Tested by IMartz
LG 27GX790A-B
27-inch 1440p 480 Hz WOLED aimed at high-end competitive gaming. It stands out for speed, good color, hardware calibration, full-bandwidth HDMI 2.1 and very competitive pricing against other high-refresh-rate OLEDs.
PanelWOLED
A matte surface that diffuses reflections. Light can spread over a larger area; the finish does not eliminate reflections completely.
IMartz verdict
Pros
- Genuine 480 Hz with instant OLED response, ideal for competitive gaming and maximum motion clarity.
- Good color gamut coverage and deep blacks with the WOLED MLA panel.
- Built-in hardware calibration, unusual in a gaming OLED at this price.
Things to consider
- Quite pronounced matte finish, with some grain and a less clean image than glossy.
- VRR flickering and an occasional signal-loss bug when using DisplayPort 2.1 with G-Sync.
- Typical WOLED limitations: grid effect, grayscale banding and some black crush.
A good fit if…
- Those seeking a very high-refresh-rate 1440p OLED at the lowest possible price.
- Competitive gamers who can use 480 Hz and prioritize low latency and motion clarity.
- Users who want a fast OLED with good color and hardware calibration without moving to more expensive models.
Consider another option if…
- You want a glossy finish or the cleanest possible desktop image.
- You are very sensitive to VRR flicker or do not want to deal with occasional DisplayPort/G-Sync bugs.
- You want the best OLED for overall image quality rather than the cheapest fast OLED.
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.
Test note · DCI-P3 accuracy
inaccurate yellows
HDR performance
Brillo pico, volumen de color, EOTF y experiencia HDR real.
Test note · ΔE ITP HDR
although red lacks saturation
Test note · EOTF tracking
Peak Brightness Low tracks the reference quite well, with a slight lift in shadows and midtones. High brightens the image much more and compresses highlights, especially with small lit areas. Maximum brightness decreases as the lit area grows.
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.
PS5 and consoles
Compatibilidad con VRR, ALLM y resoluciones permitidas.
4K 120 Hz
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
Calibration
Brightness and uniformity
Luminance and EOTF
HDR colour
Response time, motion and latency
Alternatives
Other options, each with its own specifications and test results.
