Tested by IMartz

AOC Q27G4ZDR

Name: AOC Q27G4ZDR
Brand: AOC

Inexpensive 240 Hz QD-OLED with full-bandwidth HDMI 2.1 and aggressive pricing, but with cutbacks: low brightness, weak HDR and factory calibration that clearly needs improvement.

PanelQD-OLED

Versions and related models

You are viewing AOC Q27G4ZDR. Each model retains its own price, specifications and test results.

IMartz verdict

Pros

Very good motion performance, with the virtually instant response times typical of OLED.
Good connectivity, with full-bandwidth HDMI 2.1, DisplayPort 1.4 and a USB hub.
Very wide SDR color gamut coverage, especially in DCI-P3 and Adobe RGB, although more limited in HDR

Things to consider

Low SDR brightness compared with other OLEDs using the same panel.
Weak HDR, without a useful peak-brightness mode and below expectations for a current OLED.
Mediocre factory calibration, especially whites, grayscale and color temperature.

A good fit if…

Those who want to get into OLED at the lowest possible cost and find a very large discount.
Fast PC gaming where response, contrast and 240 Hz matter a lot.
Wide color gamut and infinite contrast for little money.

Consider another option if…

You want a balanced 1440p OLED that is well tuned out of the box.
You want impactful HDR or high SDR brightness.
Its price is close to other 1440p OLEDs with better brightness, calibration or HDR.

Measurements and specifications

IMartz test results. See each section for the measurement conditions.

Display and format

General specifications

Panel

QD-OLED

Resolution

1440p

Refresh rate

240 Hz

Screen size

26.5"

Aspect ratio

16:9

Curvature

Flat

Screen finish

Glossy

Speakers

SDR performance

Color, brillo, contraste y comportamiento básico fuera de HDR.

SDR assessmentExcellent

Coverage

DCI-P3

99.7 %

Adobe RGB

97.6 %

Accuracy and calibration

DCI-P3 accuracy

3.27

sRGB mode

Yes

sRGB accuracy

2.63

Test note

but grayscale is less accurate

Brightness uniformity

Acceptable

Colour uniformity

Very good

HDR performance

Brillo pico, volumen de color, EOTF y experiencia HDR real.

HDR assessmentExcellent

HDR brightness and color

BT.2020 coverage

70.6 %

BT.2020 colour volume

65.1 %

Accuracy and tracking

EOTF tracking

Acceptable

Test note

DisplayHDR darkens shadows and midtones somewhat relative to the reference. Brightness is limited to around 400 nits in small windows and falls as the lit area grows. Game behaves similarly; Movie and Picture reduce highlights further. There is no peak mode to recover that headroom.

OLED brightness

Datos específicos de brillo en OLED, APL y desbloqueos relevantes.

OLED brightness assessmentMediocre

Brightness measurements

SDR 100% APL

206 nits

HDR 10% APL

396 nits

HDR 2% APL

Peak HDR 10%

OLED uniform brightness

Good

OLED brightness unlock

Response time and PC gaming

Overdrive, tiempo de respuesta, overshoot, VRR e input lag.

Gaming ratingVery fast

Response measurements

Response time

1.02 ms

Overshoot

0.87 RGB

Input lag

1.8 ms

Features and settings

VRR PC

Yes

MBR / Strobing

PS5 and consoles

Compatibilidad con VRR, ALLM y resoluciones permitidas.

PS5 assessmentFull support

Compatibility

VRR PS5

Yes

ALLM PS5

Yes

PS5 resolutions

1440p 120 Hz
4K 120 Hz

OLED characteristics

Subpíxel, claridad de texto, protecciones y limitaciones del panel.

OLED assessmentExcellent

Panel and text

Subpixel layout

Triangular QD-OLED

Text clarity

Acceptable

Protection and extras

Burn-in protections

Full support

Limitations

Magenta tint, limited QD-OLED implementation, text clarity/fringing could be better

Connectivity

Entradas de vídeo, USB-C, KVM, hub USB y extras de conexión.

