LG 27GX700A-B 27-inch

By LG · Gaming Monitors · Audio & Electronics

  • 27 in QHD 2560 x 1440 OLED
  • 280 Hz refresh rate
  • 0.03 ms response time
  • 99.5% DCI-P3 coverage
  • 335 cd/m2 typical brightness

Lowest price seen
~$599.99 (approx.)
from $599.99 at Amazon

Prices are snapshots. Check the current price with the store.

Summary

A 27-inch 1440p 280Hz OLED gaming monitor with LG’s fourth-generation Primary RGB Tandem WOLED panel, matte anti-glare finish and HDMI 2.1. Check near-black banding before you buy: multiple independent labs and owners report vertical gray bands in dark content, and pixel cleaning does not reliably fix them.

Strengths

  • RTINGS measured near-instant pixel response and low input lag across refresh rates at 280 Hz.
  • DDay measured about 312 nits fullscreen and over 1,300 nits on small bright HDR elements.
  • Matte finish suppresses harsh reflections; RTINGS judges reflection handling good for an OLED.
  • Both HDMI 2.1 and DisplayPort 1.4 support QHD 280 Hz; consoles can send 4K/120 for downscaling.
  • Height, swivel, tilt and portrait pivot reduce the need for a third-party arm.
  • LG offers LG Switch and Calibration Studio software, and RTINGS retested a firmware update in February 2026.

Weaknesses

  • RTINGS and TFTCentral observed near-black vertical banding; owners report bands that persist after pixel cleaning.
  • RTINGS reports distracting VRR flicker in dark content when frame rate varies.
  • Out-of-box HDR modes often overbrighten content above reference accuracy.
  • Matte coating can show grain and text fringing; small RGB text is less crisp than on 27-inch 4K IPS.
  • No USB-C dock, charging, KVM or speakers; the USB-A hub needs its own USB-B upstream connection.
  • OLED burn-in risk with static taskbars, HUDs and dashboards; no model-specific long-term burn-in data exists.

Verified specifications

Panel26.5-inch viewable, 2560 × 1440, 280 Hz, fourth-generation Primary RGB Tandem WOLED with matte anti-glare finish.
Response0.03 ms GtG (manufacturer); RTINGS measured near-instant pixel response and low input lag.
HDRVESA DisplayHDR True Black 500; peak brightness up to 1,500 nits in restricted HDR conditions.
Color~98.5% DCI-P3 (manufacturer); DDay measured ~99.9% DCI-P3.
Inputstwo HDMI 2.1, one DisplayPort 1.4; no DisplayPort 2.1, no USB-C DisplayPort Alt Mode or power delivery.
VRRG-SYNC Compatible, AMD FreeSync Premium Pro, HDR10.
USB/audioone USB 3.0 upstream Type-B, two USB-A downstream, four-pole headphone output with DTS Headphone:X; no built-in speakers.
Standheight, pivot, swivel, tilt; 110 mm height adjustment, tilt -5° to +15°, swivel ±30°, pivot 90°; 100 × 100 mm VESA.
Dimensions605.2 × 579.3 × 249.1 mm at maximum stand height; 605.2 × 469.3 × 249.1 mm at minimum; panel alone 605.2 × 351.0 × 45.3 mm.
Weight9.0 kg with stand, 4.8 kg without stand.
Powerexternal AC adapter; below 0.5 W sleep, below 0.3 W DC off.
Warrantytwo years parts and two years labor (US).
In the boxmonitor, stand, DisplayPort cable, HDMI cable, USB-A-to-B cable.
Full research notes and sources

Banding and dark-scene uniformity

The best-supported weakness is near-black gray vertical banding. RTINGS observed it in the purchased exact model, and TFTCentral’s investigation of fourth-gen Tandem WOLED reproduced the RTINGS LG example. A November 2025 owner posted severe bands; an August 2026 owner described noticeable bands in games and dark apps despite attempted pixel cleaning. Other owners describe only slight bands. TFTCentral obtained a panel-maker statement saying the variance is within normal manufacturing tolerances, but no auditable failure rate was supplied. Small early refresh cycles can diminish bands, but an August 2026 owner said bands persisted despite a number of cleanings. Judge with real content inside the return window rather than obsessively checking uniform test patterns.

HDR and brightness

LG advertises up to 1,500 nits peak brightness in restricted HDR conditions. DDay measured approximately 560 cd/m² through a 10% window and 312 cd/m² fullscreen in the certified DisplayHDR 500 profile. With Peak Brightness changed from Low to High, DDay recorded over 1,300 cd/m² only on tiny details and over 700 cd/m² at 10%, while observing less accurate PQ/EOTF tracking. RTINGS says many HDR modes deliberately overbrighten content above reference. The highest peak HDR mode overbrightens some content, and long white text or web pages may trigger OLED automatic brightness limiting.

Running costs and parts

There are no required annual consumables — no filters, cartridges, backlight bulbs or batteries. An illustrative energy example (not measured): assume 35 W while displaying content for 8 hours/day, 0.5 W asleep the remaining 16 hours, every day for 365 days, at an assumed $0.20/kWh US residential tariff. The math is 105.12 kWh/year, or $21.02/year. The 35-W figure is deliberately an assumption, not sourced to an LG-specific wattmeter.

Replacement cables are one-time costs if originals are lost: Monoprice Select Series DisplayPort 1.4 (6 ft) is $8.29, Monoprice USB 3.0 Type-A-to-Type-B (6 ft) is $6.79, and Monoprice Certified Ultra High Speed HDMI 2.1 (6 ft) is $14.69, all direct from Monoprice US. No verified US OEM adapter price exists; LG’s Korean domestic page lists accessory EAY63032209 with KRW pricing, but that is not sufficient to recommend for a US unit without LG confirmation.

Is it worth it?

At or below $400 authorized new it is excellent if OLED banding risk and returns are acceptable. $400–$450 is very competitive for 280-Hz RGB Tandem OLED. $450–$500 merits considering the alternate coating and calibration. Above $500, compare the ASUS XG27AQWMG at $649 official with a true glossy surface and similar panel, or wait for recurring LG sales. At about $380–$400, the older LG 27GX704A-B 240-Hz glossy is a real alternative if glare control is less important. LG US lists the 27GX700A-B at $449.99 (October 2026), B&H Photo lists it at $499.99, and a July 2026 buyer confirmed paying $399.99 direct from LG. A Newegg third-party listing asks $699.99.

Which model this is

This page covers the LG UltraGear 27GX700A-B, US regional support identifier 27GX700A-B.AUS. Do not confuse it with the 27GX704A-B glossy 240-Hz third-generation WOLED, the 27GX790A-B 480-Hz third-generation WOLED, or ASUS and Gigabyte implementations of a related panel.

Sources

Manufacturer:

Independent reviews:

Owner reports:

Parts and stores:

Buying guides for this category

Related products