AOC G4 Q27G4KD 27″ 500Hz Monitor

27 inch · 2560 x 1440 · 500 Hz · OLED

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Screen size 27 inch
Resolution 2560 x 1440
Refresh rate 500 Hz
Panel OLED
Response time 0.03 ms

AOC G4 Q27G4KD 27″ 500Hz Monitor is a 27-inch monitor with 2560 x 1440 resolution, a 500 Hz refresh rate and OLED panel. The high refresh rate makes fast games look smoother. It came out in 2026.

Released: 2026-02-05

Specifications

Key specs

Screen size: 27 inch
Resolution: 2560 x 1440
Refresh rate: 500 Hz
Panel: OLED
Response time: 0.03 ms
Released: 2026-02-05
Part number: Q27G4KD

Display

Display diagonal: 68.6 cm (27")
Display resolution: 2560 x 1440 pixels
HD type: Quad HD
Native aspect ratio: 16:9
Display technology: QD-OLED
Panel type: OLED
LED backlight: Yes
Backlight type: QD
Display brightness (typical): 1000 cd/m²
Response time: 0.03 ms
Response time measurement type: GTG (Gray to Gray)
Screen shape: Flat
Contrast ratio (typical): 150000:1
Maximum refresh rate: 500 Hz
Viewing angle, horizontal: 178°
Viewing angle, vertical: 178°
Display number of colours: 1.07 billion colours
Pixel pitch: 0.2292 x 0.2292 mm
Viewable size, horizontal: 59 cm
Viewable size, vertical: 33.4 cm
Digital horizontal frequency: 30 - 510 kHz
Digital vertical frequency: 48 - 500 Hz
Display diagonal (metric): 67.3 cm
High Dynamic Range (HDR) supported: Yes
High Dynamic Range (HDR) technology: DisplayHDR True Black 500, High Dynamic Range 10 (HDR10)
DDC/CI: Yes
sRGB coverage (typical): 100%
DCI-P3 coverage: 99%

Performance

VESA Adaptive Sync support: Yes
Flicker-free technology: Yes
Low Blue Light technology: Yes
Game mode: Yes

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Design

Market positioning: Gaming
Product colour: Black, Red

Ports & interfaces

Built-in USB hub: Yes
USB hub version: 3.2 Gen 1 (3.1 Gen 1)
USB upstream port type: USB Type-B
Number of upstream ports: 1
Number of downstream ports: 2
Number of USB Type-B upstream ports quantity: 1
USB Type-A downstream ports quantity: 2
HDMI: Yes
HDMI ports quantity: 2
HDMI version: 2.1
DisplayPorts quantity: 1
DisplayPort version: 2.1
Headphone out: Yes
Headphone outputs: 1
Headphone connectivity: 3.5 mm
HDCP: Yes
HDCP version: 2.2

Ergonomics

VESA mounting: Yes
Panel mounting interface: 100 x 100 mm
Cable management: Yes
Cable lock slot: Yes
Height adjustment: Yes
Adjustable height (max): 13 cm
Pivot: Yes
Pivot angle: -90 - 90°
Swivelling: Yes
Swivel angle range: -30 - 30°
Tilt adjustment: Yes
Tilt angle range: -5 - 23°
Picture-in-Picture: Yes
On Screen Display (OSD): Yes
Plug and Play: Yes

Power

Energy efficiency class (SDR): Not available
Energy efficiency class (HDR): Not available
Power consumption (typical): 85 W
Power consumption (standby): 0.5 W
Power consumption (max): 115 W
AC input voltage: 100 - 240 V
AC input frequency: 50/60 Hz
Input current: 2 A

Operational conditions

Operating temperature (T-T): 0 - 40 °C
Storage temperature (T-T): -25 - 55 °C
Operating relative humidity (H-H): 10 - 85%
Storage relative humidity (H-H): 5 - 93%
Operating altitude: 0 - 5000 m
Non-operating altitude: 0 - 12192 m

Weight & dimensions

Width (with stand): 609.3 mm
Depth (with stand): 240 mm
Height (with stand): 537.7 mm
Weight (with stand): 6.54 kg
Width (without stand): 357.7 mm
Depth (without stand): 55 mm
Height (without stand): 357.7 mm
Weight (without stand): 5.08 kg

Other features

Low input lag: Yes
FPS counter: Yes
Dial point: Yes
Shadow control: Yes
Compliance certificates: CE
Certification: RoHs compliant,FCC

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About this product

26.5" QD-OLED 500Hz Gaming Monitor The AOC Q27G4KD redefines speed and clarity with its 26.5" QHD QD-OLED panel, delivering a blistering 500Hz refresh rate and 0.03ms GtG response for fluid, razor-sharp motion. VESA DisplayHDRTM True Black 500 ensures deep contrast and vivid color, while Adaptive Sync eliminates screen tearing. Game Mode, Dark Boost, Sniper Scope, and Shadow Control offer tactical visual enhancements, backed by 6-axis color tuning for precise calibration. Multitask effortlessly with PBP/PIP, and stay comfortable with Flicker-Free and Anti-Blue Light technologies. With DisplayPort 2.1 and HDMI 2.1 + DSC, it’s engineered for full-bandwidth performance and competitive dominance. ...

User manual (PDF)

Q27G4KD vs similar monitors

	AOC G4 Q27G4KD 27″ 500Hz Monitor	Samsung LS27FG602SNXZA 27″ 500Hz Monitor	Samsung LS27DG600SNXZA 27″ 360Hz Monitor	AOC AG276QZD/69 27″ 240Hz Monitor
Screen size	27 inch	27 inch	27 inch	27 inch
Resolution	2560 x 1440	2560 x 1440	2560 x 1440	2560 x 1440
Refresh rate	500 Hz	500 Hz	360 Hz	240 Hz
Panel	OLED	OLED	OLED	OLED
Response time	0.03 ms	0.03 ms	0.03 ms	0.03 ms
Released	2026	2026	2026	2026