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27 inch black OLED gaming monitor with glossy virtually borderless screen and adjustable stand

LG Electronics

LG Electronics 27GX704A-B 27" QHD 240Hz OLED gaming monitor

SKU CH-3ANG-X51SK MPN 27GX704A-B

A 27-inch QHD OLED gaming monitor delivering 240Hz refresh rate, 0.03ms response time and 1300nits peak brightness with G-Sync and FreeSync Premium Pro support

  • Screen size27 in (68.6 cm)
  • Display resolution2560 × 1440 (2K)
  • Refresh frequency240 Hz
  • Panel typeOLED
  • Pixel response time0.03 ms
  • Bezel style4-side virtually borderless

Refresh rate 240Hz

  • 240Hz refresh rate and 0.03ms response time deliver ultra-smooth, tear-free gameplay
  • Peak brightness of 1300 nits makes highlights vivid while 275 nits standard keeps scenes clear
  • VESA DisplayHDR True Black 400 with 1,500,000:1 contrast reveals detail in deep blacks and bright sparks
  • 5% DCI-P3 coverage across 1.07 billion colours renders vibrant, lifelike game worlds
  • UL-certified Anti-Glare, Flicker-Free and Low Blue Light reduce eye strain during long sessions

27" QHD OLED 240Hz Gaming Monitor

The LG UltraGear 27GX704A-B is a 27 inch QHD OLED display built for competitive gaming. Its 2560 x 1440 panel runs at 240 Hz with a 0.03 ms response time and supports both FreeSync Premium Pro and G-Sync Compatible variable refresh. The glossy finish and 98.5% DCI-P3 coverage target players who want high motion clarity and vivid colour.

OLED Panel Brightness and Eye-Comfort Certifications

The self-emissive OLED delivers a typical brightness of 275 nits and can peak at 1300 nits for HDR highlights, backed by VESA DisplayHDR True Black 400 and a 1,500,000:1 contrast ratio. Three UL certifications confirm anti-glare, flicker-free operation and low blue-light output, helping to reduce eye strain during long sessions without active cooling noise.

Upgrade From Standard IPS or 144Hz Panels

Moving from a typical IPS monitor at 144 Hz or lower gives an immediate jump in motion handling, black depth and HDR impact thanks to the 240 Hz refresh, near-instant pixel response and true blacks. The improvement is most noticeable in fast-paced shooters and dark-scene games where contrast and speed matter most.

How it compares

Measured against everything we stock in Monitors for Gamers, at today’s prices. Recalculated every night.

Price $389.99
Pricier than about 78% of the 839 comparable items (median $189.99).
Screen size 27 in (68.6 cm)
Typical for this category: the median of 814 items is 27 in.
Refresh frequency 240 Hz
Higher than about 70% of the 735 comparable items (median 180 Hz).

Specifications

Product
Brand nameLG
Product lineUltraGear
Model name27GX704A-B
Part number27GX704A-B
Case colorBlack
Display
Screen size27 in (68.6 cm)
Display resolution2560 × 1440 (2K)
Refresh frequency240 Hz
Panel typeOLED
Pixel response time0.03 ms
Image brightness275nits (standard) / 1300nits (peak)
Screen curvatureFlat Panel
Bezel style4-side virtually borderless
Widescreen formatYes
Display formatQHD
Variable refresh rateFreeSync Premium Pro & G-Sync Compatible
Screen ratio16:9
Contrast1,500,000:1
Color gamut coverageDCI-P3 Typical 98.5%
Colors displayed1.07 Billion
Pixel pitch0.2292 × 0.2292
DisplayHDR certificationDisplayHDR True Black 400
Audio & video
Integrated speakersNo
Integrated webcamNo
Ports & slots
HDMI ports2 x HDMI 2.1
DisplayPort connectors1 x DisplayPort 1.4
Video connectors1 x DisplayPort 1.4 / 1 x USB-C (DP Alternative) / 2 x HDMI 2.1
USB connections1 x USB 3.2 Upstream / 2 x USB 3.2 Downstream
Headphone jack3.5 mm headphone jack
Size & build
Stand adjustabilityHeight, Pivot, Swivel, Tilt
VESA mounting pattern100 × 100 mm
Shipping weight6.80 kg
Package size673 × 529 × 168 mm

Other versions of this model

3 more in the same range

Questions about this item

Will my graphics card handle the 240Hz refresh rate at 2560 x 1440?

Any GPU with DisplayPort 1.4 or HDMI 2.1 can drive 240Hz at QHD; check your card’s port version to be sure.

Does the stand allow the screen to sit low enough for my desk setup?

The stand offers height adjustment, tilt, swivel and pivot so you can set the exact viewing height and angle you need.

What does the 1300nits peak brightness mean for HDR gaming?

It enables VESA DisplayHDR True Black 400 performance — deep blacks and bright highlights hit 1300nits in small specular areas for strong contrast.

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