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  1. Monitors

AOC CU34G2X/BK

9,0/10 (115 reviews)
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AOC monitors
AOC CU34G2X/BK

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Refresh rate
  • 144 Hz
  • 144 Hz
  • 180 Hz
  • 160 Hz
  • 144 Hz
Sharpness
  • Quad HD (1440p)
  • 4K (UHD)
  • Quad HD (1440p)
  • 4K (UHD)
  • 4K (UHD)
Panel type
  • VA panel
  • IPS panel
  • IPS panel
  • IPS panel
  • IPS panel
Recommended display resolution
  • 3440x1440
  • 3840x2160
  • 2560x1440
  • 3840x2160
  • 3840x2160
View full comparison

Product information

Key specs

Screen size
34 inches
Sharpness
Quad HD (1440p)
Refresh rate
144 Hz
Pixel density
109,7 ppi
Color quality
Standard
View all specifications

Pros and cons

According to our monitor expert
  • Thanks to the 1 ms response time and 144Hz refresh rate, you'll experience extremely smooth images.
  • With an ultrawide monitor, you can see more of the playing field if the game supports this.
  • The 3440x1440 resolution ensures sharp images during gameplay.
  • This monitor doesn't have integrated speakers to play the sound of your games.
  • The AOC CU34G2X/BK doesn't have an IPS panel, so colors are more blurry with a large viewing angle.
Product Expert monitors

Description

Immerse yourself completely in your favorite games with the AOC CU34G2X/BK UltraWide gaming monitor. The CU34G2/BK refreshes 144 times per second, so you can game with a very smooth image. Thanks to the 21:9 aspect ratio and the 34-inch screen, you can see more of the playing field. You don't have to compromise on the pixels, because this large screen has a resolution of 3440x1440. The 1ms response time ensures that you don't experience any ghosting. The curved screen fold around your field of vision, so you feel like you're in the middle of your game. Set up FreeSync to adjust the refresh rate to the number of fps that your video card produces. You can tilt, rotate, and adjust the monitor in height for a comfortable sitting position while you game.

Note: for QHD gaming, you need a powerful video card like a NVIDIA GeForce RTX GPU or AMD Radeon RX 5000-series GPU, an Xbox One, Xbox Series X or S, or a PlayStation 5.

    Advice from our expert
  • Internet, email & text processing: suitable
  • As a second screen: suitable
  • Business use: suitable
  • Photo editing: suitable
  • Video editing: possible, but better with the DCI-P3 color profile
  • Gaming: suitable

    Which games can you play smoothly?
  • Sandbox games (GTA V): suitable
  • Open world (Assassin's Creed: Valhalla): suitable
  • Light shooters (Fortnite): suitable
  • Demanding shooters (Call of Duty): suitable
  • Racing games (F1 2021): suitable, but even better with 165 or 240Hz

Immerse yourself completely in your favorite games with the AOC CU34G2X/BK UltraWide gaming monitor. The CU34G2/BK refreshes 144 times per second, so you can game with a very smooth image. Thanks to the 21:9 aspect ratio and the 34-inch screen, you can see more of the playing field. You don't have to compromise on the pixels, because this large screen has a resolution of 3440x1440. The 1ms response time ensures that you don't experience any ghosting. The curved screen fold around your field of vision, so you feel like you're in the middle of your game. Set up FreeSync to adjust the refresh rate to the number of fps that your video card produces. You can tilt, rotate, and adjust the monitor in height for a comfortable sitting position while you game.

Note: for QHD gaming, you need a powerful video card like a NVIDIA GeForce RTX GPU or AMD Radeon RX 5000-series GPU, an Xbox One, Xbox Series X or S, or a PlayStation 5.

    Advice from our expert
  • Internet, email & text processing: suitable
  • As a second screen: suitable
  • Business use: suitable
  • Photo editing: suitable
  • Video editing: possible, but better with the DCI-P3 color profile
  • Gaming: suitable

    Which games can you play smoothly?
  • Sandbox games (GTA V): suitable
  • Open world (Assassin's Creed: Valhalla): suitable
  • Light shooters (Fortnite): suitable
  • Demanding shooters (Call of Duty): suitable
  • Racing games (F1 2021): suitable, but even better with 165 or 240Hz

Tips for using this product

Tips for using this product

Read our tips and find out all about how to set up your product and use it the right way.

