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What we think
The PerfectRec monitor team Learn more
Updated April 11, 2024·
If competitive gaming is your priority and you're willing to invest more, the Acer X27U with its higher refresh rates and faster response times offers a smoother experience. However, for activities that benefit from higher resolution, like productivity or media consumption, the Sony M9 with its sharper 4K display is superior. The Sony M9 also excels in general use and has better text clarity, making it a strong all-around monitor. The Acer's OLED panel provides outstanding contrast, but OLEDs can have longevity concerns such as burn-in. The Sony's IPS panel has good color accuracy, suitable for creative work, but can't match the deep blacks of the Acer. Give Feedback
this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the Acer X27U (W-OLED)
- Best in class for casual gaming
- Very good for competitive gaming
- Very good refresh rate
- Best in class contrast
- Best in class response time
Advantages of the Sony M9 (IPS FALD)
- Best in class for productivity
- Very good text clarity
- Very good image clarity
- Good brightness
- Good color volume
Key differences
Casual Gaming
9.5
7.3
2560 x 1440
RESOLUTION
3840 x 2160
240Hz
REFRESH RATE
144Hz
Inf:1
NATIVE CONTRAST
1000:1
211 nits
SDR PEAK BRIGHTNESS
432 nits
603 nits
HDR PEAK BRIGHTNESS
695 nits
95.5 %
DCI-P3 COLOR GAMUT
67.7 %
Matte
COATING
Matte
The Acer X27U (W-OLED) is best in class for casual gaming, while the Sony M9 (IPS FALD) is good.
Competitive Gaming
8.8
5.7
240Hz
REFRESH RATE
144Hz
1.4 ms
TOTAL RESPONSE TIME
8.0 ms
20 - 240 Hz
VARIABLE REFRESH RATE
24 - 144 Hz
No
STROBING / BFI
No
211 nits
SDR PEAK BRIGHTNESS
432 nits
The Acer X27U (W-OLED) is very good for competitive gaming, while the Sony M9 (IPS FALD) is poor.
Productivity
5.8
9.6
2560 x 1440
RESOLUTION
3840 x 2160
111 PPI
PIXELS PER INCH
163 PPI
Yes
ADJUSTABLE STAND
Yes
Matte
COATING
Matte
The Sony M9 (IPS FALD) is best in class for productivity, while the Acer X27U (W-OLED) is poor.
Cost
$1,000
$800
$400
$600
$800
$1,000
$1,200
$1,400
$1,600
The Acer X27U (W-OLED) has a price of $1,000 and the Sony M9 (IPS FALD) costs $800.
Key similarities
Media Consumption
7.5
7.5
2560 x 1440
RESOLUTION
3840 x 2160
Inf:1
NATIVE CONTRAST
1000:1
211 nits
SDR PEAK BRIGHTNESS
432 nits
603 nits
HDR PEAK BRIGHTNESS
695 nits
Matte
COATING
Matte
The Acer X27U (W-OLED) and Sony M9 (IPS FALD) are both good for media consumption.
HDR Gaming and Media Consumption
Yes
Yes
Both the Acer X27U (W-OLED) and Sony M9 (IPS FALD) are suitable for HDR gaming and media consumption.
Digital Photo Editing
Yes
Yes
Both the Acer X27U (W-OLED) and Sony M9 (IPS FALD) are suitable for digital photo editing.
HDR Video Editing and Color Grading
No
No
Both the Acer X27U (W-OLED) and Sony M9 (IPS FALD) are not suitable for HDR video editing and color grading.
Print Photo Editing
No
No
Both the Acer X27U (W-OLED) and Sony M9 (IPS FALD) are not suitable for print photo editing.
Give feedback
We’re constantly working to improve.
How the Acer X27U (W-OLED) and the Sony M9 (IPS FALD) compare to other monitors
Spec Comparison
 |  | |
| Acer X27U (W-OLED) | Sony M9 (IPS FALD) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,000 | $800 | ||
Screen Size | |||
Screen Size | 27" | 27" | |
Resolution | |||
Resolution | 2560 x 1440 | 3840 x 2160 | |
Screen Type | |||
Screen Type | OLED | LED | |
Screen Sub-type | |||
Screen Sub-type | W-OLED | IPS FALD | |
Local Dimming Zones | |||
Local Dimming Zones | N/A | 96 | |
COLOR, CONTRAST & BRIGHTNESS | |||
|---|---|---|---|
Native Contrast | |||
Native Contrast | Inf:1 | 1000:1 | |
SDR Peak Brightness | |||
SDR Peak Brightness | 211 nits | 432 nits | |
HDR Peak Brightness | |||
HDR Peak Brightness | 603 nits | 695 nits | |
Suitable for HDR Gaming and Media Consumption | |||
Suitable for HDR Gaming and Media Consumption | Yes | Yes | |
sRGB Color Gamut | |||
sRGB Color Gamut | 100 % | 100 % | |
MOTION CHARACTERISTICS | |||
|---|---|---|---|
Total Response Time | |||
Total Response Time | 1.4 ms | 8 ms | |
Variable Refresh Rate | |||
Variable Refresh Rate | 20 - 240 Hz | 24 - 144 Hz | |
Strobing / BFI | |||
Strobing / BFI | No | No | |
Persistence Blur Score | |||
Persistence Blur Score | 8/10 | 6.6/10 | |
Ghosting Score | |||
Ghosting Score | 9.5/10 | 7.6/10 | |
TEXT & IMAGE CLARITY | |||
|---|---|---|---|
Pixels Per Inch | |||
Pixels Per Inch | 111 PPI | 163 PPI | |
Coating | |||
Coating | Matte | Matte | |
Text Clarity Score | |||
Text Clarity Score | 6.7/10 | 8/10 | |
Image Clarity Score | |||
Image Clarity Score | 7.2/10 | 8/10 | |
PORTS & CONNECTIVITY | |||
|---|---|---|---|
HDMI 1.4 Ports | |||
HDMI 1.4 Ports | 0 | 1 | |
HDMI 2.0 Ports | |||
HDMI 2.0 Ports | 2 | 0 | |
HDMI 2.1 Ports | |||
HDMI 2.1 Ports | 0 | 2 | |
Micro HDMI Ports | |||
Micro HDMI Ports | 0 | 0 | |
DisplayPort 1.2 Ports | |||
DisplayPort 1.2 Ports | 0 | 0 | |
Give feedback
We're constantly perfecting our model
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This information was produced and vetted by the PerfectRec monitors team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest monitor information and makes it digestible for you.
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About the monitor team
Joe Golden, Ph.D
CEO and Monitors Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
Jason Lew
Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.
Chandradeep Chowdhury
Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.
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