172

Tempest GP27U Review

True Score

73
73
5

Experts

78
61

Consumers

Product Awards

GR Certified

Expert Rankings

The Cooler Master Tempest GP27U’s excellent picture quality, fast gaming performance, and sleek design make it a great choice for hardcore gamers. However, off-center viewing problems and calibration requirements may disappoint.

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Table of Contents

Product Snapshot

Overview

The Cooler Master Tempest GP27U is a premium gaming monitor released in late 2022. As a high-end option, this monitor boasts features that productivity enthusiasts and hardcore gamers should expect from the best computer monitors. The 27-inch MiniLED panel offers a 4K resolution with a 160 Hz refresh rate. It’s compatible with AMD FreeSync and NVIDIA G-SYNC VRR technologies.

This Cooler Master monitor provides DisplayPort and HDMI 2.1 connectivity options for compatibility with PCs and gaming consoles. Unlike many top-rated gaming monitors, the device also features a USB-C port and a built-in KVM switch, so you can work from two different machines at the press of a button. For another high-end gaming monitor, check out our HP Omen 27qs review or our Samsung Odyssey G85SB review.

Best For

  • 4K

  • Coding

  • For Mac

  • Gaming

  • Mac Mini

  • Macbook Pro

  • Photo Editing

  • Vertical

Consensus

our Verdict

The Cooler Master Tempest GP27U is an excellent all-around computer monitor that appeals mostly to gamers due to its impressive picture quality and advanced gaming features. With a 4K resolution, wide color gamut, and high brightness levels, you’ll be immersed in any game you play here. Plus, it offers a 165Hz refresh rate, variable refresh rate features, and a tested 1ms response time for better performance.

The Tempest GP27U isn’t without its flaws, though. You’ll need to do some calibration to get accurate color representation, and wide-angle viewing can wash out the colors and cause some blooming. The Tempest is an excellent gaming monitor with many advanced gaming features, but if you’re on a budget or looking for a productivity monitor, you may want to consider other options.

ReasonS to Buy

  • Excellent Picture Quality
    • With a 4K resolution and wide color gamut in the top 10% of others tested in this category, this gaming monitor excels in creating a beautiful and immersive image quality. Plus, in spite of its relatively low native contrast ratio (1,072:1), the monitor is capable of producing deep blacks thanks to its full-array MiniLED panel.

  • Fast Response Time
    • The Tempest GP27U is quick thanks to its tested 1ms response time, which is in the top tier of this category and on par with the highest-performing options available today.

  • Low Input Lag
    • With a tested input lag of around 3.9ms, this monitor ranks at the top of our list when compared to other tested gaming monitors. As such, the actions you take on your keyboard or mouse happen almost instantaneously on the monitor. This is excellent for FPS games and productivity applications, requiring accurate and timely inputs.

  • Flexible Refresh Rates
    • The monitor offers an impressive 165Hz refresh rate, which makes motion handling a breeze. Fast-moving objects on the display look great, and you won’t experience many screen tears during crucial moments in your game.

Reason to Avoid

  • Needs Calibration
    • You’ll likely need to do deeper color calibration to get the best out of the monitor’s superior image quality. It can be an intimidating task if you haven’t done this before.

  • Poor Viewing Angles
    • If you’re looking at the monitor at an off-center angle, you may notice some blooming and color washout. This doesn’t make for a great couch co-op experience with friends.

  • KVM Switch Needs Work
    • The included KVM switch is great for switching between machines, but its functionality can be finicky and unreliable. If you run two machines on the same monitor, you may still want to use an external switch.

Tempest GP27U Specs

Aspect RatioAspect Ratio16:9
Available InputsAvailable Inputs3.5mm, DisplayPort, HDMI, USB
Bluelight FilterBluelight FilterYes
Built-In WebcamBuilt-In WebcamNo
Curved ScreenCurved ScreenNo
Display TypeIPS
Flicker FreeFlicker FreeYes
HDMI Inputs2
HDR FormatHDR10
High Dynamic Range (HDR)Yes
Max Resolution3840 x 2160 (4k)
Panel TypePanel TypeFlat Series
Refresh Rate160 Hz
Response TimeResponse Time1 ms
Rotating ScreenRotating ScreenYes
Screen size27"
Sync TechnologySync TechnologyAMD FreeSync

