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AOC’s two new G4 gaming monitors take different routes: the 27-inch U27G4XM combines 4K resolution and MiniLED local dimming with a lower-resolution, high-refresh mode, while the 24.5-inch 25G4KUR prioritizes very high refresh at 1080p. The choice is chiefly between resolution and dimming features on one side, and a higher refresh-rate ceiling on the other. Specifications and UK prices below come from AOC’s product pages; independent performance testing is not available in the cited sources.
How the two AOC monitors differ
| Feature | AOC U27G4XM | AOC 25G4KUR |
|---|---|---|
| Screen size and panel | 27-inch Fast IPS with MiniLED backlight | 24.5-inch Fast IPS |
| Resolution | 3840 × 2160 (UHD), with a 1920 × 1080 (FHD) Dual Frame Mode | 1920 × 1080 (FHD) |
| Refresh-rate modes | 160Hz at UHD or 320Hz at FHD, according to AOC | 400Hz native; up to 420Hz with overclocking, according to AOC |
| Local dimming and HDR | 1,152 local-dimming zones; VESA Certified DisplayHDR 1000 | VESA Certified DisplayHDR 400; local-dimming zones not stated on AOC’s cited page |
| Connections and extras listed | HDMI 2.1, one DisplayPort 1.4, USB hub, PiP/PbP | USB hub |
| Mounting and stand | 100 × 100 mm VESA mounting; adjustable stand reported by BetaNews | Adjustable stand and 100 × 100 mm VESA mounting |
| UK price shown on AOC page when the cited pages were accessed in 2026 | From £349.00; price and stock can change | From £178.97; price and stock can change |
The specifications in this comparison are manufacturer listings unless otherwise noted. See AOC’s U27G4XM product page and 25G4KUR product page for their UK listings. BetaNews reported UK launch prices of £399.99 for the U27G4XM and £209.99 for the 25G4KUR; those are launch figures, not the current starting prices shown on AOC’s pages. BetaNews’ announcement was last updated January 2, 2026.
What the U27G4XM offers
The U27G4XM is the larger, higher-resolution option. AOC lists a 27-inch 3840 × 2160 Fast IPS panel, a MiniLED backlight, and 1,152 local-dimming zones. Its Dual Frame Mode provides a choice between 160Hz at UHD and 320Hz at FHD, according to the manufacturer. Switching to FHD raises the stated refresh ceiling but reduces resolution; it is not a way to get both 4K detail and 320Hz simultaneously.
AOC also lists VESA Certified DisplayHDR 1000, Adaptive Sync, NVIDIA G-SYNC Compatible, HDMI 2.1, one DisplayPort 1.4, a USB hub, and picture-in-picture and picture-by-picture modes. Its page specifies a 1ms GtG response time. These are listed capabilities, not independent measurements of motion clarity, input lag, HDR brightness in use, or image quality.
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- ULTRA-FAST GAMING: Experience gaming at a new level with a 280Hz refresh rate and 0.3ms response time, delivering unparalleled smoothness and precision.
- CURVED FOR IMMERSION: The 1500R curvature provides a more engaging and immersive viewing experience, perfect for gaming and multimedia.
- VIVID COLORS AND CONTRAST: Enjoy vibrant visuals with HDR readiness and a high dynamic contrast ratio, enhancing every detail in your games and movies.
- COMFORT AND FLEXIBILITY: Flicker-Free technology and Adaptive Sync combine to ensure comfort during long gaming sessions and fluid, tear-free gameplay.
- ERGONOMIC DESIGN: Features extensive adjustability with tilt, swivel, and height options, along with VESA compatibility for diverse mounting possibilities.
AOC describes the mode this way: “Dual Frame Mode (DFM) on AOC monitors offers unparalleled flexibility, allowing users to harness the power of UHD 3840×2160 resolution at an ultra-smooth 160Hz refresh rate.” The quoted wording is manufacturer promotional copy; the listed modes themselves are 160Hz at UHD and 320Hz at FHD.
What the 25G4KUR offers
The 25G4KUR is a smaller 24.5-inch Fast IPS monitor with a fixed FHD resolution of 1920 × 1080. AOC lists 400Hz as its native refresh rate and up to 420Hz when overclocked. The overclocked figure is not the same as the native specification and requires enabling the monitor’s overclocking mode.
Rank #2
- 27” QHD IPS DISPLAY: Enjoy stunning detail and vibrant color with a 2560x1440 Quad HD resolution on a 27-inch IPS panel, offering wide viewing angles and precise image quality.
- 240HZ REFRESH RATE & 0.3MS RESPONSE TIME: Take competitive gaming to the next level with a blazing-fast 240Hz refresh rate (via DisplayPort) and ultra-responsive 0.3ms MPRT for minimal blur and maximum clarity.
- ADAPTIVE-SYNC SUPPORT: Say goodbye to screen tearing and input lag with Adaptive-Sync for fluid, uninterrupted performance across both AMD and NVIDIA GPUs.
- TILT ADJUSTMENT: Customize your setup with -3° to +21° tilt range for ergonomic positioning.
- ENHANCED GAMING FEATURES: Includes Shadow Control, Game Mode presets, and a user-friendly graphical OSD menu for fast and intuitive performance tuning.
