LG 27G550B-B 27″ 300Hz Monitor

27 inch · 1920 x 1080 · 300 Hz · IPS

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Screen size 27 inch
Resolution 1920 x 1080
Refresh rate 300 Hz
Panel IPS
Response time 1 ms

LG 27G550B-B 27″ 300Hz Monitor is a 27-inch monitor with 1920 x 1080 resolution, a 300 Hz refresh rate and IPS panel. The high refresh rate makes fast games look smoother. It came out in 2026.

Released: 2026-07-03

Specifications

Key specs

Screen size: 27 inch
Resolution: 1920 x 1080
Refresh rate: 300 Hz
Panel: IPS
Response time: 1 ms
Released: 2026-07-03
Part number: 27G550B-B

Display

Display diagonal: 68.6 cm (27")
Display resolution: 1920 x 1080 pixels
HD type: Full HD
Native aspect ratio: 16:9
Display technology: LCD
Panel type: IPS
Display brightness (typical): 300 cd/m²
Response time: 1 ms
Response time measurement type: GTG (Gray to Gray)
Screen shape: Flat
Contrast ratio (typical): 1000:1
Maximum refresh rate: 300 Hz
Viewing angle, horizontal: 178°
Viewing angle, vertical: 178°
Display number of colours: 16.7 million colours
Pixel pitch: 0.3108 x 0.3108 mm
Display diagonal (metric): 68.4 cm
High Dynamic Range (HDR) supported: Yes
High Dynamic Range (HDR) technology: High Dynamic Range 10 (HDR10), HDR Effect
Colour gamut standard: sRGB
Colour gamut: 99%
sRGB coverage (typical): 99%

Performance

NVIDIA G-SYNC: Yes
AMD FreeSync: Yes
AMD FreeSync type: FreeSync Premium
Flicker-free technology: Yes
Smart modes: Energy saving

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Design

Market positioning: Gaming
Product colour: Black

Ports & interfaces

HDMI: Yes
HDMI ports quantity: 2
DisplayPorts quantity: 1
DisplayPort version: 1.4
Headphone out: Yes

Ergonomics

VESA mounting: Yes
Panel mounting interface: 100 x 100 mm
Height adjustment: Yes
Pivot: Yes
Swivelling: Yes
Tilt adjustment: Yes

Power

Power consumption (standby): 0.5 W
Power consumption (off): 0.3 W
AC input voltage: 100 - 240 V
AC input frequency: 50/60 Hz
Power supply type: External

Weight & dimensions

Width (with stand): 614.1 mm
Depth (with stand): 220 mm
Height (with stand): 534.4 mm
Weight (with stand): 5.5 g
Width (without stand): 614.1 mm
Depth (without stand): 49.1 mm
Height (without stand): 358.8 mm
Weight (without stand): 3.2 g

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About this product

Fluid gaming motion with 300Hz refresh rate To bring a 300Hz refresh rate for fluid, crystal-clear visuals, while minimizing motion blur. Dive into more immersive gameplay with every frame. 1ms (GtG). Quick response for gameplay. The 1ms (GtG) response time is built to reduce reverse ghosting, helping maintain clearer on-screen transitions for smoother, more responsive gameplay. Smooth motion that keeps you immersed Minimize tears and lags with NVIDIA® G-SYNC® compatible and AMD FreeSync™ Premium technology. Experience significantly reduced screen tearing and stuttering for smooth visuals with minimized motion blur and ghosting. Feel actual combat with vivid color Our monitor offers 99% sRGB coverage, providing a wide color spectrum that enables high-fidelity color representation with its IPS display for an immersive gaming experience. It allows gamers to experience dramatic battlefields as intended by the game developers. Smarter control, seamless switching by LG Switch With the LG Switch app, it's easy to optimize your monitor for both gaming and everyday use.

27G550B-B vs similar monitors

	LG 27G550B-B 27″ 300Hz Monitor	Samsung G40H 27″ 300Hz Monitor	LG 25G550B-B 25″ 300Hz Monitor	LG 27GN750-B 27″ 240Hz Monitor
Screen size	27 inch	27 inch	25 inch	27 inch
Resolution	1920 x 1080	1920 x 1080	1920 x 1080	1920 x 1080
Refresh rate	300 Hz	300 Hz	300 Hz	240 Hz
Panel	IPS	IPS	IPS	IPS
Response time	1 ms	1 ms	1 ms	1 ms
Released	2026	2026	2026	2026