Key takeaways
- Fast 240Hz refresh with near-instant 0.03ms response
- Excellent OLED contrast and clean, blur-free motion
- G-Sync and FreeSync Premium Pro support
- Attainable price for a 1440p OLED gaming panel
What's inside
The LG 27GX704A-B is a 27-inch UltraGear QHD (2560×1440) OLED gaming monitor running at 240Hz with a 0.03ms response time, NVIDIA G-Sync compatibility, AMD FreeSync Premium Pro and VESA DisplayHDR True Black 400. It is LG’s take on the classic competitive sweet spot: a 27-inch 1440p high-refresh OLED that balances speed, sharpness and price.
It is built for gamers who want fast, fluid competitive play with OLED image quality, without stretching to a 4K or ultrawide flagship. If you play a lot of shooters or fast action games at 1440p and want deep blacks and quick motion at a relatively attainable price, this is the target buyer. Those wanting 4K detail or a huge canvas should look higher up LG’s range.
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Watch: LG UltraGear OLED Review — Video Review
Design & Build
The 27GX704A-B carries LG’s familiar UltraGear styling: slim bezels, a low-profile rear and a sturdy stand with tilt and height adjustment. The OLED panel is thin, and LG keeps the aesthetic gamer-appropriate without going overboard on RGB. Connectivity covers HDMI 2.1 and DisplayPort, and the build feels solid for the class. As with any OLED, LG bakes in pixel-shifting and other burn-in mitigation, and the panel treatment strikes a reasonable balance for varied lighting conditions in a typical gaming room.
Performance
At 1440p and 240Hz the 27GX704A-B is fast and responsive, with the 0.03ms OLED response delivering exceptionally clean motion and no perceptible smearing in fast pans. Competitive titles feel immediate, and the combination of high refresh and instant pixel response is a genuine advantage over LCD alternatives. G-Sync and FreeSync support keep gameplay tear-free across a wide frame-rate window.
Image quality benefits from OLED’s per-pixel contrast, so blacks are truly black and HDR content has real punch within the True Black 400 envelope. The 27-inch QHD density is sharp for gaming, though not as pixel-dense as a 4K panel. As ever with OLED, full-screen brightness is modest compared with mini-LED, so it is happiest away from strong direct light, and the usual static-content precautions apply for mixed desktop use.
Pros & Cons
- Fast 240Hz refresh with near-instant 0.03ms response
- Excellent OLED contrast and clean, blur-free motion
- G-Sync and FreeSync Premium Pro support
- Attainable price for a 1440p OLED gaming panel
- Modest full-screen brightness versus mini-LED
- QHD is less sharp than a 4K panel for detail work
- Standard OLED burn-in caution for static content
Alternatives to Consider
Gamers who want maximum refresh should consider the LG 27GX790A-B, which pushes the same 1440p OLED panel to 480Hz for esports. Those wanting 4K detail with a dual-mode trick can look at the LG 32GX850A-B, a 32-inch 4K OLED that switches between 165Hz and a high-refresh mode, while enthusiasts craving an immersive canvas should weigh the LG 45GX950A-B 5K2K ultrawide.
Frequently Asked Questions
Is 240Hz enough for competitive gaming?
For the vast majority of players, yes. 240Hz paired with OLED’s 0.03ms response gives extremely smooth, low-blur motion; only dedicated esports pros chasing every millisecond need to consider the 480Hz models.
Is QHD OLED sharp enough at 27 inches?
Yes, 1440p on a 27-inch panel is a well-balanced density for gaming, offering crisp images without the GPU demands of driving 4K at high refresh.
How does it handle HDR?
It supports VESA DisplayHDR True Black 400, so HDR content shows deep blacks and good contrast, though peak brightness is lower than high-end mini-LED displays.
Does it work with both NVIDIA and AMD cards?
Yes, it is NVIDIA G-Sync compatible and supports AMD FreeSync Premium Pro, providing tear-free variable refresh with either brand.
Verdict
The LG 27GX704A-B hits a very appealing balance for 2026: OLED contrast and motion clarity at the popular 27-inch 1440p 240Hz spec, at a price that is easier to justify than the 4K and ultrawide flagships. You give up some brightness and outright pixel density, but for fast-paced gaming with gorgeous blacks and buttery motion, it is one of the smartest OLED buys in its class.