View all support

Download the manual

Download the manual (3.78 MB)

Included by default

  • Manual (3.78 MB)
  • Power cable
  • HDMI cable
  • DisplayPort cable
  • Monitor stand

Included by default

  • Power cable
  • HDMI cable
  • DisplayPort cable
  • Monitor stand

Download the manual

Download the manual (3.78 MB)

Key specs

Screen size
34 inches
Sharpness
Quad HD (1440p)
Refresh rate
144 Hz
Pixel density
109,7 ppi
Color quality
Standard
View all specifications

Visit one of our stores, also by appointment

  • Get advice from an expert
  • We have stores in Almere, Amsterdam West, Amsterdam Zuidas, Arnhem, Breda, Den Bosch, The Hague, Eindhoven, Groningen, Haarlem, Hengelo, Leeuwarden, Leiden, Nijmegen, Rotterdam Alexandrium, Rotterdam Centrum, Tilburg, and Utrecht

Reviews

115 reviews
9,0/10 (115 reviews)

Rating

72 reviews with 5 stars

39 reviews with 4 stars

3 reviews with 3 stars

1 reviews with 2 stars

0 reviews with 1 star

Customer images

Most helpful reviews

10/10

Great screen for a great price

  • Very good black values (sometimes almost looks like Oled)
  • Beautiful and accurate colors, test report: Delta E 0.73 (better than my IPS)
  • Overdrive can be used maximum on 'medium' (so 1ms is not achieved)
  • Kevin oudhuis
  • 14 July 2020
  • Automatically translated from Dutch
7,2/10

Prize fighter with qualities!

  • Price quality
  • nice curve
  • Out-of-the-box settings required
  • Daan mulder
  • 8 December 2021
  • Automatically translated from Dutch
9,2/10

Great screen, competitive price

  • High resolution and refresh rate
  • Beautiful, understated design
  • Control buttons could be better
  • Jeroen haesendonckx
  • 24 April 2020
  • Automatically translated from Dutch
9,2/10

Great screen for a good price

  • Value for money
  • Super quiet and fast image
  • H.j.b
  • 6 July 2020
  • Automatically translated from Dutch
8,8/10

Great ultra-wide monitor for this price!

  • Value for money
  • Ultra wide (uses QHD for this)
  • OSD menu is very difficult to operate
  • Snoopbok
  • 24 March 2020
  • Automatically translated from Dutch
9,6/10

Good monitor for a relatively low price

  • 144hz screen
  • Freesync
  • USB ports on the back hard to reach
  • Martin
  • 28 January 2021
  • Automatically translated from Dutch
9,2/10

Nice curved screen, good size

  • nice picture
  • viewing angle is ok
  • no auto off, just sby
  • Sam
  • 18 August 2022
  • Automatically translated from Dutch
8,4/10

Good screen, bad foot.

  • Good image quality/Deep black levels
  • gigantic work surface
  • slight darkening on edges
  • Bert demeulemeester
  • 4 May 2020
  • Automatically translated from Dutch
8,8/10

Top screen

  • Cheapest 1440p 144hz display on the market
  • Nice VA panel
  • No built-in speakers
  • Biggie
  • 7 February 2020
  • Automatically translated from Dutch
10/10

Wonderfully quiet screen

  • Frank
  • 16 March 2024
  • Automatically translated from Dutch
10/10

Great screen for a great price

  • Very good black values (sometimes almost looks like Oled)
  • Beautiful and accurate colors, test report: Delta E 0.73 (better than my IPS)
  • g-sync compatible works fine in combination with 1080 gtx
  • Overdrive can be used maximum on 'medium' (so 1ms is not achieved)

