (Photoshop, Lightroom), video grading, or design production. Colors appear rich, consistent, and accurate across supported spaces. In addition, it features a true 10-bit panel, delivering extremely smooth gradients, precise tonal transitions, and a wide dynamic range. This combination ensures the highest standard for professional visual work.

The work performance-per-price score of 15.7% indicates that this monitor does not offer strong value for professional productivity use. With a respectable 80.0% work suitability score, it may still be a reasonable option for users seeking reliability over savings.

Gaming and Media Usage

The LG 45GX990A achieves an outstanding 89.4% entertainment score, making it an excellent choice for immersive gaming, high-quality video playback, and fast-paced visual experiences. It utilizes an OLED panel — a top-tier choice for gaming and media consumption. OLED technology delivers near-instantaneous pixel response, infinite contrast, and rich color vibrancy, making it ideal for cinematic content and fast-paced gameplay. However, OLED panels come with a few quirks: they are susceptible to burn-in from static HUD elements, may suffer from Automatic Brightness Limiting (ABL) in full-brightness scenes, and can have lower sustained brightness compared to premium LCDs — especially in well-lit environments. The monitor’s extremely high resolution of 5120×2160 delivers incredibly sharp visuals and exceptional detail, ideal for immersive single-player games and 4K media playback. However, running modern titles at this resolution requires a very powerful GPU to maintain smooth frame rates. The monitor features an ultra-high refresh rate of 165 Hz, ideal for competitive gaming, fast-paced shooters, and high-FPS esports titles, complemented by an exceptional 0.03 ms response time for minimal input lag and virtually no motion blur.

The monitor provides very good ergonomic support, enabling users to adjust it for improved comfort during extended gaming, viewing, or daily activities, and provides very good connectivity, meeting the needs of most users in typical home or multi-purpose environments.

Specific ergonomic adjustments and connectivity details can be found in the specifications section below.

Performance per Price

The gaming performance-per-price score of 12.3% indicates that this monitor does not offer strong value for gaming-focused users. Its respectable gaming suitability rating of 89.4% may still justify the price for certain use cases, though better-valued options exist.

With a performance-per-price score of just 18.3%, this monitor does not offer strong value in its category. However, its high-end overall quality of 93.3 pts may still justify the purchase for users prioritizing build excellence, display fidelity, or brand preference over cost.