LG 27U421A

LG 27U421A Review & Specifications

27U421A by LG is a 27.00″ VA monitor with a resolution of 1920 × 1080 pixels (1.778:1, 16:9 aspect ratio) and a refresh rate of up to 100 Hz. It supports a 8-bit color depth, displays up to 16777216 colors, and offers the following color space coverage: 99.00% sRGB . The panel delivers 250 nits of brightness, has a static contrast ratio of 3000:1. The panel is manufactured by AU Optronics (model: M270HVR01.C CELL). It has a pixel density of 81 PPI, with viewing angles of 178 ° (degrees)° horizontal and 178 ° (degrees)° vertical. The screen covers 91.21% of the front surface. It uses a W-LED backlight and has a Anti-glare/Matte (3H) screen coating. HDR capabilities include support for HDR10.

General Work Usage

The LG 27U421A scores a basic 43.4% in productivity, suggesting it may not be well-suited for demanding office work or long-duration professional use. It utilizes a VA panel. These panels offer strong contrast ratios and deep blacks, which can improve image depth and comfort in dim lighting. However, they may suffer from narrower viewing angles and slightly slower pixel response times compared to IPS, potentially leading to subtle color shifts or ghosting during fast movement or multi-monitor setups. The monitor’s resolution of 1920×1080 offers a more modest workspace, potentially limiting multitasking or spreadsheet-heavy workflows. A lower pixel density of 81 ppi can lead to visible pixelation, reducing visual comfort for reading and detailed work, especially on larger screens. With a brightness level of 250 nits, this monitor may appear dim in bright office settings, making it less suitable for environments with strong ambient light.

The LG 27U421A has color space coverage of: 99.00% sRGB , which gives this monitor moderate color gamut coverage, acceptable for general media consumption, light image editing, or office tasks involving visuals. However, it may not display colors as accurately or vibrantly as wide-gamut monitors. The combination of standard 8-bit panel and average gamut coverage means this display is best used for basic content rather than any precision visual work.

The work performance-per-price score of 39.7% indicates that this monitor does not offer strong value for professional productivity use. Given both the modest work suitability score and weak value proposition, there are likely better alternatives in the same price class.

Gaming and Media Usage

The LG 27U421A provides a modest 58.3% entertainment score, making it a viable option for casual gaming, streaming, and everyday media consumption. It features a VA panel, which provide excellent native contrast ratios, resulting in deeper blacks and more immersive visuals in dark scenes — ideal for cinematic gaming and media playback. On the downside, they can suffer from slow pixel response times, leading to noticeable motion blur or ghosting during fast gameplay, particularly in competitive or high-FPS scenarios. With a resolution of 1920×1080, this monitor offers standard image quality. While less visually sharp than higher-res options, it allows for higher frame rates and reduced GPU load — often preferred in competitive or budget-conscious gaming setups. The monitor’s 100 Hz refresh rate offers a smoother experience than 60 Hz, benefiting casual gaming and media consumption, while the None ms response time may produce visible ghosting in fast content.

This monitor includes basic ergonomic features, sufficient for general use but potentially limiting in scenarios that involve prolonged screen time without additional adjustments, and includes basic connectivity options, suitable for casual or single-device setups.

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

Performance per Price

The gaming performance-per-price score of 37.3% indicates that this monitor does not offer strong value for gaming-focused users. With both a low value rating and a modest gaming usage score (58.3%), this monitor may not be ideal for gamers seeking performance and value.

With a performance-per-price score of just 41.0%, this monitor does not offer strong value in its category. With both a low value rating and a modest quality score (44.9 pts), this monitor is less competitive than other options in its price bracket.