39 inch OLED monitor LG 39GX90SA-W — 3440 x 1440, 21:9, curved, built-in speakers, VESA, USB-C

The LG 39GX90SA-W is a 39" OLED monitor with a 3440 x 1440 Wide Quad HD resolution and a 21:9 aspect ratio. The curved OLED panel delivers deep contrast and wide 178° viewing angles, while built-in speakers and VESA mount compatibility support both multimedia and ergonomic installations. The monitor has a slim white design and supports height adjustment for comfortable desktop use.

Advantages

OLED panel technology provides high contrast and deep blacks with a typical contrast ratio of 1,500,000:1. The ultrawide 21:9 resolution increases horizontal screen space for multitasking and immersive content. A fast response time (0.03 ms) and a maximum refresh rate of 240 Hz reduce motion blur for fast-moving images. The curved screen and wide viewing angles preserve image quality across the display, and integrated speakers plus multiple video inputs (HDMI and DisplayPort) simplify connectivity.

Suitable for

• Multitasking and productivity with wide 21:9 workspace
• Content creation and color-critical previewing on OLED
• Gaming that benefits from high refresh rate and low response time
• Media playback and office use with built-in speakers

Key specifications

• Display size: 39 inches
• Resolution: 3440 x 1440 (Wide Quad HD)
• Panel type: OLED, curved screen
• Aspect ratio: 21:9
• Typical contrast ratio: 1,500,000:1
• Typical brightness: 275 cd/m²
• Pixel pitch: 0.266 x 0.266 mm
• Response time: 0.03 ms
• Maximum refresh rate: 240 Hz
• Connectivity: 2× HDMI, 1× DisplayPort, 1× USB Type-C downstream
• Headphone output: Yes
• Built-in speakers: Yes
• VESA mounting: Yes
• Color: White

How to use

Place the monitor on a stable desk or attach it to a VESA-compatible mount. Connect video sources using HDMI, DisplayPort or the USB-C downstream port depending on your device. Adjust the display height for an ergonomic viewing position and use the on-screen menu to configure brightness, refresh rate, and color settings. For gaming, select the higher refresh rate and ensure connected hardware supports the desired output. Use the headphone output or built-in speakers for audio playback.

Recommendations

To maintain image quality and maximize panel lifetime on an OLED display, avoid static high-contrast images for extended periods and use screen savers or power-saving modes when the monitor is idle. For best results in color-critical work, allow the panel to warm up and calibrate using appropriate tools.