In-Depth Review: SANSUI 34-Inch Curved Gaming Monitor (ES-G34C5) – A Feature-Packed Ultrawide Contender

The LG 39" UltraGear OLED Curved Gaming Monitor is a cutting-edge display that combines OLED technology, an ultra-fast refresh rate, steep curvature, and advanced gaming features into a single, immersive package.

Designed for serious gamers, creative professionals, and tech enthusiasts, this monitor delivers stunning visual fidelity, lightning-fast responsiveness, and a futuristic form factor that challenges traditional display design norms.

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In this review, we’ll explore all facets of this monitor: from its hardware specifications, panel performance, and gaming capabilities, to its ergonomics, connectivity options, and day-to-day utility.

1. Display Technology and Resolution

At the core of this monitor is a 39-inch OLED panel with a WQHD resolution (3440 x 1440). This ultrawide format provides ample horizontal screen real estate, making it ideal for multitasking, immersive gaming, and video editing. The use of OLED (Organic Light Emitting Diode) technology means that each pixel is self-illuminated, allowing for perfect blacks, infinite contrast, and superior color accuracy compared to traditional LED displays.

With a 1.5 million-to-1 contrast ratio, dark scenes in games and movies appear truly black rather than washed-out gray. Whether you're gaming in a dimly lit room or editing footage with subtle shadows, this level of contrast gives a significant advantage.

2. Curvature and Immersive Experience

The display features an 800R curvature, which is among the steepest curves on the market. This means the monitor wraps more tightly around the viewer than standard 1000R or 1500R screens, mimicking the natural curvature of the human eye. The result is an enhanced peripheral viewing experience that reduces eye movement across the screen and increases visual immersion, especially in fast-paced first-person shooters (FPS), simulators, and racing games.

This curvature can make multitasking more fluid as well, enabling users to see more content without turning their heads.

3. Refresh Rate and Response Time

The 240Hz refresh rate combined with an ultra-fast 0.03ms (GtG) response time makes this monitor ideal for competitive gaming. High refresh rates reduce motion blur and ghosting, giving gamers a fluid and highly responsive experience. Whether you're navigating high-speed corners in racing games or engaging in intense PvP battles, every frame is delivered with surgical precision.

This low latency performance is especially beneficial in eSports titles like Valorant, Fortnite, or Call of Duty, where split-second decisions and rapid reactions define the outcome of matches.

4. NVIDIA G-Sync and AMD FreeSync Premium Pro Compatibility

The LG UltraGear monitor is officially NVIDIA G-Sync Compatible and also supports AMD FreeSync Premium Pro, meaning it can dynamically adjust its refresh rate to match your GPU output. This prevents screen tearing and stuttering, offering buttery smooth gameplay even during demanding scenes or variable frame rates.

By supporting both major adaptive sync technologies, LG ensures that the monitor is fully compatible with a wide range of graphics cards, enhancing its longevity and versatility for users who may upgrade hardware over time.

5. HDR Performance

Certified with VESA DisplayHDR True Black 400, the monitor supports HDR10 content and is capable of reaching deep black levels and high color depth. The “True Black” distinction is particularly important because it indicates that the monitor excels at low luminance detail, something conventional HDR monitors often struggle with.

This HDR capability is most noticeable in games and films with a wide dynamic range—think dark underground dungeons, nighttime battlefields, or high-contrast sci-fi scenes. The display's ability to handle subtle gradations in black enhances realism and mood.

6. Color Reproduction and Accuracy

The OLED panel delivers excellent color coverage, including 98.5% of the DCI-P3 color gamut, ensuring accurate, rich, and saturated colors. This makes the display not only excellent for gaming but also suitable for color-critical work, such as photo and video editing, digital art, and 3D rendering.

The monitor supports 8-bit+FRC color depth, and with OLED’s pixel-level control, there’s no backlight bleed or haloing, maintaining consistency across the panel.

7. Design and Build Quality

LG has engineered this monitor with a sleek, minimalist aesthetic, optimized for gaming setups and professional environments alike. Its ultra-thin bezels and borderless screen maximize screen space while minimizing distractions.

The anti-glare coating is highly effective at reducing reflections, allowing the OLED panel to shine in brightly lit environments without compromising visual clarity.

8. Connectivity and Ports

Connectivity is one of the strengths of this monitor. It includes:

2x HDMI 2.1 ports

1x DisplayPort 1.4

1x USB Type-C (DisplayPort Alt Mode + Power Delivery)

3.5mm audio out

USB 3.0 hub ports

The inclusion of USB-C is particularly important for modern users, allowing for video output, data transfer, and power delivery for laptops—ideal for MacBook Pro and ultrabook users who want a single-cable solution.

This makes the monitor incredibly flexible, able to serve both gaming desktops and professional workstations without compromise.

9. Audio and Speakers

The monitor includes built-in stereo speakers, which, while not a replacement for a dedicated sound system, offer decent sound for casual use. They are loud enough for YouTube videos, system sounds, and background music during work sessions.

Gamers or audiophiles will likely prefer external speakers or gaming headsets, but the integrated audio adds a level of convenience when external options aren't available.

10. Real-World Use Cases

For Gaming:

This is where the LG UltraGear OLED shines brightest. Its ultrawide format, quick response time, and high refresh rate combine to create a flawless gaming environment. Games like Cyberpunk 2077, Red Dead Redemption 2, and Microsoft Flight Simulator look stunning on this display, with lifelike colors and immersive panoramic views.

For Productivity:

Multitasking is intuitive with the wide aspect ratio, especially when working in multiple windows or across timelines in Adobe Premiere Pro. Text is sharp and readable, while color-sensitive work benefits from the OLED's precision.

For Entertainment:

Watching 21:9 movies and high-definition content in HDR is an absolute treat. Streaming services like Netflix, Apple TV+, and Disney+ offer HDR content that the monitor can fully take advantage of.

11. Considerations and Limitations

Burn-in Risk: As with all OLED displays, users should be cautious about static elements (like HUDs or desktop icons) remaining on-screen for extended periods. LG includes pixel refresh features and screen savers to mitigate this risk.

Price Point: This is a premium display, and its pricing reflects that. It's targeted at serious gamers and professionals who value quality over budget.

Steep Curvature: The aggressive 800R curve may not be ideal for all types of work, particularly for users needing perfectly straight lines for CAD or architectural work.

Conclusion: A Display That Pushes the Limits

The LG 39" UltraGear OLED Curved Gaming Monitor is a flagship-class display that combines raw performance, elegant design, and innovative technology to redefine what a gaming monitor can be. With ultrafast responsiveness, rich HDR visuals, deep blacks, and a cinematic ultrawide experience, it excels across a variety of use cases from gaming to content creation.

If you’re looking for a monitor that offers both visual excellence and next-gen performance, and you’re ready to invest in a premium tool for entertainment and productivity, this UltraGear OLED monitor is a standout choice.