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What we think
The PerfectRec monitor team Learn more
Updated April 11, 2024·
If you prioritize high refresh rates and the absolute best contrast for an immersive gaming experience, the Acer X27U with its OLED panel will stand out, especially for darker scenes in games and movies. However, its lower resolution may not be as sharp for productivity tasks compared to the CoolerMaster GP27U, which offers clearer text and images thanks to its higher resolution. The CoolerMaster is also equipped with a more color-accurate panel, making it superior for tasks like photo editing, especially for print where its wider color gamut excels. For competitive gaming, where speed is key, both monitors are suitable, but the Acer might have a slight edge with its faster response time. Keep in mind, the CoolerMaster's MiniLED tech provides excellent brightness for HDR content, which is great for media consumption in well-lit rooms. Consider your main use case when choosing; whether gaming, professional content creation, or general media consumption defines your priority, one of these monitors will be better suited to your needs. 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 CoolerMaster GP27U (IPS MiniLED)
- Best in class for productivity
- Very good for media consumption
- Very good text clarity
- Very good image clarity
- Very good brightness
- Very good color volume
Key differences
Casual Gaming
9.5
8.0
2560 x 1440
RESOLUTION
3840 x 2160
240Hz
REFRESH RATE
160Hz
Inf:1
NATIVE CONTRAST
1072:1
211 nits
SDR PEAK BRIGHTNESS
697 nits
603 nits
HDR PEAK BRIGHTNESS
1550 nits
95.5 %
DCI-P3 COLOR GAMUT
N/A
Matte
COATING
Matte
The Acer X27U (W-OLED) is best in class for casual gaming, while the CoolerMaster GP27U (IPS MiniLED) is very good.
Competitive Gaming
8.8
5.9
240Hz
REFRESH RATE
160Hz
1.4 ms
TOTAL RESPONSE TIME
6.2 ms
20 - 240 Hz
VARIABLE REFRESH RATE
20 - 160 Hz
No
STROBING / BFI
No
211 nits
SDR PEAK BRIGHTNESS
697 nits
The Acer X27U (W-OLED) is very good for competitive gaming, while the CoolerMaster GP27U (IPS MiniLED) is poor.
Productivity
5.8
9.8
2560 x 1440
RESOLUTION
3840 x 2160
111 PPI
PIXELS PER INCH
163 PPI
Yes
ADJUSTABLE STAND
Yes
Matte
COATING
Matte
The CoolerMaster GP27U (IPS MiniLED) is best in class for productivity, while the Acer X27U (W-OLED) is poor.
Cost
$1,000
$770
$400
$600
$800
$1,000
$1,200
$1,400
$1,600
The Acer X27U (W-OLED) has a price of $1,000 and the CoolerMaster GP27U (IPS MiniLED) costs $770.
Digital Photo Editing
Yes
No
The Acer X27U (W-OLED) is suitable for digital photo editing while the CoolerMaster GP27U (IPS MiniLED) is not suitable for digital photo editing.
Print Photo Editing
No
Yes
The Acer X27U (W-OLED) is not suitable for print photo editing while the CoolerMaster GP27U (IPS MiniLED) is suitable for print photo editing.
Key similarities
Media Consumption
7.5
8.0
2560 x 1440
RESOLUTION
3840 x 2160
Inf:1
NATIVE CONTRAST
1072:1
211 nits
SDR PEAK BRIGHTNESS
697 nits
603 nits
HDR PEAK BRIGHTNESS
1550 nits
Matte
COATING
Matte
Although they have very similar scores, PerfectRec considers CoolerMaster GP27U (IPS MiniLED) to be very good for media consumption, while the Acer X27U (W-OLED) is good.
HDR Gaming and Media Consumption
Yes
Yes
Both the Acer X27U (W-OLED) and CoolerMaster GP27U (IPS MiniLED) are suitable for HDR gaming and media consumption.
HDR Video Editing and Color Grading
No
No
Both the Acer X27U (W-OLED) and CoolerMaster GP27U (IPS MiniLED) are not suitable for HDR video editing and color grading.
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How the Acer X27U (W-OLED) and the CoolerMaster GP27U (IPS MiniLED) compare to other monitors
Spec Comparison
 |  | |
| Acer X27U (W-OLED) | CoolerMaster GP27U (IPS MiniLED) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,000 | $770 | ||
Screen Size | |||
Screen Size | 27" | 27" | |
Resolution | |||
Resolution | 2560 x 1440 | 3840 x 2160 | |
Screen Type | |||
Screen Type | OLED | MiniLED | |
Screen Sub-type | |||
Screen Sub-type | W-OLED | IPS | |
Local Dimming Zones | |||
Local Dimming Zones | N/A | 576 | |
COLOR, CONTRAST & BRIGHTNESS | |||
|---|---|---|---|
Native Contrast | |||
Native Contrast | Inf:1 | 1072:1 | |
SDR Peak Brightness | |||
SDR Peak Brightness | 211 nits | 697 nits | |
HDR Peak Brightness | |||
HDR Peak Brightness | 603 nits | 1550 nits | |
Suitable for HDR Gaming and Media Consumption | |||
Suitable for HDR Gaming and Media Consumption | Yes | Yes | |
sRGB Color Gamut | |||
sRGB Color Gamut | 100 % | 95.1 % | |
MOTION CHARACTERISTICS | |||
|---|---|---|---|
Total Response Time | |||
Total Response Time | 1.4 ms | 6.2 ms | |
Variable Refresh Rate | |||
Variable Refresh Rate | 20 - 240 Hz | 20 - 160 Hz | |
Strobing / BFI | |||
Strobing / BFI | No | No | |
Persistence Blur Score | |||
Persistence Blur Score | 8/10 | 7/10 | |
Ghosting Score | |||
Ghosting Score | 9.5/10 | 8/10 | |
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 | 0 | |
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 | |
Shopping
CoolerMaster GP27U (IPS MiniLED)
See more
Dig into reviews and images
Tom's Hardware
Christian Eberle | February 2023
"The Cooler Master Tempest GP27U leaves little to complain about. It delivers a stunning picture with high contrast, brightness, and vivid color. Professional-grade video processing means a superlative gaming experience. And it’s a little less expensive than the competition."
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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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