The LG 27GX790A-B Ultragear OLED is a masterpiece of display innovation — combining 480 Hz refresh rate, 0.03 ms response, and QHD 1440p OLED clarity for the most responsive and visually striking gaming experience ever released.
Targeted squarely at competitive and professional gamers, this monitor brings unprecedented motion precision, perfect blacks, and instant pixel response, setting a new standard for OLED esports monitors. If you demand zero compromise between speed and image fidelity, the 27GX790A-B is the definition of next-generation performance.
- 27” OLED Brilliance with up to 480Hz of Game-Changing Speed – Experience ultra-smooth, tear-free gameplay with up to 480Hz refresh rate and 0.03ms response time on a bright 27” QHD OLED display. React instantly, spot every detail, and outpace your opponents in every frame with unbeatable speed and clarity.
Design & Build Quality
LG’s Ultragear design language continues to impress with clean lines, subtle aggression, and robust functionality. The 27-inch chassis features an ultra-slim OLED panel framed by razor-thin bezels and a matte anti-glare finish to reduce reflections.
The ergonomic stand supports full tilt, swivel, pivot, and height adjustments, ensuring precise positioning for long competitive sessions. A built-in cable management channel keeps the setup tidy, while the black brushed finish with red Ultragear accents adds a professional gaming aesthetic.
The monitor is also VESA mount compatible (100 × 100 mm) for multi-monitor rigs or arm-mount setups. Despite housing advanced cooling and power components for OLED performance, the overall footprint remains compact and desk-friendly.
Display Performance – 480 Hz Refresh Rate & OLED Precision
At its core, the LG 27GX790A-B is all about speed. With a native 480 Hz refresh rate and 0.03 ms gray-to-gray response time, it offers literally the fastest motion clarity ever seen on a gaming monitor.
Combine that with QHD (2560 × 1440) resolution and self-emissive OLED pixels, and you get jaw-dropping image sharpness, instantaneous pixel transitions, and virtually zero motion blur.
- Panel Type: OLED (10-bit True Black 400)
- Refresh Rate: 480 Hz (native, adaptive-sync supported)
- Response Time: 0.03 ms (GtG)
- Brightness: Peak 400 nits (HDR True Black 400)
- Contrast Ratio: 1,500,000 : 1 (infinite dynamic)
Every frame feels liquid-smooth — ideal for titles like Valorant, CS2, Fortnite, Overwatch 2, and Call of Duty. Even during rapid 180-degree flicks, the display maintains absolute clarity with zero ghosting.
Color Accuracy & HDR Experience
Thanks to OLED’s per-pixel lighting control, the 27GX790A-B produces true blacks, vivid contrast, and precise color rendering that conventional LED monitors simply cannot match.
Covering 99% DCI-P3 and 100% sRGB, it’s equally capable for color-sensitive creative work like video editing and motion graphics.
The VESA DisplayHDR True Black 400 certification enhances HDR gaming and movie playback with deep shadow detail and bright highlight separation. Games such as Cyberpunk 2077, Alan Wake 2, and Horizon Forbidden West come alive with cinematic realism and rich tone depth.
Adaptive Sync – NVIDIA G-Sync & AMD FreeSync Premium Pro
This monitor supports both NVIDIA G-Sync Compatible and AMD FreeSync Premium Pro, ensuring flawless frame synchronization and tear-free gaming across any GPU platform.
Combined with 480 Hz speed, adaptive sync minimizes latency and ensures input-to-display response under 1 ms, giving competitive players a tangible edge.
Connectivity & Ports
LG equips the 27GX790A-B with next-gen I/O, ensuring future-proof compatibility for high-bandwidth gaming systems:
- 1 × DisplayPort 2.1 – full QHD 480 Hz support
- 2 × HDMI 2.1 – 4K 120 Hz / QHD 240 Hz console compatibility
- 1 × USB Type-B (Upstream) + 2 × USB Type-A (Downstream)
- 1 × Headphone Out (4-pole, DAC enhanced)
The inclusion of DisplayPort 2.1 ensures maximum bandwidth for uncompressed high-frame-rate QHD output — a must for RTX 4000 and Radeon 7000-series GPUs.
Gaming Features & Enhancements
Being part of the Ultragear Elite line, the 27GX790A-B includes LG’s signature competitive features:
- Dynamic Action Sync – reduces input lag to imperceptible levels.
- Black Stabilizer – boosts visibility in dark in-game areas.
- Crosshair Overlay – customizable reticles for FPS titles.
- FPS Counter / On-Screen Display Controls – quick access to key stats and presets.
LG’s new Game Optimizer UI allows users to tweak refresh rates, overdrive, HDR modes, and adaptive sync from a single clean interface.
Burn-In Prevention & OLED Care
LG integrates advanced OLED Care 2.0 technology, including:
- Pixel Refresh (automatic after set usage hours)
- Screen Move / Logo Brightness Limiter
- Auto Shutdown Timer
These features protect the panel from image retention or burn-in during long gaming or desktop use, extending the monitor’s lifespan significantly.
Real-World Performance Summary
| Category | Specification | Performance Experience |
|---|---|---|
| Display Size | 27″ QHD (2560×1440) OLED | Sharp, color-accurate, immersive |
| Refresh Rate | 480 Hz | Fastest motion clarity in gaming |
| Response Time | 0.03 ms GtG | Instant pixel transitions |
| Brightness | HDR True Black 400 | Deep contrast, accurate HDR |
| Color Gamut | 99% DCI-P3 / 100% sRGB | Rich, vivid color accuracy |
| Sync Tech | G-Sync & FreeSync Premium Pro | Zero tearing, ultra-low latency |
| Ports | DP 2.1, HDMI 2.1, USB Hub | Next-gen connectivity |
| Ergonomics | Tilt, Swivel, Height, Pivot | Comfortable multi-angle setup |
| Burn-In Prevention | OLED Care 2.0 | Extended panel longevity |
| Design | Black Ultragear finish | Sleek, professional aesthetic |
Pros & Cons
Pros
- 480 Hz refresh rate – world’s fastest gaming display
- 0.03 ms response time – no blur, no ghosting
- OLED panel with true black and infinite contrast
- G-Sync & FreeSync Premium Pro support
- DisplayPort 2.1 + HDMI 2.1 for next-gen GPUs & consoles
- Accurate 99% DCI-P3 color coverage
- True Black HDR for cinematic realism
- Full ergonomic adjustability
- OLED Care 2.0 anti-burn-in system
Cons
- Peak brightness limited vs mini-LED monitors
- Premium price point due to OLED and 480 Hz panel
- No built-in speakers (uses headphone out only)
Verdict – Should You Buy the LG 27GX790A-B Ultragear OLED?
The LG 27GX790A-B represents the pinnacle of 2025’s gaming display technology. Its 480 Hz OLED panel, QHD resolution, and 0.03 ms response make it a competitive powerhouse unmatched in clarity or speed.
Whether you’re a professional FPS player, esports enthusiast, or visual purist, this monitor guarantees a tactile, instantaneous experience that feels almost telepathic. Every click, flick, and frame appears exactly when you expect it.
Perfect for:
- Competitive FPS and eSports professionals
- High-end PC gamers using RTX 4000 or RX 7900 GPUs
- Streamers and content creators demanding color accuracy
- Gamers seeking OLED depth with extreme speed
Verdict:
A groundbreaking OLED display that redefines motion clarity and color fidelity in the gaming world — the new benchmark for high-refresh QHD monitors in 2025.
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