Video

HDMI

2 × Full-bandwidth HDMI 2.1

DisplayPort

1 × DisplayPort 1.4

Additional connections

USB hub

2x USB-A + 1x USB-B upstream

Audio output

Yes

Other ports

Kensington Lock

Stand, mounting and extras

Calidad física, ergonomía, VESA y detalles destacables.

RatingGood

Ergonomics and mounting

Stand adjustments

Yes

Stand quality

Good

VESA

Yes

Extras

Notable extras

The typical AOC OSD buttons are very awkward.

Photos and test results

Open an image to view the full-size charts and browse the tests.

AOC Q27G4ZDR · Brightness by area · Warm — **Brightness by area · Warm**

AOC Q27G4ZDR · Brightness by area · User — **Brightness by area · User**

AOC Q27G4ZDR · Brightness by monitor setting — **Brightness by monitor setting**

Grayscale and gamma

AOC Q27G4ZDR · Grayscale · Warm — **Grayscale · Warm**

AOC Q27G4ZDR · Grayscale · User — **Grayscale · User**

AOC Q27G4ZDR · Grayscale · sRGB mode — **Grayscale · sRGB mode**

AOC Q27G4ZDR · Grayscale · DCI-P3 mode — **Grayscale · DCI-P3 mode**

Colour gamut and accuracy

AOC Q27G4ZDR · DCI-P3 coverage · Native — **DCI-P3 coverage · Native**

AOC Q27G4ZDR · ColorChecker DCI-P3 · Native — **ColorChecker DCI-P3 · Native**

AOC Q27G4ZDR · Adobe RGB coverage · Native — **Adobe RGB coverage · Native**

AOC Q27G4ZDR · ColorChecker Adobe RGB · Native — **ColorChecker Adobe RGB · Native**

AOC Q27G4ZDR · sRGB coverage · Native — **sRGB coverage · Native**

AOC Q27G4ZDR · Coverage · sRGB mode — **Coverage · sRGB mode**

AOC Q27G4ZDR · ColorChecker · sRGB mode — **ColorChecker · sRGB mode**

AOC Q27G4ZDR · Coverage · DCI-P3 mode — **Coverage · DCI-P3 mode**

AOC Q27G4ZDR · ColorChecker · DCI-P3 mode — **ColorChecker · DCI-P3 mode**

Brightness and uniformity

AOC Q27G4ZDR · Color uniformity — **Color uniformity**

AOC Q27G4ZDR · Brightness uniformity — **Brightness uniformity**

Calibration

Luminance and EOTF

AOC Q27G4ZDR · Brightness by lit area — **Brightness by lit area**

AOC Q27G4ZDR · EOTF · DisplayHDR · 10 % — **EOTF · DisplayHDR · 10 %**

AOC Q27G4ZDR · EOTF · HDR Game · 10 % — **EOTF · HDR Game · 10 %**

AOC Q27G4ZDR · EOTF · HDR Movie · 10 % — **EOTF · HDR Movie · 10 %**

AOC Q27G4ZDR · EOTF · HDR Picture · 10 % — **EOTF · HDR Picture · 10 %**

AOC Q27G4ZDR · EOTF · DisplayHDR · 2 % — **EOTF · DisplayHDR · 2 %**

AOC Q27G4ZDR · EOTF · DisplayHDR · 25 % — **EOTF · DisplayHDR · 25 %**

AOC Q27G4ZDR · EOTF · DisplayHDR · 50 % — **EOTF · DisplayHDR · 50 %**

AOC Q27G4ZDR · EOTF · DisplayHDR · 100 % — **EOTF · DisplayHDR · 100 %**

HDR colour

AOC Q27G4ZDR · DCI-P3 coverage — **DCI-P3 coverage**

AOC Q27G4ZDR · DCI-P3 saturation — **DCI-P3 saturation**

AOC Q27G4ZDR · BT.2020 coverage — **BT.2020 coverage**

AOC Q27G4ZDR · BT.2020 saturation — **BT.2020 saturation**

AOC Q27G4ZDR · ColorMatch HDR — **ColorMatch HDR**

AOC Q27G4ZDR · HDR color volume — **HDR color volume**

Alternatives

Other options, each with its own specifications and test results.

AOC Q27G4ZDR

Versions and related models

IMartz verdict