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Straight-on view · Illustration
A budget 27-inch 1440p IPS gaming monitor with a 180Hz refresh rate and a tilt-only stand.
HannahRev Test Bench · demo dataset · Reviewed · Updated
Demo data. This product and brand are fictional. Scores, measurements and notes on this page are illustrative values used to build the HannahRev review template — they are not laboratory results.
The Kestrova K27F-180 is an inexpensive 27-inch 1440p IPS monitor with a 180Hz refresh rate. It focuses on the basics for gaming and leaves out extras such as USB ports and a height-adjustable stand.
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Every score is calculated from the measurements further down this page. Expand a score to see its ingredients.
Overall
Mean of the four usage scores
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Demo rubric. Each scored metric is mapped linearly onto 0–10 between a 'worst' and a 'best' anchor and clamped. A test group score is the weighted mean of its metric scores. A usage score is the weighted mean of its group scores; groups marked not applicable are dropped and the remaining weights are re-normalised. The overall score is the mean of the four usage scores. Anchors and weights are placeholders until HannahRev publishes its production methodology.
A good value gaming monitor. Motion handling and input lag are solid for the price, and the matte coating copes well with bright rooms. The tilt-only stand and limited colour gamut are the main compromises.
Key measurements against the alternatives we recommend considering.
The K27F-180 is the budget option in the demo set; the alternatives all offer better picture quality at a higher cost.
| Metric | Kestrova K27F-180 This product | |||
|---|---|---|---|---|
| Overall score | 5.4 | 7.8 | 7.4 | 5.9 |
| PC Gaming | 5.9 | 8.4 | 6.1 | 6.3 |
| Console Gaming | 4.5 | 8.5 | 5.9 | 6.5 |
| Office | 5.6 | 6.5 | 8.8 | 5.2 |
| Editing | 5.4 | 7.7 | 8.9 | 5.7 |
| Screen size | 27.0 in | 26.5 in | 27.0 in | 34.0 in |
| Resolution | 2,560 × 1,440 | 2,560 × 1,440 | 3,840 × 2,160 | 3,440 × 1,440 |
| Panel type | IPS | QD-OLED | IPS | VA |
| Refresh rate | 180 Hz | 240 Hz | 144 Hz | 165 Hz |
| Response time (max refresh) | 6.9 ms | 0.4 ms | 5.8 ms | 9.8 ms |
| Input lag (max refresh) | 3.2 ms | 1.6 ms | 4.1 ms | 3.8 ms |
| Native contrast | 1,050 : 1 | ∞ : 1 | 1,250 : 1 | 3,600 : 1 |
| SDR brightness (real scene) | 330 cd/m² | 265 cd/m² | 410 cd/m² | 420 cd/m² |
| HDR brightness (real scene) | 335 cd/m² | 455 cd/m² | 420 cd/m² | 820 cd/m² |
| DCI-P3 coverage | 80.5% | 98.2% | 97.1% | 92.0% |
| Colour accuracy (dE) | 2.40 | 1.20 | 0.70 | 1.90 |
| Text clarity | 7.8 / 10 | 7.0 / 10 | 9.2 / 10 | 6.8 / 10 |
| Coating | Matte (anti-glare) | Glossy | Matte (anti-glare) | Matte (anti-glare) |
| USB-C charging | Not applicable | 65 W | 90 W | 65 W |
Kestrova K27F-180
Norvik NX27-Q240
The same resolution at very different prices. The NX27-Q240 is far better in dark rooms and in motion; the K27F-180 is the sensible budget pick for bright rooms.
Kestrova K27F-180
Altairon A27U Pro
The A27U Pro is the stronger all-rounder for work, with better colour, sharper text and a full stand. The K27F-180 is faster for competitive play at a lower cost.
Kestrova K27F-180
Kestrova K24F-165
The K27F-180 gives a larger, sharper 1440p screen; the K24F-165 suits smaller desks and lower budgets.
How the monitor is built, how far the stand adjusts and what ships in the box.
| Metric | Result |
|---|---|
| Curved Screen | No |
| Curve Radius | Not applicableFlat panel |
| Finish | Matte black plastic |
A description of the chassis, finish and silhouette. Not scored — style is a matter of taste.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Build Quality Assessment | 6.5 / 10 | 6.5 |
An assessed score for rigidity, panel flex, stand wobble and material quality, recorded on a fixed 0–10 checklist.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Height Adjustment | 0.0 cm | 0.0 |
| Tilt RangeScored on the total span of the range. | -5° to 15° | 6.7 |
| Swivel RangeScored on the total span of the range. | None | 0.0 |
| Portrait Rotation | No | 0.0 |
The stand only tilts. Use a VESA arm if you need height or swivel adjustment.
How far the stock stand moves. Height range carries the most weight because it matters most for posture at a desk.
