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27-inch glossy Mini-LED gaming monitor with 1152 dimming zones

AOC Monitors

AOC Monitors Q27G4ZMN 27" Mini-LED Gaming Monitor 240Hz 1ms DisplayHDR 1000 1152 Dimming Zones

SKU CH-JEX6-70H8K

A 27-inch QHD gaming monitor with Mini-LED backlighting, 240 Hz refresh rate, 1 ms response time, DisplayHDR 1000 certification and 1152 dimming zones

  • Screen size27 in (68.6 cm)
  • Display resolution2560 × 1440 (2K)
  • Refresh frequency240 Hz
  • Pixel response time1 ms
  • Display formatQHD
  • Variable refresh rateAdaptive Sync
  • Crisp 2560x1440 detail from mini-LED backlighting with 1152 dimming zones
  • 240Hz refresh rate and 1ms response time eliminate motion blur in fast games
  • DisplayHDR 1000 certification delivers high peak brightness and accurate HDR colour
  • Adaptive-Sync removes tearing across AMD and NVIDIA graphics cards
  • Shadow Control, Game Modes, Flicker-Free and Low Blue Light optimise comfort and visibility

27-inch Mini-LED QHD gaming monitor

The 27-inch panel uses Mini-LED backlighting with 1152 dimming zones to produce deep blacks and bright highlights at a 2560 x 1440 resolution. A 240 Hz refresh rate and 1 ms GtG response time target competitive players who need fluid motion in fast-paced titles. Adaptive-Sync support keeps frame delivery smooth across both AMD and NVIDIA graphics cards.

Sustained HDR brightness and local-dimming behaviour

DisplayHDR 1000 certification confirms the screen can reach high peak brightness for HDR content without throttling during extended sessions. The 1152 dimming zones adjust independently, maintaining contrast and limiting halo artefacts when bright objects move across dark backgrounds over long periods. Flicker-Free and Low Blue Light features reduce eye strain during marathon gaming or creative work.

DisplayPort-driven 240 Hz limit and HDR scope

The 240 Hz refresh rate is achieved over DisplayPort; other inputs may not support the full rate. DisplayHDR 1000 defines the monitor's HDR brightness and contrast envelope, so content mastered for higher specifications will be tone-mapped to this level. The 16:9 aspect ratio and fixed 2560 x 1440 pixel grid set the spatial limits for all sources.

How it compares

Measured against everything we stock in Monitors for Gamers, at today’s prices. Recalculated every night.

Price $371.99
Pricier than about 77% of the 839 comparable items (median $189.99).
Screen size 27 in (68.6 cm)
Typical for this category: the median of 814 items is 27 in.
Refresh frequency 240 Hz
Higher than about 70% of the 735 comparable items (median 180 Hz).

Specifications

Product
Brand nameAOC
Case colorGlossy
Display
Screen size27 in (68.6 cm)
Display resolution2560 × 1440 (2K)
Refresh frequency240 Hz
Pixel response time1 ms
Widescreen formatYes
Display formatQHD
Variable refresh rateAdaptive Sync
Screen ratio16:9
DisplayHDR certificationDisplayHDR 1000
Horizontal scan rate240 Hz

Questions about this item

How loud does the 27 inch 240Hz panel get when running all day?

The 27 inch QHD Mini-LED panel uses 1152 dimming zones and a glossy surface without active cooling, so it operates silently during extended sessions.

What cable and graphics output do I need to reach 2560x1440 at 240Hz?

You need a DisplayPort cable and a GPU that supports 240Hz at 1440p to unlock the full 240Hz refresh rate and 1ms response time.

Will Adaptive-Sync work with my older AMD or NVIDIA card at 1440p?

Adaptive-Sync is compatible with both AMD and NVIDIA GPUs, eliminating tearing and stuttering at 2560x1440 across supported drivers.

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