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What we think
The PerfectRec monitor team Learn more
Updated April 12, 2024·
If you prioritize high-contrast visuals and are keen on HDR content or gaming, the Cooler Master GZ2711 with its OLED panel provides deep blacks and rich colors, making it a strong choice for immersive experiences. However, its high price reflects this quality. On the other hand, the LG 34GN850B offers a wider screen with an IPS panel that has lower contrast but still good quality for everyday use and productivity with a more budget-friendly price. For competitive gaming, Cooler Master's higher refresh rate is advantageous, whereas LG's ultrawide format may appeal to those seeking an expansive view for multitasking or immersive gaming despite its slower response. 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 Cooler Master GZ2711 (W-OLED)
- Best in class for casual gaming
- Best in class for competitive gaming
- Good for media consumption
- Very good refresh rate
- Good image clarity
- Best in class contrast
- Good brightness
- Best in class response time
Advantages of the LG 34GN850B (IPS)
- The LG 34GN850B (IPS) has no clear advantages over the Cooler Master GZ2711 (W-OLED).
Key differences
Casual Gaming
9.7
5.9
2560 x 1440
RESOLUTION
3440 x 1440
240Hz
REFRESH RATE
144Hz
Inf:1
NATIVE CONTRAST
950:1
450 nits
SDR PEAK BRIGHTNESS
359 nits
Unknown
HDR PEAK BRIGHTNESS
436 nits
98.5 %
DCI-P3 COLOR GAMUT
94.5 %
Matte
COATING
Matte
The Cooler Master GZ2711 (W-OLED) is best in class for casual gaming, while the LG 34GN850B (IPS) is poor.
Competitive Gaming
9.6
4.5
240Hz
REFRESH RATE
144Hz
0.3 ms
TOTAL RESPONSE TIME
6.2 ms
48 - 240 Hz
VARIABLE REFRESH RATE
20 - 160 Hz
No
STROBING / BFI
No
450 nits
SDR PEAK BRIGHTNESS
359 nits
The Cooler Master GZ2711 (W-OLED) is best in class for competitive gaming, while the LG 34GN850B (IPS) is poor.
Media Consumption
7.9
5.9
2560 x 1440
RESOLUTION
3440 x 1440
Inf:1
NATIVE CONTRAST
950:1
450 nits
SDR PEAK BRIGHTNESS
359 nits
Unknown
HDR PEAK BRIGHTNESS
436 nits
Matte
COATING
Matte
The Cooler Master GZ2711 (W-OLED) is good for media consumption, while the LG 34GN850B (IPS) is poor.
Cost
$900
$750
$200
$400
$600
$800
$1,000
$1,200
$1,400
The Cooler Master GZ2711 (W-OLED) has a price of $900 and the LG 34GN850B (IPS) costs $750.
HDR Gaming and Media Consumption
Yes
No
The Cooler Master GZ2711 (W-OLED) is suitable for HDR gaming and media consumption while the LG 34GN850B (IPS) is not suitable for HDR gaming and media consumption.
Digital Photo Editing
Yes
No
The Cooler Master GZ2711 (W-OLED) is suitable for digital photo editing while the LG 34GN850B (IPS) is not suitable for digital photo editing.
Print Photo Editing
Yes
No
The Cooler Master GZ2711 (W-OLED) is suitable for print photo editing while the LG 34GN850B (IPS) is not suitable for print photo editing.
Key similarities
Productivity
5.8
5.9
2560 x 1440
RESOLUTION
3440 x 1440
109 PPI
PIXELS PER INCH
108 PPI
Yes
ADJUSTABLE STAND
Yes
Matte
COATING
Matte
The LG 34GN850B (IPS) and Cooler Master GZ2711 (W-OLED) are both poor for productivity.
HDR Video Editing and Color Grading
No
No
Both the Cooler Master GZ2711 (W-OLED) 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 Cooler Master GZ2711 (W-OLED) and the LG 34GN850B (IPS) compare to other monitors
Spec Comparison
 |  | |
| Cooler Master GZ2711 (W-OLED) | LG 34GN850B (IPS) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$900 | $750 | ||
Screen Size | |||
Screen Size | 27" | 34" | |
Resolution | |||
Resolution | 2560 x 1440 | 3440 x 1440 | |
Screen Type | |||
Screen Type | OLED | LED | |
Screen Sub-type | |||
Screen Sub-type | W-OLED | IPS | |
Refresh Rate | |||
Refresh Rate | 240Hz | 144Hz | |
COLOR, CONTRAST & BRIGHTNESS | |||
|---|---|---|---|
Native Contrast | |||
Native Contrast | Inf:1 | 950:1 | |
SDR Peak Brightness | |||
SDR Peak Brightness | 450 nits | 359 nits | |
HDR Peak Brightness | |||
HDR Peak Brightness | Unknown | 436 nits | |
Suitable for HDR Gaming and Media Consumption | |||
Suitable for HDR Gaming and Media Consumption | Yes | No | |
sRGB Color Gamut | |||
sRGB Color Gamut | 100 % | 99 % | |
MOTION CHARACTERISTICS | |||
|---|---|---|---|
Total Response Time | |||
Total Response Time | 0.3 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 | 6.6/10 | |
Ghosting Score | |||
Ghosting Score | 9.9/10 | 8/10 | |
TEXT & IMAGE CLARITY | |||
|---|---|---|---|
Pixels Per Inch | |||
Pixels Per Inch | 109 PPI | 108 PPI | |
Coating | |||
Coating | Matte | Matte | |
Text Clarity Score | |||
Text Clarity Score | 6.6/10 | 7/10 | |
Image Clarity Score | |||
Image Clarity Score | 7/10 | 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
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."
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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
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Monitors evaluated
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Recommendations made
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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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