AOC Q27G40XMN
27" · 2560x1440 · Fast VA QD-Mini LED
- SDR brightness
- 400 nitsLocal dimming off
- SDR brightness
- 510 nitsLocal dimming on
Research snapshot: 2026-10-07
All findings and other attached tests →
Piqelo Monitors.Piqelo brings the measurements already attached to its research profiles into one explorable overview. The original labs performed these tests; Piqelo explains the decision and keeps each number tied to its source and settings.
Unspecified test conditions remain unknown. Different labs and modes are not blended into a leaderboard, and missing measurements do not count as a poor result.
Start with SDR for desktop work and HDR for highlights in games or video. A 2% window can be much brighter than a full-screen white page. Compare the same content type, window, picture mode and lab before treating one number as an upgrade.
34 exact-model profiles with an eligible attached measurement. Models are listed alphabetically; this is not a ranking.
27" · 2560x1440 · Fast VA QD-Mini LED
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 5120x2880 · Mini LED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 5120x2880 · IPS
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 6016x3384 · IPS
Public prose does not specify the peak test-window size.
Research snapshot: 2026-09-30 · 2026-10-07
All findings and other attached tests →27" · 2560x1440 · WOLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 2560x1440 · Tandem WOLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 3840x2160 · Tandem QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 3840x2160 · Tandem RGB OLED
One independently tested sample; lab settings and methods affect results.
Research snapshot: 2026-10-07
All findings and other attached tests →32" · 3840x2160 · Tandem QD-OLED
APL/window size was not specified for peak values unless attached; Uniform Brightness settings differ.
Research snapshot: 2026-09-30 · 2026-10-07
All findings and other attached tests →32" · 3840x2160 · WOLED
Research snapshot: 2026-09-30
All findings and other attached tests →34" · 3440x1440 · Tandem QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 3840x2160 · IPS
One independently tested sample; lab settings and methods affect results.
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 2560x1440 · QD-OLED
APL/window size was not specified for peak values unless attached; Uniform Brightness settings differ.
Research snapshot: 2026-09-30 · 2026-10-07
All findings and other attached tests →27" · 3840x2160 · QD-OLED
The cited prose does not specify the exact peak window size.
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 2560x1440 · QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 3840x2160 · Tandem RGB Stripe OLED
Maximum SDR brightness; exact tested 32-inch AW3226Q.
Research snapshot: 2026-10-16
All findings and other attached tests →34" · 3440x1440 · Penta Tandem QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →39" · 5120x2160 · RGB-stripe Tandem OLED
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 3840x2160 · QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 3840x2160 · Enhanced IPS Black
Exact 27-inch review unit; HDR window size is not specified beside the result.
Research snapshot: 2026-09-30 · 2026-10-07
All findings and other attached tests →32" · 3840x2160 · Enhanced IPS Black
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 3840x2160 · QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →40" · 5120x2160 · IPS Black
One independently tested sample; lab settings and methods affect results.
Research snapshot: 2026-09-30 · 2026-10-07
All findings and other attached tests →32" · 3840x2160 · QD-OLED
One independently tested sample; lab settings and methods affect results.
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 2560x1440 · QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 2560x1440 · RGB Tandem OLED
Research snapshot: 2026-09-30
All findings and other attached tests →45" · 5120x2160 · WOLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 2560x1440 · Rapid VA Mini LED
Exact model tested in Ukraine; the lab reports similar HDR luminance at 4% and 100% white. US retail-unit variation is untested.
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 3840x2160 · 4th Gen QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 3840x2160 · QD-OLED
One independently tested sample; lab settings and methods affect results.
Research snapshot: 2026-10-07
All findings and other attached tests →32" · 6144x3456 · Fast IPS
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 3840x2160 · QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 3840x2160 · QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 2560x1440 · OLED
25% window in Game mode; measurements using other modes or window sizes require separate comparison.
Research snapshot: 2026-09-30
All findings and other attached tests →Lower Delta E means less error under that test. A calibrated result does not describe factory accuracy. Color-space coverage, gamut volume and color error answer different questions; volume above 100% is not coverage.
15 exact-model profiles with an eligible attached measurement. Models are listed alphabetically; this is not a ranking.
27" · 5120x2880 · Mini LED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 5120x2880 · IPS
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 6016x3384 · IPS
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 2560x1440 · WOLED
Research snapshot: 2026-09-30
All findings and other attached tests →34" · 3440x1440 · Tandem QD-OLED
Gamut extent/volume must not be presented as absolute coverage; the Delta-E method is source-specific.
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 3840x2160 · IPS
X-Rite i1Display Pro Plus gamut readings are rough estimates for a wide-gamut panel.
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 3840x2160 · QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 3840x2160 · Enhanced IPS Black
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 3840x2160 · QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 2560x1440 · QD-OLED
Gamut extent/volume must not be presented as absolute coverage; the Delta-E method is source-specific.
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 2560x1440 · RGB Tandem OLED
Gamut extent figures must not be presented as coverage; method and picture mode remain attached.
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 3840x2160 · 4th Gen QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →32" · 6144x3456 · Fast IPS
Gamut extent/volume must not be presented as absolute coverage; the Delta-E method is source-specific.
Research snapshot: 2026-10-07
All findings and other attached tests →32" · 3840x2160 · QD-OLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 2560x1440 · OLED
Gamut extent/volume must not be presented as absolute coverage; the Delta-E method is source-specific.
Research snapshot: 2026-10-07
All findings and other attached tests →Pixel transitions, signal processing and the time to draw a full screen are separate measurements. Check refresh rate and method. A lower screen-draw number alone does not establish faster pixel response or lower total input lag.
11 exact-model profiles with an eligible attached measurement. Models are listed alphabetically; this is not a ranking.
27" · 2560x1440 · Fast VA QD-Mini LED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 2560x1440 · WOLED
Tom’s Hardware test method; total control lag must not be compared directly with processing-delay-only results.
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 2560x1440 · Tandem WOLED
Research snapshot: 2026-09-30
All findings and other attached tests →27" · 3840x2160 · Tandem RGB OLED
Response, signal processing and total lag are different metrics; do not compare across lab methods.
Research snapshot: 2026-10-07
All findings and other attached tests →34" · 3440x1440 · Tandem QD-OLED
Response, signal processing and total lag are different metrics; do not compare across lab methods.
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 3840x2160 · IPS
LDAT transition measurements are not interchangeable with full-screen draw or grey-to-grey specifications.
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 2560x1440 · QD-OLED
Response, signal processing and total lag are different metrics; do not compare across lab methods.
Research snapshot: 2026-10-07
All findings and other attached tests →34" · 3440x1440 · Penta Tandem QD-OLED
Response, signal processing and total lag are different metrics; do not compare across lab methods.
Research snapshot: 2026-10-07
All findings and other attached tests →39" · 5120x2160 · RGB-stripe Tandem OLED
Response, signal processing and total lag are different metrics; do not compare across lab methods.
Research snapshot: 2026-10-07
All findings and other attached tests →32" · 3840x2160 · QD-OLED
Response, signal processing and total lag are different metrics; do not compare across lab methods.
Research snapshot: 2026-10-07
All findings and other attached tests →27" · 2560x1440 · OLED
Response, signal processing and total lag are different metrics; do not compare across lab methods.
Research snapshot: 2026-10-07
All findings and other attached tests →Use the result to resolve a specific compromise: a dim full-screen desktop, visible color error in your chosen mode, or motion artifacts at the refresh rate you play. Compare like-for-like results and the full review's trade-offs before paying more. An unmatched headline peak or a larger refresh label alone is not enough evidence.
Compare the complete research and US buying options →