LG UltraGear 27GX704A-B 27-inch QHD OLED Gaming Monitor Review

Best For

• Competitive PC gamers who want OLED contrast and 240Hz motion
• PS5 or Xbox users who value HDMI 2.1 and VRR support
• Gaming and media use in controlled lighting

Who Should Skip It

• Text-heavy office work with static UI for long periods
• Bright rooms where glossy reflections are a major concern
• Buyers who need built-in speakers or USB-C video as core requirements

Key Specifications

Model

27GX704A-B

Display

27-inch-class OLED, 2560 × 1440 QHD, glare/glossy surface

Refresh rate

240Hz

Response time

0.03ms GtG — LG manufacturer specification

Color

DCI-P3 98.5% typical — LG specification

HDR

VESA DisplayHDR True Black 400

Adaptive sync

NVIDIA G-SYNC Compatible / AMD FreeSync Premium Pro / VESA AdaptiveSync

Connectivity

HDMI 2.1 and DisplayPort 1.4

Built-in speakers

None

Panel type

Third-generation WOLED (RTINGS)

USB

Small USB hub with two USB-A ports

Strengths

• QHD OLED panel combines per-pixel black levels with 240Hz refresh
• HDMI 2.1 plus G-SYNC Compatible and FreeSync Premium Pro cover modern PC/console VRR use
• Glossy OLED presentation can look especially clear in controlled lighting
• Full ergonomic positioning supports desk gaming setups

Limitations and Trade-offs

• Glossy reflections can be distracting in bright rooms
• No built-in speakers
• OLED static-content care matters more for repetitive desktop use than it does on LCD
• 1440p text rendering is less productivity-focused than a 4K IPS alternative
• Independent testing found noticeable VRR flicker when frame rates swing

Competitive PC gaming

The verified 240Hz refresh ceiling and OLED pixel response are the reasons to consider this monitor for fast games. LG’s 0.03ms GtG figure is a manufacturer specification, not a Pickora measurement, so the review does not present it as an independently measured result.

Console gaming

The monitor supports up to QHD 240Hz from a compatible PC, but PS5 and Xbox Series X|S are limited to 120Hz output in supported games and display modes. According to RTINGS, the 27GX704A-B can accept a 4K/120Hz console signal and scale it to its native 1440p resolution. Before buying it for console gaming, confirm your game's 120Hz support, console video settings, and HDMI connection.

HDR and media

OLED’s per-pixel light control can place bright highlights beside true black without a conventional backlight. LG lists DisplayHDR True Black 400 and a much higher small-window peak-brightness claim. Peak figures depend on window size and picture mode and should not be read as full-screen brightness.

Office and creative work

Wide color coverage and OLED contrast can be useful for mixed creative work, but professional workflows still require the correct color space and calibration process. For predominantly text-heavy office use, glossy reflections, OLED subpixel behavior and static-content exposure make an IPS alternative easier to own.

27GX704A-B, 27GS95QE-B or 27GX700A-B?

LG sells several 27-inch 1440p OLED UltraGear models with similar names. RTINGS describes the 27GX704A-B as newer than the 27GS95QE-B, with a glossy coating as the main difference; glossy screens look clearer and keep blacks deeper in a dim room but show mirror-like reflections. The 27GX700A-B moves up to a Tandem OLED panel at 280Hz and, in RTINGS’ comparison, is brighter with more vivid color and a matte coating, while the 27GX704A-B has the slightly more adjustable stand. Choose the 27GX704A-B if you prefer a glossy image, can control direct reflections, and find it at a meaningfully lower price than the 27GX700A-B. Consider the 27GX700A-B if brighter HDR highlights, more vivid colors, and a matte finish matter more than the price difference. The better purchase depends on your room, gaming priorities, and current US pricing.

What independent testing found

RTINGS rates the 27GX704A-B as a strong PC gaming monitor: near-instant response, low input lag at every refresh rate, support for the common VRR formats and deep blacks without blooming. Its criticisms line up with the trade-offs above: colors are less vivid than on newer OLED panels, reflections are distracting in sunny rooms, and VRR flicker is noticeable in games whose frame rate swings. Capping frame rates or using a steadier frame-rate target usually reduces visible flicker on OLED monitors. Some retailers list the viewable diagonal as 26.5 inches; LG markets it as a 27-inch-class screen.

Buying Decision

Choose the 27GX704A-B when fast 1440p gaming, OLED contrast and HDMI 2.1 matter more than 4K desktop sharpness or office-first features. A buyer who mainly works with static documents, code or browser windows for long sessions should compare a high-resolution IPS monitor without OLED retention concerns. For US purchases, confirm that the offer matches model 27GX704A-B.AUS and check the seller's condition, return terms, and warranty eligibility. LG's US support page lists two years of coverage for parts and labor, but buyers should review the detailed warranty terms for OLED-specific exclusions, including how image retention or burn-in is treated.

Value and Trade-offs

OLED black levels and 240Hz refresh are the main reasons to consider this LG for gaming. Compare current offers against the Dell S2725QS if sharper 4K text is more important. Neither wide color coverage nor the manufacturer response-time figure establishes measured color accuracy or input lag. Reflections and prolonged static desktop use remain practical OLED tradeoffs.

Final Verdict

The LG 27GX704A-B is strongest as a fast 1440p OLED gaming monitor, not as a general-purpose office display. Its 240Hz OLED panel, HDMI 2.1 and VRR support earn Pickora’s 4.6/5 editorial rating, balanced against reflections, no speakers, 1440p text tradeoffs and OLED static-content considerations.

How Pickora Scored It

1. Gaming responsiveness — 4.9/5 (30%)

   240Hz OLED and modern VRR connectivity are the central strengths; published response time is treated as a manufacturer claim.

2. Image quality — 4.8/5 (25%)

   OLED black levels, wide color coverage and HDR certification support a strong media/gaming case.

3. Connectivity and ergonomics — 4.6/5 (20%)

   HDMI 2.1, DisplayPort and a flexible stand cover common gaming setups, though USB-C video and speakers are absent.

4. Productivity fit — 3.8/5 (15%)

   Glossy reflections, 1440p text rendering and static-content considerations reduce office-first suitability.

5. Overall value — 4.4/5 (10%)

   Strong value when the buyer specifically wants 27-inch QHD OLED at 240Hz.

Final Pickora Rating: 4.6/5.

Sources and Research

• LG UltraGear 27GX704A-B official product page (LG Canada) — LG. 27-inch-class QHD OLED, glare panel, 240Hz, 0.03ms GtG manufacturer rating, HDMI 2.1, DCI-P3 98.5%, DisplayHDR True Black 400, G-SYNC Compatible and FreeSync Premium Pro.
• LG 27GX704A-B.AUS US support and warranty — LG USA. Official US model identifier and two-year limited parts-and-labor warranty summary; buyers should check the full terms for OLED image retention and burn-in.
• LG 27GX704A-B Monitor Review — RTINGS.com. Independent test findings on response time, input lag, VRR support and flicker, black levels, reflections, color and the two-port USB hub; also identifies the panel as third-generation WOLED and the 27GS95QE-B difference.
• LG 27GX700A-B vs 27GX704A-B — RTINGS.com. Differences between the two LG models: Tandem OLED at 280Hz, brightness, color, matte versus glossy coating and stand adjustment.

Frequently Asked Questions