Modern technologies allow users to immerse themselves in the depth of what is happening on the screen and be impressed with the depth of the picture even more than ever before. Liquid crystal solutions were joined by current OLEDs, with the help of which manufacturers were able to afford a little more scope for imagination. Thus, strongly curved OLED solutions appeared, including the Acer X34Xbmiiphuzx 34″ QHD ultrawide monitor from the top gaming Predator line. The monitor is based on a rare W-OLED LG Display panel with unique characteristics. But will the Predator withstand the onslaught of the latest QD-OLEDs with similar technical characteristics? Let’s find out in this Acer Predator X34X review below.
Acer Predator X34X Review
Unboxing
The this Acer Predator X34X review model comes in a large, heavy box of unpainted cardboard. The box features two schematic images of the display and a complete list of features in small pictograms with captions. There is no plastic carrying handle.
The unpacking scheme is standard. The monitor is fully protected from external influences and is supplied disassembled (case + stand + central stand).
The package includes:
- Power cable
- HDMI cable
- USB Type-C to Type-C cable
- USB Type-B to Type-A cable (for PC connection)
- Quick start guide
- Warranty service brochure
- Leaflet with company office addresses in the EMEA region
- Metal adapter stands for VESA mounting
- Stickers with energy consumption details
- Factory calibration report (sRGB mode)
Design and Ergonomics
Due to the use of a curved panel, the manufacturer has abandoned the ultra-thin case for safety reasons – the solution is thinner than some curved LCDs, but by OLED standards, it is pretty large, and the case is frankly thick. All control electronics, connection interfaces, and fastening elements of the stand or VESA-compatible bracket are hidden behind the plastic box at the back. To use the latter, you will need to use a set of metal stands from the set in the box from the monitor.
The Y-shaped stand, raised above the surface, is made of metal and painted dark gray. The central stand is simpler—made from black matte plastic but with a metal filling. At its bottom is a small plastic element of the cable routing system. Its efficiency is relatively low.
Due to the large diagonal of the screen, the stand is large and takes up a significant amount of space on the desktop. However, the small depth of the double leg at the back allows you to move the monitor further away from the user if the depth of the desk allows this.
Separately, we will highlight the standard screw mount at the top of the central column. It is used to install a webcam or high-end cameras.
The central column is attached to the body in a few seconds, and to remove it, you need to move the plastic locking button up. After that, the user will see a regular VESA-compatible platform of the 100 x 100 mm standard with the ability to attach third-party brackets.
The screen tilt angle can be adjusted from -5 to +20°, the height can be adjusted to 120 mm, and rotation can be made by 15° in both directions.
Full-screen rotation into portrait mode (Pivot) is not available, but there is free movement of ~4° to the right and left, perhaps to make it easier to connect the wires.
All retaining elements, the insides of the fastening mechanisms, and the base of the stand are made of metal. The latter uses four tiny rubber feet to grip the work surface better.
There is no backlash, and the monitor hardly wobbles. The cooling system is passive, so you don’t have to worry about the noise from the Predator X34X—there is none.
The body elements are well-painted, and some are made of brushed metal, but these parts are prone to scratches and visible fingerprints. However, if you have no complaints about the monitor’s appearance and the combination of materials, you don’t have to worry about the quality.
All main connection interfaces are located at the back of the monitor and are oriented downwards.
The additional ports are located on the bottom edge of the case, on the right side. It offers USB Type-A, USB Type-C, and 3.5 mm audio.
The monitor’s built-in audio system is represented by two speakers of 5 W each, located behind the ventilation slots in the upper part of the case. The sound quality is objectively average.
Menu and Control
The monitor is controlled using a single 5-position joystick located on the lower edge of the case, strictly in the center. It also functions as a power button (short press) and a power button (hold for 2-3 seconds).
There is a dual-mode power indicator nearby, which glows orange or blue. You can’t turn it off or adjust the brightness, but when working in front of the monitor, it is virtually invisible and doesn’t interfere.
Suppose you press the joystick or move it to any position. In that case, a rectangular block appears on the screen with the following options: activating preset image modes, adjusting brightness, selecting a signal source, and going to the main menu. Quick access functions can be reassigned through a special subsection in the menu.