All Specs

Test Results

Brightness (nits)570.2225
Contrast Ratio (as ratio, x:1)1,043.075
Color Gamut/Accuracy % (DCI P3 xy)101.775
Color Gamut/Accuracy % (DCI P3 uv)0
Color Gamut % (Adobe RGB Coverage xy)99.5333
Color Gamut % (sRGB Coverage xy)99.8
Color Gamut % (Rec. 2020 Coverage xy)83.75
Color Gamut % (Rec. 709 Coverage xy)0
Input Lag (ms)16.9
Response Time (ms)4.6075
Reflections % (Total Reflections)5.5
Horizontal Viewing Angle (Washout Left)27
Horizontal Viewing Angle (Washout Right)32
Vertical Viewing Angle (Washout Above)35
Vertical Viewing Angle (Washout Below)31

All Tests

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Product Comparison

Tempest GP27U Review

True Score

73
79
81
NR

Ranking

#

172

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196

#

125

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196

#

83

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196

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/

Market Context

The Cooler Master Tempest GP27U is a premium gaming monitor released in late 2022. As a high-end option, this monitor boasts features that productivity enthusiasts…

The Cooler Master Tempest GP27U is a premium gaming monitor released in late 2022. As a high-end option, this monitor boasts features that productivity enthusiasts and hardcore gamers should expect from the best computer monitors. The 27-inch MiniLED panel offers a 4K resolution with a 160 Hz refresh rate. It’s compatible with AMD FreeSync and NVIDIA G-SYNC VRR technologies.

This Cooler Master monitor provides DisplayPort and HDMI 2.1 connectivity options for compatibility with PCs and gaming consoles. Unlike many top-rated gaming monitors, the device also features a USB-C port and a built-in KVM switch, so you can work from two different machines at the press of a button. For another high-end gaming monitor, check out our HP Omen 27qs review or our Samsung Odyssey G85SB review.

If you read our Samsung T55 review  you’ll see that the Tempest wins in resolution with 4K vs. 1080p, but the T55’s curved display and…

If you read our Samsung T55 review  you’ll see that the Tempest wins in resolution with 4K vs. 1080p, but the T55’s curved display and VRR functionality can be more appealing. For another curved gaming monitor, consider reading our Dell Alienware AW3423DW review .

The Innocn 27M2V offers MiniLED backlighting and 4K resolution, but it tends to perform better with variable refresh rate (VRR) functionality, while the Tempest offers…

The Innocn 27M2V offers MiniLED backlighting and 4K resolution, but it tends to perform better with variable refresh rate (VRR) functionality, while the Tempest offers better motion handling. The Innocn also boasts better local dimming. Read our Innocn 27M2V review to learn more.

The Cooler Master brand as a whole offers a wide range of top-rated gaming monitors, each offering different features and price tags. For example, the…

The Cooler Master brand as a whole offers a wide range of top-rated gaming monitors, each offering different features and price tags. For example, the Cooler Master GM series typically offers a 1080p Full HD resolution as compared to the Tempest’s 4K. The Cooler Master GA Series offers 100Hz refresh rates as compared to the Tempest’s 165Hz.

Aspect Ratio

16:9

Available Inputs

3.5mm, DisplayPort, HDMI, USB

3.5mm, DisplayPort, HDMI, USB

Bluelight Filter

Yes

Yes

Built-In Webcam

No

No

Curved Screen

No

No

Display Type

IPS

LED

LED

Flicker Free

Yes

Yes

HDMI Inputs

2

1

2

Dig Deeper

Samsung T55 Review →

INNOCN 27M2V Review →

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    $871.67
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    Availability

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Score Card

E

Expert Score

73

*.75

We place a 75% weighted value on Expert Test Scores

C

Customer Score

78

*.25

We place a 25% weighted value on Customer Scores

True Score

73

Any product with a True Score above 80 is a Absolutely Fresh

Expert Scores

  • Rtings
    103.4

    Category Trust Rating

    84
    The Cooler Master GP27U is an impressive overall monitor. It’s excellent for the office thanks… Read More

    By:

    Jake Thauvette
  • Kit Guru
    77.17

    Category Trust Rating

    80
    The Cooler Master GP27U is very nearly the complete package. The visible flickering when both… Read More

    By:

    Dominic Moass
  • Tom’s Hardware
    92.08

    Category Trust Rating

    90
    The Cooler Master Tempest GP27U leaves little to complain about. It delivers a stunning picture… Read More

    By:

    Christian Eberle
  • Techspot
    85.96

    Category Trust Rating

    75
    We were impressed with how wide the color gamut is, providing great coverage of sRGB,… Read More

    By:

    Tim Schiesser
  • IGN
    20.35

    Category Trust Rating

    80
    The Cooler Master Tempest GP27U is an exceptional monitor in most regards. It’s brilliantly colorful… Read More

    By:

    Mark Knapp