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What we think
The PerfectRec monitor team Learn more
Updated April 11, 2024·
If you prioritize high-quality HDR gaming and media consumption, the CoolerMaster GP27U with its superior peak brightness and contrast is an excellent choice, though it comes at a premium price. On the other hand, if you're looking for a wider screen for enhanced productivity and multitasking, and can compromise on HDR quality and peak brightness, the more affordable LG 34GN850B offers an ultrawide aspect ratio which may be appealing. However, the LG's performance in fast-paced games may not be as good as the CoolerMaster due to its slower response to fast-moving images. 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 CoolerMaster GP27U (IPS MiniLED)
- Very good for casual gaming
- Best in class for productivity
- Very good for media consumption
- Good refresh rate
- Very good text clarity
- Very good image clarity
- Very good contrast
- Very good brightness
- Very good color volume
Advantages of the LG 34GN850B (IPS)
- The LG 34GN850B (IPS) has no clear advantages over the CoolerMaster GP27U (IPS MiniLED).
Key differences
Casual Gaming
8.0
5.9
3840 x 2160
RESOLUTION
3440 x 1440
160Hz
REFRESH RATE
144Hz
1072:1
NATIVE CONTRAST
950:1
697 nits
SDR PEAK BRIGHTNESS
359 nits
1550 nits
HDR PEAK BRIGHTNESS
436 nits
N/A
DCI-P3 COLOR GAMUT
94.5 %
Matte
COATING
Matte
The CoolerMaster GP27U (IPS MiniLED) is very good for casual gaming, while the LG 34GN850B (IPS) is poor.
Competitive Gaming
5.9
4.5
160Hz
REFRESH RATE
144Hz
6.2 ms
TOTAL RESPONSE TIME
6.2 ms
20 - 160 Hz
VARIABLE REFRESH RATE
20 - 160 Hz
No
STROBING / BFI
No
697 nits
SDR PEAK BRIGHTNESS
359 nits
The CoolerMaster GP27U (IPS MiniLED) and LG 34GN850B (IPS) are both poor for competitive gaming, though the CoolerMaster GP27U (IPS MiniLED) is somewhat better.
Productivity
9.8
5.9
3840 x 2160
RESOLUTION
3440 x 1440
163 PPI
PIXELS PER INCH
108 PPI
Yes
ADJUSTABLE STAND
Yes
Matte
COATING
Matte
The CoolerMaster GP27U (IPS MiniLED) is best in class for productivity, while the LG 34GN850B (IPS) is poor.
Media Consumption
8.0
5.9
3840 x 2160
RESOLUTION
3440 x 1440
1072:1
NATIVE CONTRAST
950:1
697 nits
SDR PEAK BRIGHTNESS
359 nits
1550 nits
HDR PEAK BRIGHTNESS
436 nits
Matte
COATING
Matte
The CoolerMaster GP27U (IPS MiniLED) is very good for media consumption, while the LG 34GN850B (IPS) is poor.
HDR Gaming and Media Consumption
Yes
No
The CoolerMaster GP27U (IPS MiniLED) is suitable for HDR gaming and media consumption while the LG 34GN850B (IPS) is not suitable for HDR gaming and media consumption.
Print Photo Editing
Yes
No
The CoolerMaster GP27U (IPS MiniLED) is suitable for print photo editing while the LG 34GN850B (IPS) is not suitable for print photo editing.
Key similarities
Cost
$770
$750
$200
$400
$600
$800
$1,000
$1,200
The CoolerMaster GP27U (IPS MiniLED) has a price of $770 and the LG 34GN850B (IPS) costs $750.
Digital Photo Editing
No
No
Both the CoolerMaster GP27U (IPS MiniLED) and LG 34GN850B (IPS) are not suitable for digital photo editing.
HDR Video Editing and Color Grading
No
No
Both the CoolerMaster GP27U (IPS MiniLED) and LG 34GN850B (IPS) are not suitable for HDR video editing and color grading.
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We’re constantly working to improve.
How the CoolerMaster GP27U (IPS MiniLED) and the LG 34GN850B (IPS) compare to other monitors
Spec Comparison
 |  | |
| CoolerMaster GP27U (IPS MiniLED) | LG 34GN850B (IPS) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$770 | $750 | ||
Screen Size | |||
Screen Size | 27" | 34" | |
Resolution | |||
Resolution | 3840 x 2160 | 3440 x 1440 | |
Screen Type | |||
Screen Type | MiniLED | LED | |
Screen Sub-type | |||
Screen Sub-type | IPS | IPS | |
Local Dimming Zones | |||
Local Dimming Zones | 576 | N/A | |
COLOR, CONTRAST & BRIGHTNESS | |||
|---|---|---|---|
Native Contrast | |||
Native Contrast | 1072:1 | 950:1 | |
SDR Peak Brightness | |||
SDR Peak Brightness | 697 nits | 359 nits | |
HDR Peak Brightness | |||
HDR Peak Brightness | 1550 nits | 436 nits | |
Suitable for HDR Gaming and Media Consumption | |||
Suitable for HDR Gaming and Media Consumption | Yes | No | |
sRGB Color Gamut | |||
sRGB Color Gamut | 95.1 % | 99 % | |
MOTION CHARACTERISTICS | |||
|---|---|---|---|
Total Response Time | |||
Total Response Time | 6.2 ms | 6.2 ms | |
Variable Refresh Rate | |||
Variable Refresh Rate | 20 - 160 Hz | 20 - 160 Hz | |
Strobing / BFI | |||
Strobing / BFI | No | No | |
Persistence Blur Score | |||
Persistence Blur Score | 7/10 | 6.6/10 | |
Ghosting Score | |||
Ghosting Score | 8/10 | 8/10 | |
TEXT & IMAGE CLARITY | |||
|---|---|---|---|
Pixels Per Inch | |||
Pixels Per Inch | 163 PPI | 108 PPI | |
Coating | |||
Coating | Matte | Matte | |
Text Clarity Score | |||
Text Clarity Score | 8/10 | 7/10 | |
Image Clarity Score | |||
Image Clarity Score | 8/10 | 7/10 | |
PORTS & CONNECTIVITY | |||
|---|---|---|---|
HDMI 1.4 Ports | |||
HDMI 1.4 Ports | 0 | 0 | |
HDMI 2.0 Ports | |||
HDMI 2.0 Ports | 0 | 2 | |
HDMI 2.1 Ports | |||
HDMI 2.1 Ports | 2 | 0 | |
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."
LG 34GN850B (IPS)
See more
Dig into reviews and images
TechSpot
Tim Schiesser | August 2020
"Mid-range 3440 x 1440 144Hz VA monitors are ~$500 to $600 these days. You are getting a much better product for the higher price of the LG, with faster response times and better colors (outside of the contrast ratio), but this is definitely a monitor that is reserved for those that want the best of the best and are willing to pay for it."
Give feedback
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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.
By the numbers
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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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