Being a first-generation W-OLED monitor, the Acer Predator X34X will display a center-screen non-transparent red box burn-in notification every four hours. In an idealized version, you should always agree to encounter fewer vertical and horizontal stripes on dark fills (artifacts are especially noticeable on dark gray canvases). You cannot turn off such a notification, which can interfere with intense gaming battles, but this is the reality of this Acer X34X OLED monitor. Moreover, no one forces you always to agree and waste 2-4 minutes.
The main OSD screen has several sections, each offering different settings and functionalities.
Gaming Assistant
The first section introduces a relatively new gaming assistant with three key functions:
- Activating a timer
- Selecting an on-screen aim point
- Enabling “sniper mode,” which applies a digital zoom to part of the screen
Gaming
Next is the gaming section, where you can:
- Activate VRR support via AMD FreeSync Premium Pro
- Manage reduced input lag mode (enabled by default)
- Enable an FPS counter, which displays the current vertical refresh rate (applicable only when VRR is active)
Picture
The picture section provides various display adjustments:
- Brightness and contrast controls
- Constant brightness mode, which minimizes the impact of the ABL algorithm based on the screen’s APL fill level
- Black Boost, a smooth black enhancement to improve shadow visibility
- Low Blue Light mode, which also affects preset brightness levels
- HDR mode activation (auto mode is required for real HDR)
- Super Sharpness technology (best left disabled, especially in sRGB mode, where it should be turned off)
Color
The color section offers:
- Gamma and color temperature adjustments
- Emulation of various color spaces (sRGB and Rec.709, which are practically identical)
- A black-and-white (grayscale) mode
- Preset game modes
- Six-axis hue and saturation correction (not recommended, as it may negatively impact image quality)
Audio
This section allows volume control for the built-in speaker system.
OSD Settings
Here, you can customize the menu appearance, choose a localization language, and select from six predefined menu positions on the screen. Unlike previous versions, positioning along two independent axes is no longer available, making adjustments quicker and more convenient.
Connectivity and Advanced Features
The final section includes options for:
- Adjusting dynamic range settings when using an HDMI connection
- Selecting the signal source
- Reassigning functions for two joystick positions
- Enabling DSC support
- Configuring the built-in image scaler
- Choosing a source for the KVM function
- Enabling USB charging while the screen is off
- Activating forced “screen-clearing” mode
System Information and Presets
A dedicated section displays system information about the monitor and includes a function for saving changes to the monitor’s memory, specifically to one of the three custom game presets.
Acer Predator X34X review test
Color Gamut
The monitor uses a new 34-inch W-OLED panel from LG Display with an extended color gamut, which, according to the manufacturer, is close to the full DCI-P3. Let’s check its capabilities on a random Acer Predator X34X review sample:
The screenshots show that two of the three reference points are noticeably shifted in space relative to the standard sRGB color standard, surpassing it in many areas. Compared to the even wider DCI-P3, the monitor slightly loses to it only in green halftones, which is the norm for a monitor on a modern W-OLED panel from LG Display.
It should be noted that without a profile and software with support for the color management system, all familiar pictures, photos, and videos will have increased color saturation. Some people will like this, while others will be disappointed.
After setting up and calibrating, with the receipt of an individual device profile, this problem is solved, but not always wholly (some applications, especially games, do not use a full-fledged color management system). At the same time, the color gamut is slightly reduced and has a 95.5% coverage of the DCI-P3 space—a very decent result. We did not expect to see 99% declared by the manufacturer.
After switching to the Low Blue Light mode via the subsection with color temperature settings, the Predator X34X’s color gamut decreases slightly to 137.7% of the sRGB color volume and 92.7% of DCI-P3 compliance. Considering that the preset is not intended for working with color, there can be no questions.
But there are questions about the sRGB emulation mode again, or instead, one specific one – “Where is the decrease in color saturation?” It does not happen; only the set screen brightness changes, which can be freely changed later. There are no changes after switching to Rec.709 mode; the color gamut remains at the factory level. We tried resetting the monitor settings several times, using an HDMI connection instead of DP, and repeatedly checking the other settings. Everything is clear and has no problems, but the emulation remains inoperative.
