A comparison of specs, key information, reviews, and best pricing from top retailers
Last updated -- hours ago | Report incorrect information
Company ProductName Specs
Company ProductName Specs
What we think
The PerfectRec monitor team Learn more
Updated April 11, 2024·
If competitive gaming is your top priority and you're willing to invest more, the AOC AG456UCZD with its very high refresh rate and superior response time minimizes ghosting, offering an edge in fast-paced games; its OLED panel also provides deep blacks and infinite contrast but be mindful of the risk of burn-in and a lower text quality. On the other hand, the CoolerMaster GP27U is less expensive and provides excellent image clarity and color accuracy for digital and print photo editing, making it a strong choice for productivity and media consumption; it's also more suitable for HDR video editing and has a higher resolution for crisper details but with a lower refresh rate which might not be as smooth for gaming. 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 AOC AG456UCZD (W-OLED)
- Best in class for casual 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
9.6
8.0
3440 x 1440
RESOLUTION
3840 x 2160
240Hz
REFRESH RATE
160Hz
Inf:1
NATIVE CONTRAST
1072:1
200 nits
SDR PEAK BRIGHTNESS
697 nits
Unknown
HDR PEAK BRIGHTNESS
1550 nits
98.5 %
DCI-P3 COLOR GAMUT
N/A
Matte
COATING
Matte
The AOC AG456UCZD (W-OLED) is best in class for casual gaming, while the CoolerMaster GP27U (IPS MiniLED) is very good.
Productivity
3.8
9.8
3440 x 1440
RESOLUTION
3840 x 2160
83 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 AOC AG456UCZD (W-OLED) is poor.
Media Consumption
5.9
8.0
3440 x 1440
RESOLUTION
3840 x 2160
Inf:1
NATIVE CONTRAST
1072:1
200 nits
SDR PEAK BRIGHTNESS
697 nits
Unknown
HDR PEAK BRIGHTNESS
1550 nits
Matte
COATING
Matte
The CoolerMaster GP27U (IPS MiniLED) is very good for media consumption, while the AOC AG456UCZD (W-OLED) is poor.
Cost
$1,400
$770
$0
$500
$1,000
$1,500
$2,000
$2,500
The AOC AG456UCZD (W-OLED) has a price of $1,400 and the CoolerMaster GP27U (IPS MiniLED) costs $770.
Digital Photo Editing
Yes
No
The AOC AG456UCZD (W-OLED) is suitable for digital photo editing while the CoolerMaster GP27U (IPS MiniLED) is not suitable for digital photo editing.
Key similarities
Competitive Gaming
6.0
5.9
240Hz
REFRESH RATE
160Hz
0.0 ms
TOTAL RESPONSE TIME
6.2 ms
48 - 240 Hz
VARIABLE REFRESH RATE
20 - 160 Hz
No
STROBING / BFI
No
200 nits
SDR PEAK BRIGHTNESS
697 nits
Although they have very similar scores, PerfectRec considers AOC AG456UCZD (W-OLED) to be only fair for competitive gaming, while the CoolerMaster GP27U (IPS MiniLED) is poor.
HDR Gaming and Media Consumption
Yes
Yes
Both the AOC AG456UCZD (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 AOC AG456UCZD (W-OLED) and CoolerMaster GP27U (IPS MiniLED) are not suitable for HDR video editing and color grading.
Print Photo Editing
Yes
Yes
Both the AOC AG456UCZD (W-OLED) and CoolerMaster GP27U (IPS MiniLED) are suitable for print photo editing.
Give feedback
We’re constantly working to improve.
How the AOC AG456UCZD (W-OLED) and the CoolerMaster GP27U (IPS MiniLED) compare to other monitors
Spec Comparison
 |  | |
| AOC AG456UCZD (W-OLED) | CoolerMaster GP27U (IPS MiniLED) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,400 | $770 | ||
Screen Size | |||
Screen Size | 44.5" | 27" | |
Resolution | |||
Resolution | 3440 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 | 200 nits | 697 nits | |
HDR Peak Brightness | |||
HDR Peak Brightness | Unknown | 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 | 0.03 ms | 6.2 ms | |
Variable Refresh Rate | |||
Variable Refresh Rate | 48 - 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 | 10/10 | 8/10 | |
TEXT & IMAGE CLARITY | |||
|---|---|---|---|
Pixels Per Inch | |||
Pixels Per Inch | 83 PPI | 163 PPI | |
Coating | |||
Coating | Matte | Matte | |
Text Clarity Score | |||
Text Clarity Score | 3.8/10 | 8/10 | |
Image Clarity Score | |||
Image Clarity Score | 4.9/10 | 8/10 | |
PORTS & CONNECTIVITY | |||
|---|---|---|---|
HDMI 1.4 Ports | |||
HDMI 1.4 Ports | 0 | 0 | |
HDMI 2.0 Ports | |||
HDMI 2.0 Ports | 0 | 0 | |
HDMI 2.1 Ports | |||
HDMI 2.1 Ports | 3 | 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."
Give feedback
We're constantly perfecting our model
More comparisons for you
Compare AOC AG456UCZD (W-OLED) vs. ViewSonic XG341C-2K (VA Mini LED)
VS
Compare AOC AG456UCZD (W-OLED) vs. Asus PG34WCDM (W-OLED)
VS
Compare AOC AG456UCZD (W-OLED) vs. Samsung Odyssey OLED G8 G85SB (QD-OLED)
VS
Compare CoolerMaster GP27U (IPS MiniLED) vs. LG 34GP83A (IPS)
VS
Compare CoolerMaster GP27U (IPS MiniLED) vs. LG 34GN850B (IPS)
VS
Compare CoolerMaster GP27U (IPS MiniLED) vs. MSI MAG 271QPX (QD-OLED)
VS
FAQs
Why trust us
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.
By the numbers
210
Monitors evaluated
10,500
Monitors stats compiled
15
Proprietary Monitors ratings developed
107,600
Recommendations made
16,140
Consumer hours saved
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.
Featured in