Stand adjustment measurement (v0.1-demo): Ranges measured with a steel rule and digital inclinometer from the stand's neutral position.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result |
|---|---|
| Base Width | 19.0 cm |
| Base Depth | 17.0 cm |
| Weight (With Stand) | 3.9 kg |
| VESA Mount | 75 × 75 |
Footprint and weight of the stand, which decide how much desk depth the monitor consumes.
Stand adjustment measurement (v0.1-demo): Ranges measured with a steel rule and digital inclinometer from the stand's neutral position.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result |
|---|---|
| Screen Size | 27.0 in |
| Aspect Ratio | 16:9 |
| Coating | Matte (anti-glare) |
Diagonal size, aspect ratio and screen coating.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result |
|---|---|
| Control Type | Five buttons on the rear right |
The physical controls used to reach the on-screen menu.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result |
|---|---|
| Included | DisplayPort cable, External power adapter |
Cables and accessories included with the retail unit.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
Contrast, brightness, uniformity and colour — the measurements that decide how an image actually looks.
| Metric | Result | Metric score |
|---|---|---|
| Native Contrast | 1,050 : 1 | 1.2 |
Ratio between the brightest white and the deepest black the panel can show at the same time. Higher contrast produces deeper blacks in dark rooms.
Contrast measurement (v0.1-demo): Checkerboard pattern measured with a colorimeter in a dark room, local dimming off unless stated.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Local Dimming | No | |
| Dimming Zones | Not applicableNo local dimming | |
| Blooming Control Assessment | 0.0 / 10 | 0.0 |
Whether the backlight can dim zones independently, and how well it avoids blooming. Self-emissive panels control every pixel directly, so this test does not apply to them.
Contrast measurement (v0.1-demo): Checkerboard pattern measured with a colorimeter in a dark room, local dimming off unless stated.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Real Scene Peak | 330 cd/m² | 6.6 |
| Sustained 100% Window | 310 cd/m² | 7.2 |
Luminance with standard (non-HDR) content. Real-scene peak reflects typical desktop use; the sustained full-screen value matters for bright rooms.
Luminance measurement (v0.1-demo): White windows of fixed size measured at the centre of the screen after a warm-up period, brightest calibrated picture mode.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Real Scene Peak | 335 cd/m² | 1.7 |
Peak luminance with a white window covering the given share of the screen.
Peak luminance in HDR mode across window sizes. Small highlights can get much brighter than a full white screen on most panels.
Luminance measurement (v0.1-demo): White windows of fixed size measured at the centre of the screen after a warm-up period, brightest calibrated picture mode.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| 50% Std. Dev. | 4.80% | 4.9 |
| 101.4 | 101.6 | 99.3 | 98.7 | 94.3 |
| 96.9 | 101.4 | 101.7 | 102.0 | 99.7 |
| 100.7 | 100.0 | 100.0 | 96.3 | 93.9 |
| 94.3 | 98.4 | 95.9 | 100.7 | 103.3 |
| 97.4 | 96.0 | 98.4 | 100.0 | 100.1 |
Blue zones are darker than the centre, amber zones brighter. Values in %.
How evenly a 50% gray field is reproduced across the screen. Lower deviation means fewer dirty-screen patches during panning shots.
Uniformity measurement (v0.1-demo): A 5 × 5 grid of luminance readings across a uniform test field; the result is the standard deviation from the mean.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Native Std. Dev. | 4.10% | 5.2 |
How even a near-black image looks in a dark room. Backlight bleed and clouding raise this value.
Uniformity measurement (v0.1-demo): A 5 × 5 grid of luminance readings across a uniform test field; the result is the standard deviation from the mean.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| White Balance dE | 2.90 | 5.6 |
| Color dE | 2.40 | 6.5 |
| Color Temperature | 7,050 K |
Out-of-the-box accuracy in the most accurate preset, before any calibration. Delta E values under 2 are generally not visible to the eye.
Colour measurement (v0.1-demo): Spectro-radiometer readings of a fixed patch set in the most accurate factory preset, compared against the target colour space.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| sRGB xy | 99.1% | 9.4 |
| DCI-P3 xy | 80.5% | 3.6 |
| Adobe RGB xy | 74.0% | 3.6 |
Coverage of standard colour spaces. sRGB matters for web work; DCI-P3 and Adobe RGB matter for video and print.
Colour measurement (v0.1-demo): Spectro-radiometer readings of a fixed patch set in the most accurate factory preset, compared against the target colour space.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| 1,000 cd/m² DCI-P3 ITP | 21.5% | 0.0 |
How much of the DCI-P3 colour volume the panel can reproduce at high luminance, which decides how saturated bright HDR highlights look.
Colour measurement (v0.1-demo): Spectro-radiometer readings of a fixed patch set in the most accurate factory preset, compared against the target colour space.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Color Washout | 35° | 4.2 |
| Brightness Loss | 42° | 4.9 |
The off-axis angle at which colour washes out or brightness drops noticeably. Wide angles keep the edges of large screens consistent.