Thus, this material will permanently work with the full-color gamut, and shades exceeding the standards under study can be dealt with only using suitable ICC/ICM profiles and software with standard color management system (CMS) support. Among these are Adobe products, XnView, FastStone Viewer, Windows photo viewers (7, 8, 10, 11), Opera, Firefox, Google Chrome, etc.
Brightness, Contrast, and Color Accuracy
The Acer Predator X34X has eight main preset modes, six “emulation” modes of various color standards, and a black-and-white mode (with shades of gray).
The default settings are Standard mode with the following settings:
- Brightness: 70
- Contrast: 50
- Constant Brightness — Off (was activated during testing)
- Color Temp.: Warm
- Gamma: 2.2
- Black Boost: 5
- Low Blue Light: Standard
- Color Space: General
- Optimal Pixel Edge: Off
The following settings were then used to achieve 100 nits brightness, 6500K white point color temperature, and other improvements:
- Brightness: 42
- Contrast: 50
- Constant Brightness: On
- Color Temp.: User (40/37/50)
- Gamma: 2.0
- Black Boost: 7
- Low Blue Light: Standard
- Color Space: General
- Optimal Pixel Edge: Off
The main changes were made by reducing the brightness, enabling the Constant Brightness function, adjusting the RGB Gain values, and changing the gamma mode and Black Boost level. The monitor does not need to adjust the contrast and saturation levels—you will only make it worse.
Now let’s look at all the data obtained, presented in the table below:
After activating the Constant Brightness function, the monitor will not spoil you with high brightness. But it will be much more comfortable – the brightness will not change with each change in the picture on the screen because the ABL brightness limitation function practically ceases to demonstrate itself. In this case, even after setting the brightness to 100%, the actual value does not exceed 250 nits, which will be more than enough. When reduced to the factory 70%, you can get 175 nits over almost the entire screen area.
Activating the Low Blue Light mode via the color temperature settings sets it to Level 2 from the primary color rendering settings section. The brightness does not decrease; you need to adjust it yourself. Only in sRGB is the level set to 30%, corresponding to 83-85 nits in the central part of the screen.
The contrast ratio is the same in all cases—it tends to infinity. The white point in the two main modes is from 5950 to 6450K with a minimum parasitic shade, but the average gamma value in the three studied presets indicates an excess of picture contrast. This is understandable—we have a classic representative of the first-generation W-OLED camp who wants to make everything darker and the final picture more contrasty.
However, the stability of the color temperature in shades of gray was not a problem —the results were high.
Let us remind you that only the Standard mode does its job thoroughly. In sRGB, accurate emulation is not performed, as evidenced by the received DeltaE94 deviations. The question is – where is the declared DeltaE<1 in the monitor, which, based on the report, should be characteristic of sRGB Mode? It does not exist and cannot exist. It is a bizarre policy of the Acer company to repeat software errors immediately on a series of its monitors but continue to demonstrate reports on the calibration of the corresponding mode…
The Low Blue Light mode only changes the color temperature to 5200-5400K, and the contrast is even slightly higher than at factory settings. Thus, you can’t count on a substantial load reduction.
The Acer Predator X34X, at default settings, demonstrates complete indistinguishability of deep shadows, a decrease in the brightness of mid-tones, the absence of RGB imbalance, as well as gray wedge dots concentrated in a dense group in the DeltaE<3 area – this is nice.
Due to the operating algorithms of the first-generation W-OLED, a full calibration is not recommended for this monitor, even with the Constant Brightness option enabled. Without this setting (as per the factory default), the Acer Predator X34X review unit produces significantly different results, as shown in the example above.
The correction curves created dramatically changed the contrast. All the bright areas became lighter, and the shadows became visible. This result and a couple of experiments conducted later confirmed that the stability of color rendering is highly questionable. The final result is practically identical.
As we have already discovered, the useless sRGB mode repeats the Standard. Only the white point with the gray wedge points has moved to the right and entered the 6000K area without a pronounced parasitic shade. Saturation does not decrease; the contrast is even higher than factory settings, and brightness can be adjusted, but there is no point. Accordingly, the sRGB mode in the X34X monitor should be forgotten.
Switching to Low Blue Light causes the dots to move to the “warm zone” with a slight greenish parasitic tint. The balance of the grayscale CT slightly deteriorates, and an imbalance between the RGB channels appears on the gamma curves. Otherwise, all the problems inherent to Standard and sRGB remain.