Very good price for a monitor with these specs (1440p, 144hz, ultrawide, 1ms). Screen has a nice design, subtle red decoration. Can be used as a game monitor, but wouldn't look out of place in my (home) office. Delivered well packaged including cables and test report. This gave my unit an sRGB DELTA E of 0.73 (>2 is good, so this is almost perfect). Luminance uniformity as well (only one of the 25 measuring points (top right) at 101%. Others all 100%. Checked out some test screens myself. Colors nice and uniform, very slight deviation at the edges, but you can't escape that with this format of VA panels due to viewing angle. Black, gray and white screens show no deviations / color difference. I switched from an IPS panel so was a bit hesitant about colors of VA panel. But this VA panel is much more accurate and nicer than my IPS monitor. In addition, much deeper black values what really stands out. Has a nice curve. Only drawback is that the 'overdrive' can only be used effectively to medium. You will not get the 1ms. However, this monitor also delivers great game performance on medium. Play a lot of Apex. I run this at ~80 to ~100 fps in combination with 1080 gtx with g-sync (compatible). Plays wonderfully smooth. Ultrawide in combination with 34' is just great. I set my 'User RGB' to R35, G36, B50 for such a neutral possible look (no green, b lukewarm or warm haze). Then 'GameColor' on 11 (+1) for just that little bit of extra pop of the colors. Very satisfied.

  • Kevin oudhuis
  • 14 July 2020
  • Automatically translated from Dutch
7,2/10

Prize fighter with qualities!

  • Price quality
  • nice curve
  • Stable premium feel as standard
  • Out-of-the-box settings required

There are many things that this screen does well for the price. You do notice in small things that the screen is really a price fighter. This is of course not a problem if you are aware of it in advance.

Out of the box this screen is somewhat mediocre, in the OSD of the screen settings have to be adjusted in order to get the most out of the screen. For example, the colors are a bit "flat" and freesync is not turned on by default (And I understand why they leave it off by default).

The screen buttons are located at the bottom of the panel on the right. This makes adjusting the settings in the OSD a challenge. Especially if, like me, you turn off your screen a few times instead of clicking confirm (These buttons are right next to each other). Ultimately, when you have set the screen to your liking, you no longer have to sit here if all is well, so this is a one-time disturbing factor.
I am someone who lowers the brightness of his monitor at night and increases the warm colors of the screen so as not to jump into bed. For this I use the programs Twinkle Tray and F.lux. This means you no longer have to deal with the clumsy buttons if you want to adjust the brightness of your screen.

The curve of the monitor is very fine, and you get used to it after a few minutes. I've always had 27 inch 16:9 monitors without a curve before. No more monitors for me without a curve that exceeds 34 inches. This certainly works out well because the viewing angles of a VA panel like this aren't great. You notice this, for example, when you slump while watching a movie, luckily the screen is easy to adjust on the supplied premium foot.

Starting with the quality of the panel itself, I would like to return to the Freesync option. This monitor has the freesync option turned off by default to prevent many people who buy this screen from returning it.
This one has significant flicker issues during game loading screens, or poorly optimized games such as my favorite Mmorpg; Guild Wars 2. There are several guides on the internet how you can adjust the refresh range of the sync with the CRU program so that it will flicker less/no flicker. I turned off the Freesync feature because I don't notice much screen tearing in most games, and I'm more sensitive to a screen that lights up a few times a second like a Christmas tree.

Let's talk about that Christmas tree. There is a red/copper color trim at the bottom of the screen. Tastes differ but I think this looks kitsch. But I understand that the company has chosen this to provide the real gamers with a "Flashy" looking display.

The final rating for me is an 8.5/10 for a screen of this price. It is a price fighter that broadly does many things well on this screen. For example, I did not expect that decent HDMI and Displayport cables would be included. And a good thing too! because my old DisplayPort cable couldn't handle the 144Hz refresh rate, so it switched back to 120. Besides all the things this screen does well, you can see that they have cut off in other areas. The entire screen is made of plastic and there are no speakers in this screen, but these are recognized by Windows, so you have to disable them manually in Windows.
I think these are smart decisions to save money, because you don't feel anything of that plastic if you don't stroke your screen every day and monitor speakers generally sound even worse than a cookie tin with a rotten banana in it.

