Tested by IMartz
LG 39GX950B-B
39-inch 5K2K 165 Hz ultrawide Tandem WOLED. Combines a large workspace and deep blacks, with a lower-resolution 330 Hz mode and 90 W USB-C.
PanelTandem WOLED
A matte surface that diffuses reflections. Light can spread over a larger area; the finish does not eliminate reflections completely.
Choose between two resolution and refresh-rate modes: one prioritises detail and the other a higher refresh rate. See the specifications for the available combinations.
A format wider than the usual 16:9. It provides extra horizontal space; support in games and video depends on their compatibility with this format.
IMartz verdict
Pros
- Plenty of space and detail for gaming and work.
- Well-adjusted colors and deep blacks.
- Fast response and a USB-C connection that also charges your laptop.
Things to consider
- HDR brightness falls in scenes that illuminate much of the screen.
- High and DTM brighten the image at the expense of fidelity.
- Like other WOLEDs, it may show banding in some dark tones.
A good fit if…
- You want a large screen for immersive games and multiple windows.
- You want to combine high resolution and fast response on PC.
Consider another option if…
- You prefer a flat screen or do not have room for its 39 inches.
- You need to maintain high brightness in bright full-screen scenes.
Measurements and specifications
IMartz test results. See each section for the measurement conditions.
Display and format
SDR performance
Color, brillo, contraste y comportamiento básico fuera de HDR.
HDR performance
Brillo pico, volumen de color, EOTF y experiencia HDR real.
Test note · EOTF tracking
References measured with Gamer 1 and the Manual setting, at both Peak Brightness Low and High. Low tracks the reference quite well at 10 %, although it slightly darkens some midtones. High brightens shadows and midtones, especially at 2 %; it offers higher peak brightness but lower fidelity. DTM increases that brightening, so I would leave it off if you want to preserve the original image. Full-screen brightness is around 300 nits, with compressed highlights.
OLED brightness
Datos específicos de brillo en OLED, APL y desbloqueos relevantes.
Response time and PC gaming
Overdrive, tiempo de respuesta, overshoot, VRR e input lag.
OLED characteristics
Subpíxel, claridad de texto, protecciones y limitaciones del panel.
Connectivity
Entradas de vídeo, USB-C, KVM, hub USB y extras de conexión.
Stand, mounting and extras
Calidad física, ergonomía, VESA y detalles destacables.
Photos and test results
Open an image to view the full-size charts and browse the tests.
Grayscale and gamma
Colour gamut and accuracy
Brightness and uniformity
Calibration
Luminance and EOTF
HDR colour
Response time, motion and latency
Alternatives
Other options, each with its own specifications and test results.