Color Temprature modes
Now, let’s look at the results of the special Color Temp modes. Recall that the manufacturer has set the Warm preset by default. Note that the values of its column coincide entirely with the results of the Standard mode from the first table of this testing subsection.
Observations Based on the Results:
- The default Warm mode doesn’t quite match its name, as it leans closer to a neutral 6500K white rather than a noticeably warm tone.
- In contrast, the Normal and Cool presets reflect their intended color temperatures more accurately. However, the Cool mode significantly increases color temperature deviations, which is undesirable but expected.
- The factory Low Blue Light modes (levels 2 and 3) are the best options for reducing eye strain and achieving a warmer image; their display modes aren’t necessary.
- User mode, which allows RGB adjustments, performs similarly to the factory Warm setting but introduces slightly higher deviations in the grayscale range. It’s best avoided unless needed.
This version improves clarity while maintaining the original meaning. Let me know if you’d like any tweaks!
Gradients Uniformity
The 10-bit OLED panel (with or without FRC—here, we can only guess) in the Acer Predator X34X demonstrated exceptionally high-quality gradients in uniformity in most of the tested modes but only at high levels of the set brightness.
After its decrease to ~60-75% and below, the quality of gradients decreases, a large number of sharp transitions with various parasitic shades appear, and the picture becomes dirty, with visual defects across the entire surface of the screen (various vertical and horizontal stripes, weakly expressed spots appear), the color temperature changes – the picture acquires a pronounced parasitic shade. This happens right before your eyes, and the reason for this, in all likelihood, is the limitation of the dynamic range during the adjustment of the Brightness value and not the highest stability of the operating characteristics of organic LEDs when the voltage on them changes.
You can do this without an additional correction profile created during calibration—it will only make things worse, as happened during our Acer Predator X34X review. Moreover, the monitor is not suitable for precise work with color anyway. It was created for content consumption and games.
A phenomenon familiar to many owners of OLED TVs and monitors — loss of visibility of deep dark shades — is also present in our Acer Predator X34X review model. With specific color settings, the device likes to paint the extreme dark areas in solid black, thereby increasing the overall contrast of the scene. At low brightness levels, the width of the zone with absolute black increases sharply.
This feature, evident even at factory settings with a high brightness value, can be slightly corrected by adjusting the Black Boost parameter in the model menu. However, the monitor’s ability to reproduce deep shadows disappears at particular parameter values. It’s up to you to decide what’s best. There is no ideal option here.
Contrast and White point stability, Brightness range
The standard mode was used to analyze contrast stability and brightness range. Brightness levels were adjusted from 100% to 0% in 10% increments, manually enabling the constant brightness function.
All brightness values were obtained at 100% screen fill (APL). The 15-250 nits range is comparable to 27-inch models with W-OLED. We did not find the declared 275 nits – no big deal.
Changing the APL level with the “constant brightness” function active practically does not change the obtained values. We also note that the transition from 100 to 0% brightness adjusted the overall color balance of the scene – the picture became “warm” with a pronounced greenish parasitic tint. This is easy to notice with the eyes, and nothing is pleasant here – the color temperature easily and quickly reached almost 6500K to 5400K.
Without this option, the monitor can demonstrate up to 410-412 nits at peak (for SDR) in a small screen area from 1 to 10% of its location (APL). The minimum value does not depend on the activity of the Constant Brightness function and remains at a level of ~15 nits.
As for the maximum capabilities of the Acer Predator X34X, when activating HDR with default settings at peak and 1-2% APL, the monitor demonstrated up to 1220 nits, which is quite close to the declared 1300 nits. But the monitor fell short of the claimed 800 nits at 10% APL by 70 nits – no big deal.
If you activate the Constant Brightness option in HDR mode, the resulting range decreases to 252-718 nits, depending on the fill level. We have no questions about the X34X’s speed indicators.
Refresh rate and Response time
For the Acer Predator X34Xb, the manufacturer has declared the standard 0.03 ms GtG and some “up to 0.01 ms MPRT”, as well as a maximum vertical refresh rate of 240 Hz without the need to activate additional overclocking (that is, this frequency is native to the panel). And if the last figure at the beginning of 2025 cannot surprise anyone much, then the declared response time is 30 times lower than that of the vast majority of gaming LCD monitors – quite capable.