I would recommend this screen to people who are not afraid to change settings on their hardware. If you have more money and want to spend and want a nice out of the box experience, this may not be the screen for you. If, like me, you're looking for the best hardware for the least money, look no further!

  • Daan mulder
  • 8 December 2021
  • Automatically translated from Dutch
9,2/10

Great screen, competitive price

  • High resolution and refresh rate
  • Beautiful, understated design
  • Good contrast
  • Control buttons could be better

The first reasonably priced 34” monitor with a high refresh rate and a resolution of 3440 x 1440, this makes for an immersive gaming experience, although I will be ordering another graphics card to be able to play at this resolution in newer titles as well. The screen is also suitable for surfing the internet, keep in mind the 21:9 aspect ratio, you can display a lot more in width, but less in height, needs to be adjusted in the beginning, I'm used to it by now . Compromises have been made to keep the price reasonable, but I am impressed with the result and happy with my purchase.

  • Jeroen haesendonckx
  • 24 April 2020
  • Automatically translated from Dutch
View all 115 reviews

Insure your monitor

You can select one of the Backup Plans below in your shopping cart. It will protect your brand new monitor against damage and/or theft.

AOC CU34G2X/BK
  • 3-year Backup Plan
    35,99 one-time payment
  • 5-year Backup Plan
    59,00 one-time payment

Specifications

Product

Product number
855617
Manufacturer code
CU34G2X/BK
Brand
AOC
Warranty
3 years
Processing of your defect
Via Coolblue
Old product returned for free
Yes

Screen

Screen size
34 inches
Recommended display resolution
3440x1440
Sharpness
Quad HD (1440p)
Panel type
VA panel
Aspect ratio
Ultrawide (21:9)
Local dimming
No
Response time
1 ms
Refresh rate
144 Hz
Pixel density
109,7 ppi
Brightness
300 cd/m2
HDR support
No
Contrast ratio
3000
Touchscreen
No
Screen reflection
Anti-glare
Blue light filter
Yes
Flicker-free technology
Yes
Color space
sRGB
Color depth
17 million colors (8-bit)
G-sync
No
G-sync Ultimate
No
Adaptive Sync
Yes
Type of adaptive sync
FreeSync
Resolution width
3440 pixels
Resolution height
1440 pixels
Anti-reflection type
Anti glare
Viewing distance
57 - 152 cm
Horizontal viewing angle
178 °

Physical properties

Height
52,82 cm
Width
80,83 cm
Depth
23,74 cm
Weight
8,1 kg
Color
Black
Including stand
Yes
Material
Plastic
Cable management
Yes
Bezel width (screen edge)
4 mm
Appearance
Gaming
Curved
Yes
Screen curve
1500 R

Connectors and connections

Number of HDMI connectors
2
Number of Female HDMI type A 2.0 ports
2
Number of headphone jacks
1
Type of headphone connection
3.5mm (TRS)
Number of Female Standard DisplayPort 1.4 ports
2
Number of female standard USB-A ports
4
Female standard USB-A port version
3.0
Number of female 3.5mm TRS Audio Jack ports
1
Type of USB port
Standard USB-A
Number of USB ports
4

Included by default

Included by default
DisplayPort cable, HDMI cable
Not included by default
USB-C cable

Adjustability

Adjustable in height
Yes
Tiltable
Yes
Pivotable stand
Yes
Pivot function
No
VESA mount option
Yes
VESA mount
100x100mm

Energy consumption

Energy label
G
Energy consumption standby
0,5 W
Energy consumption active
67 W
Energy consumption per 1000h
39 kWh
Annual energy consumption
56,94 kWh
Annual energy costs
22,78 euros

Other properties

Built-in speakers
No
Webcam
No
Split screen
No
Kensington lock
Yes

Quality properties

Recommended for use
Gaming, Internet, email, and text processing, Watching movies in Full HD

Related products

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AOC CU34G2X/BK
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