AOC lists Adaptive Sync, NVIDIA G-SYNC Compatible, VESA Certified DisplayHDR 400, a USB hub, an adjustable stand, 100 × 100 mm VESA mounting, and a 1ms GtG response time. As with the other monitor, these figures and compatibility labels do not establish real-world input lag or comparative image performance.
Which one fits your use?
Choose the U27G4XM if resolution and dimming matter more
- You want a 4K-capable 27-inch screen for games and other detailed content.
- You value MiniLED local dimming and the manufacturer’s DisplayHDR 1000 certification.
- You want the option of a 320Hz FHD mode, accepting the resolution drop when using that mode.
- You need the listed HDMI 2.1, DisplayPort 1.4, or PiP/PbP features.
Consider the 25G4KUR if refresh rate is the priority
- You prefer a compact 24.5-inch screen and are content with 1080p.
- You want AOC’s listed 400Hz native refresh, with 420Hz available through overclocking.
- You would rather pay the lower UK starting price shown on AOC’s page than opt for the 4K MiniLED model.
Neither specification sheet proves which monitor will feel better in a particular game. The sources cited here do not provide independent measurements of input lag or comparative image-quality tests, so treat response time, refresh, HDR, and performance statements as manufacturer claims rather than verified results.
Rank #3
- Immersive Visuals: 32-inch curved QHD (2560x1440) VA panel with a 1500R curvature for an immersive gaming experience, featuring a 180Hz refresh rate and 0.5ms response time (MPRT) for smooth and responsive gameplay.
- Wide Color Gamut: Covers over 120% of the sRGB color space and boasts an 80,000,000:1 SmartContrast ratio, delivering vibrant and lifelike images with deeper blacks and brighter colors.
- Seamless Connectivity: Equipped with 2x DisplayPort 1.4, 2x HDMI 2.0 ports, and an audio line-out for convenient connectivity to gaming consoles, laptops, and desktops.
- Eye Care and Warranty: AOC LowBlue Mode and Flicker-Free Technology for comfortable extended gaming sessions, backed by a 3-year zero-bright-dot warranty, 3-year advance replacement, and 1-year accidental damage coverage.
- BETTER CONSOLE GAMING: AGON by AOC gaming monitors are designed to maximize the performance of your consoles by unleashing up to 120Hz frame rate (exact performance depends on consoles) and ultra low latency, giving you an edge over your opponents
Price, availability, and model names
AOC’s UK product pages showed starting prices of £349.00 for the U27G4XM and £178.97 for the 25G4KUR when accessed in 2026, with availability through UK retail stores. Prices and stock may change. BetaNews’ reported launch prices—£399.99 and £209.99 respectively—refer to launch context and should not be read as current prices. These sources establish UK listings only; they do not establish availability or pricing in other countries.
Check the full model names when comparing listings: this announcement covers the U27G4XM and 25G4KUR, not the similarly named 27G4ZR or 24G4ZR. AOC lists 100 × 100 mm VESA mounting for both models, which may suit a compatible monitor arm; check the arm’s load rating and fit. AOC’s product pages indicate HDMI and DisplayPort cables are included, so those cables are not necessary add-ons based on the listings.
Quick Recap
Best Value
- SHARP CLARITY: This 27″ AOC gaming monitor delivers crisp Full HD visuals. Enjoy games, movies, and videos with remarkable detail, all wrapped in a 3-sided frameless design, perfect for multi-monitor setups
- SPEED INTO VICTORY: Lightning-fast 200Hz refresh rate and rapid 1ms MPRT response time lets you target moving opponents with precision. With Adaptive-Sync and low input lag, fast-moving action and dramatic transitions will be rendered smoothly without the effects of ghosting
- ASTONISHING COLORS: Enjoy true-to-life images and vivid colors with 121% sRGB wide color gamut. HDR10 brings more details and nuance to your screen, elevating your viewing experience
- FULLY ERGONOMIC STAND: The height, swivel, & tilt adjustable stand with VESA compatibility and quick release function offers maximum comfort and optimum viewing angles. The pivot function rotates the monitor from landscape to portrait mode for more vertical working space, ideal for coding & browsing
- THE ULTIMATE BATTLE STATION: This sleek gaming monitor is frameless on three sides, so you get minimal bezel distraction. Enjoy next level immersion by creating your own seamless multi-monitor setup
Rank #4
- SHARP CLARITY: This 24'' class (23.8″ viewable) AOC gaming monitor delivers crisp Full HD visuals. Enjoy games, movies, and videos with remarkable detail, all wrapped in a 3-sided frameless design, perfect for multi-monitor setups
- SPEED INTO VICTORY: Lightning-fast 200Hz refresh rate and rapid 1ms MPRT response time lets you target moving opponents with precision. With Adaptive-Sync and low input lag, fast-moving action and dramatic transitions will be rendered smoothly without the effects of ghosting
- ASTONISHING COLORS: Enjoy true-to-life images and vivid colors with 116% sRGB wide color gamut. Elevate your viewing experience with HDR ready
- THE ULTIMATE BATTLE STATION: This sleek gaming monitor is frameless on three sides, so you get minimal bezel distraction. Enjoy next level immersion by creating your own seamless multi-monitor setup
- BETTER CONSOLE GAMING: AOC gaming monitors are designed to maximize the performance of your consoles by unleashing up to 120Hz frame rate (exact performance depends on consoles) and ultra low latency with its low input lag mode, giving you an edge over your opponents
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
