AOC U27G4 27-Inch 4K UHD Fast IPS Dual-Mode Gaming Monitor

Product Overview

The AOC U27G4 is a high-performance 27-inch gaming monitor designed for gamers who want both ultra-sharp 4K visuals and extremely high refresh rates. Its innovative Dual Refresh Rate design allows you to choose between 4K UHD 3840 × 2160 resolution at up to 160Hz or Full HD 1920 × 1080 resolution at up to 320Hz.

This gives gamers the flexibility to prioritize image detail for immersive gaming and content or switch to an ultra-high refresh rate for competitive and fast-paced gaming.

Built around a Fast IPS panel, the U27G4 combines fast response performance with wide viewing angles and impressive color reproduction. VESA DisplayHDR 400, HDMI 2.1, DisplayPort 1.4, and G-SYNC Compatible support further enhance its capabilities for modern gaming systems.

Dual-Mode Gaming – 4K 160Hz or FHD 320Hz

The standout feature of the AOC U27G4 is its dual-resolution refresh rate capability.

• 4K UHD Mode: 3840 × 2160 resolution at up to 160Hz
• Full HD Mode: 1920 × 1080 resolution at up to 320Hz

4K mode is ideal when visual detail and image quality are the priority, while the 320Hz Full HD mode is designed for competitive gaming where extremely smooth motion and responsiveness are important.

27-Inch Fast IPS Panel

The 27-inch Fast IPS panel combines responsive gaming performance with excellent viewing angles and rich color reproduction. It is suitable for gaming, entertainment, creative applications, multimedia, and everyday professional use.

4K UHD Resolution

At 3840 × 2160 resolution, the U27G4 delivers four times the pixel count of conventional Full HD, providing detailed game environments, sharp text, and excellent image clarity.

Up to 320Hz for Competitive Gaming

Switching to Full HD mode enables refresh rates up to 320Hz, providing exceptionally smooth motion for competitive titles and other fast-paced games when paired with compatible graphics hardware.

Ultra-Fast Response Performance

The U27G4 offers fast MPRT response performance:

• UHD Mode: 0.5ms MPRT
• FHD Mode: 0.3ms MPRT

This high-speed performance helps improve motion clarity during fast-moving gameplay.

VESA DisplayHDR 400

VESA DisplayHDR 400 support enhances compatible HDR content with improved brightness, contrast, and visual impact, providing a more immersive experience in supported games, movies, and multimedia.

High Color Performance

The Fast IPS display supports up to 1.07 billion colors and offers wide color gamut coverage, making the U27G4 suitable for users who value both gaming performance and vibrant visual reproduction.

HDMI 2.1 & DisplayPort 1.4

The AOC U27G4 provides modern high-bandwidth display connectivity including two HDMI 2.1 ports and one DisplayPort 1.4 connection.

These interfaces provide flexible connectivity for compatible gaming PCs, graphics cards, consoles, and other supported devices.

G-SYNC Compatible

G-SYNC Compatible variable refresh rate support helps synchronize compatible graphics output with the monitor to provide smoother gameplay and reduce visible screen tearing.

Ergonomic Gaming Stand

The monitor provides ergonomic adjustment options including height adjustment, tilt, swivel, and pivot, allowing users to customize the screen position for a more comfortable gaming or working setup.

Key Features

• 27-inch Fast IPS gaming monitor
• Dual-resolution gaming modes
• 4K UHD 3840 × 2160 at up to 160Hz
• Full HD 1920 × 1080 at up to 320Hz
• 0.5ms MPRT in UHD mode
• 0.3ms MPRT in FHD 320Hz mode
• VESA DisplayHDR 400
• G-SYNC Compatible
• Up to 1.07 billion display colors
• 350 nits typical SDR brightness
• HDMI 2.1 × 2
• DisplayPort 1.4 × 1
• 3.5mm headphone output
• 100 × 100mm VESA wall mount support
• Height, tilt, swivel and pivot adjustment
• Designed for competitive and immersive gaming

Technical Specifications

Ideal For

• Competitive Gaming
• Esports Gaming
• 4K PC Gaming
• FPS & Action Games
• Racing & Sports Games
• High-End Gaming PCs
• Multimedia & Entertainment
• Content Creation
• Professional Workstations

Important Refresh Rate Note

320Hz is available at Full HD 1920 × 1080 resolution. At 4K UHD 3840 × 2160 resolution, the monitor supports up to 160Hz.

Maximum resolution and refresh rate depend on the connected graphics hardware, display interface, cable, operating system settings, and other system capabilities.

Frequently Asked Questions

Is the AOC U27G4 a 4K gaming monitor?

Yes. The U27G4 supports 3840 × 2160 4K UHD resolution at up to 160Hz.

Does the AOC U27G4 support 320Hz?

Yes. The monitor supports up to 320Hz when operating at Full HD 1920 × 1080 resolution.

Does it run 4K at 320Hz?

No. Its dual-mode design provides up to 160Hz at 4K UHD and up to 320Hz at Full HD.

What panel does the AOC U27G4 use?

The monitor uses a 27-inch Fast IPS panel.

Does the AOC U27G4 support HDR?

Yes. It is VESA DisplayHDR 400 certified.

Does it have HDMI 2.1?

Yes. The U27G4 provides two HDMI 2.1 ports along with one DisplayPort 1.4 connection.

Is the AOC U27G4 suitable for competitive gaming?

Yes. Its Full HD 320Hz mode and fast response performance are designed for high-speed and competitive gaming.

What is the warranty?

The product is offered with a 1-year warranty.