Our Acer Predator X34X review unit was tested using familiar visual tests (like the TestUFO results presented above) and the OSRTT hardware and software complex.
We concluded that the clarity of the moving image on the OLED novelty fully corresponds to the level of a premium gaming monitor and visually significantly surpasses what the best high-speed IPS representatives from the camp of 144-240 Hz solutions in a comparable format can offer. As for the comparison with QD-OLED, the results are identical – there are no winners between QD-OLED and W-OLED in terms of speed, and there cannot be any.
The display shows minimal blurring and no visually noticeable artifacts. Increasing the frequency from 120 to 240 Hz significantly improves the smoothness and clarity of the picture, as demonstrated in the comparison image above.
During the OSRTT hardware and software testing, we checked the monitor’s operation only at the maximum frequency of 240 Hz. In this case, the average response time did not exceed 0.66 ms, and the fastest GtG transition occurred in 0.2 ms. There are very weak artifacts on the numbers, but we did not encounter them visually – you will not be able to do this either.
Viewing Angles
The Acer Predator X34X monitor is another OLED monitor we’ve tested. It proves that OLED technology has no competitors regarding viewing angles and overall picture stability.
The image above shows everything perfectly. When changing the viewing angle in a wide range, the color and brightness of the picture on the screen of our Acer Predator X34X review model change slightly but remain at a high level.
There is no glow effect, pasteurization of complex transitions does not occur, and parasitic shades are barely noticeable if they appear visually.
Brightness and Color temperature Uniformity
The monitor’s brightness and color temperature uniformity were evaluated at 35 points across the screen, with brightness between 115 and 120 nits. The test used a full-screen display (100% APL) for accurate measurement. The test field was displayed on the entire screen (100% APL). All calculations (deviations) were based on data from the central point. The Constant Brightness system was activated during testing.
With the brightness set, the average deviation from the center point was 2%, and the maximum was only 6%. This result is excellent for this class of device. The best representatives of the QD-OLED camp demonstrate similar results. It is tough to notice the drop in brightness detected during measurements with your eyes, but if you want to, you can.
The surface diagram clearly shows how the brightness level is concentrated across the matrix field. The brightest zone was shifted to the left edge of the screen and the darkest to the upper right corner of the panel.
The photo above shows a white field with minimal corrections in a graphics editor to more clearly represent what is happening on the screen in terms of the uniformity of the light field.
Problems can be demonstrated much more clearly by darker gray fills. The darker the gray field, the more pronounced all the features and defects of the surface uniformity are. Various vertical and horizontal stripes become visible (especially if you haven’t done a “screen cleaning” for a long time), and dynamic noise appears across the entire surface of the matrix. It doesn’t look good, and you must constantly deal with something like this while working on the monitor. This feature does not depend on the monitor. And you can temporarily remove some of the “artifacts” using 1-3 runs of the built-in “screen cleaning”. We warn you that artifacts may be there immediately after unpacking the monitor. It’s no big deal; do a couple of “cleanings.”
The uniformity of color temperature results were as follows: the average deviation from the center is 0.6%, and the maximum is 1.8%. The difference between the minimum and maximum did not exceed 190K. Among QD-OLED rivals, this is regarded as a mark of refined taste.
Final line
The Acer Predator X34X OLED monitor is a classic representative of the still-gaining popularity segment of ultra-wide displays with a working resolution of 3440 x 1440 pixels. Its main buyers will be fans of W-OLED technology and those who want to get a relatively deep black color at any level of external illumination at the workplace. The semi-matte working surface of the W-OLED panel used in the Predator also shows its anti-glare properties better than those of competitors on QD-OLED.
At the same time, it is not suitable for precise work with color, and you should not count on accurate color rendering even after a full calibration. The X34X will not please you with its picture stability.
Also see: Asus ROG Swift PG27AQDP OLED Monitor Review
The Acer Predator X34X OLED is available for $799.99 on Amazon and $849.99 on B&H Photo. With its premium features and competitive pricing, it’s worth considering. Choose wisely! How did you like this Acer Predator X34X review? Let us know your thoughts in the comments!