Viewing angle measurement (v0.1-demo): Readings taken at 5° increments off-axis until the change crosses a fixed visibility threshold.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Subpixel Layout | RGB stripe | |
| Text Clarity Assessment | 7.8 / 10 | 7.8 |
An assessed score for fringing and sharpness of small text, which depends heavily on the subpixel layout.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Total Reflected Light | 6.9% | 3.9 |
| Direct Reflections | 1.20% | 8.4 |
Share of ambient light the screen reflects back at the viewer. Lower is better in bright rooms.
Reflection measurement (v0.1-demo): Screen off, lit by a calibrated diffuse source; reflected luminance is expressed as a share of the incident light.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Banding Assessment | 7.0 / 10 | 7.0 |
| Color Depth | 8-bit |
An assessed score for banding in smooth colour gradients.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result |
|---|---|
| Panel Type | IPS |
| Backlight | Edge-lit LED |
The panel and backlight type. Useful context for the measurements above; not scored on its own.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
How cleanly the panel handles movement: refresh rate, variable refresh and pixel transition speed.
| Metric | Result | Metric score |
|---|---|---|
| Native Refresh Rate | 180 Hz | 5.5 |
| Overclocked Refresh Rate | Not applicableNo overclock mode |
Maximum native refresh rate. Higher refresh rates reduce persistence blur and make input feel more immediate.
Motion feature verification (v0.1-demo): Refresh, VRR and flicker behaviour verified with a photodiode and a signal generator.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| VRR Support | Yes | 10.0 |
| Low Framerate Compensation | Yes | 10.0 |
| VRR Range | 48 Hz to 180 Hz | |
| Formats | FreeSync, G-SYNC Compatible |
Support for matching the refresh rate to the frame rate, which removes tearing without the latency of V-Sync.
Motion feature verification (v0.1-demo): Refresh, VRR and flicker behaviour verified with a photodiode and a signal generator.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Total Response Time | 6.9 ms | 4.4 |
| Overshoot Error | 8.5% | 5.8 |
Average time for pixels to finish transitions at the maximum refresh rate, with the recommended overdrive setting.
Response time measurement (v0.1-demo): Average of a fixed grid of gray-to-gray transitions captured with a photodiode and oscilloscope.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Total Response Time | 11.8 ms | 4.3 |
| Overshoot Error | 1.2% | 9.4 |
The same transition test at 60Hz, which matters for consoles and older content that cannot run at high frame rates.
Response time measurement (v0.1-demo): Average of a fixed grid of gray-to-gray transitions captured with a photodiode and oscilloscope.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Backlight Strobing | No | 0.0 |
| Maximum Strobing Frequency | Not applicableNo strobing mode |
An optional mode that flashes the image to reduce perceived blur, at the cost of brightness.
Motion feature verification (v0.1-demo): Refresh, VRR and flicker behaviour verified with a photodiode and a signal generator.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Flicker-Free | Yes | 10.0 |
| PWM Frequency | Not applicableFlicker-free |
Whether brightness is controlled with pulse-width modulation. A flicker-free backlight is easier on sensitive viewers.
Motion feature verification (v0.1-demo): Refresh, VRR and flicker behaviour verified with a photodiode and a signal generator.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
Latency, resolution, console support and physical connectivity.
| Metric | Result | Metric score |
|---|---|---|
| Native Resolution @ Max Hz | 3.2 ms | 8.4 |
| Native Resolution @ 60Hz | 11.9 ms | 6.6 |
Delay between a signal arriving at the input and the image changing on screen, measured with the fastest picture mode.
Input lag measurement (v0.1-demo): Time from signal output to a change at the centre of the screen, averaged over repeated captures.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| Native Resolution | 2,560 × 1,440 | |
| Pixel Density | 109 ppi | 3.4 |
Native resolution and the resulting pixel density at this screen size.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result | Metric score |
|---|---|---|
| PS5 4k @ 120Hz | No | 0.0 |
| PS5 1440p @ 120Hz | Yes | 10.0 |
| Xbox Series X|S 4k @ 120Hz | No | 0.0 |
| Console HDR | Yes | 10.0 |
Which high-frame-rate and HDR signals current consoles can send to the monitor.
Console signal verification (v0.1-demo): Each console output mode is selected and confirmed through the console's own video information screen.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result |
|---|---|
| HDMI Ports | 2 |
| HDMI Version | 2.0 |
| DisplayPort Ports | 1 |
| DisplayPort Version | 1.4 |
| USB-C DisplayPort Alt Mode | No |
| USB-C Power Delivery | Not applicableNo USB-C input |
Video inputs available on the rear panel.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
| Metric | Result |
|---|---|
| USB-A Ports | 0 |
| KVM Switch | No |
USB ports and hub features.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
Extras that change day-to-day use but are not captured by a measurement.
Notable extras that change day-to-day use.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
How the on-screen menu is navigated and organised.
Structured visual inspection (v0.1-demo): A fixed checklist completed by the reviewer under standard room lighting. Assessed scores use the same 0–10 anchors for every product.
Demo dataRecorded Jun 18, 2026· Source: HannahRev demo dataset — illustrative values, not measurements
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