Display
31.5-inch, IPS-ADS, 3840 x 2160
31.5
Refresh Rate
48 Hz - 144 Hz
48 Hz
Brightness
700 cd/m² (peak 1000 cd/m²)
700 cd
Contrast Ratio
1000 : 1
1000
Overview
The BenQ MOBIUZ EX321UX is a 31.5-inch 4K gaming monitor with DisplayHDR 1000 certification - a tier almost nothing else in this range reaches without being an OLED or a reference panel. It backs that with 700 cd/m2 typical brightness and a 1000 cd/m2 peak, which is exceptionally bright for a gaming LCD, plus 99% DCI-P3 on an IPS-ADS panel from BOE. It runs 144 Hz at 1 ms with FreeSync Premium Pro and 65 W USB-C. The honest limit is contrast at 1000:1, which caps how far the HDR can go despite the brightness. Buy it for bright-room HDR gaming at 4K; skip it if you play in the dark, where OLED blacks matter more than peak nits.
BrandBenQPanel TypeIPS-ADSResolution3840 x 2160Refresh Rate48-144 Hz
Key Highlights
- DisplayHDR 1000 - a tier almost no gaming LCD reaches
- 700 cd/m2 typical and a 1000 cd/m2 peak - exceptionally bright
- 99% DCI-P3 at 140 PPI across 31.5 inches
- 65 W USB-C with DP Alt Mode for laptop docking
- 144 Hz at 1 ms with FreeSync Premium Pro
Who Should Buy the Benq EX321UX
+ Best For
Bright-room HDR gaming
700 cd/m2 typical is unmatched by any OLED here
4K console and PC play
144 Hz with FreeSync Premium Pro
Laptop desks
65 W USB-C over a single cable
Colour-aware players
99% DCI-P3 for creative work too
× Not Ideal For
Dark-room gaming
1000:1 contrast is the ceiling
Competitive esports
144 Hz is below the 240 Hz class
Ergonomic desks
100 mm height, +/-15 swivel, no pivot
Desks needing audio
there are no speakers
Display Performance
Refresh Rate
48-144 Hz
high refresh at full 4K
Response Time
1 ms (GtG)
genuinely quick for a 4K IPS panel
Brightness
700 cd/m2 typical / 1000 peak
the brightest gaming LCD here
Contrast
1000:1
the limit; dimming zones are not published
Colour Gamut
99% DCI-P3
wide and accurate
HDR
DisplayHDR 1000
a genuinely high tier for a gaming panel
Gaming Performance
Refresh Rate144 Hzmatches what consoles and mid-high GPUs deliver at 4K
Response Time1 ms (GtG)fast for a 4K panel
VRR / Adaptive SyncAMD FreeSync Premium Protear-free with HDR frame data
GPU Requirementa strong card for 4K high-fps, or a current console
HDR & Brightness Reality
DisplayHDR 1000 on a gaming monitor is genuinely rare, and the brightness is real: 700 cd/m2 typical is more than double what any OLED here manages full-screen, and it peaks at 1000. In a sunlit room this will look dramatically better than a QD-OLED. The catch is contrast - 1000:1 with no published dimming zone count means the dark half of an HDR image stays grey. So it delivers the bright half of HDR superbly and the dark half poorly, which is exactly the opposite trade-off to OLED. Choose based on your room.
Connectivity & Ports
HDMIHDMI 2.1 inputsconsoles at 4K120
DisplayPortDisplayPort inputthe connection for the full 144 Hz
USB-C1 x USB-C, 65 W, DP Alt Modepicture, data and laptop charging
USB HubUSB-A downstream portsfor peripherals
Audio Out3.5 mmno built-in speakers on this model
Desk Fit & Ergonomics
Size / Footprint31.5-inch 16:9, 714 mm wide9.7 kg with the stand
StandIncluded, removable7.2 kg panel alone
VESA Mount100 x 100 mmstandard arm fit
Tilt-5 to +15 degreesa narrow range
Height Adjust100 mmmodest travel
Swivel / PivotSwivel +/-15 degrees, no pivotlimited movement
Real-World Use Cases
700 cd/m2 typical where OLEDs manage 250
HDMI 2.1 with 144 Hz and FreeSync Premium Pro
65 W USB-C over a single cable
99% DCI-P3 at 140 PPI
Pros & Cons
Pros
- DisplayHDR 1000 with 700 cd/m2 typical brightness
- 99% DCI-P3 at 140 PPI
- 144 Hz at 1 ms with FreeSync Premium Pro
- 65 W USB-C docking
- HDMI 2.1 for consoles at 4K120
Cons
- 1000:1 contrast caps the HDR despite the brightness
- No dimming zone count is published
- 100 mm height, +/-15 swivel, no pivot
- No speakers
Score & Ratings
8.2/10
Great
Model Information
7
| Specification | Value |
|---|---|
| Brand | BenQ |
| Series | MOBIUZ |
| Model | EX321UX |
| Model Alias | MOBIUZ EX321UX |
| Full Product Name | BenQ MOBIUZ EX321UX |
| Model Year | 2024 |
| Available Colors | White |
Display & Panel
6
| Specification | Value | What It Means |
|---|---|---|
| Screen Size | 31.5-inch | |
| Aspect Ratio | 16:9 | |
| Display Area | 88.43 % (percent) | |
| Panel Type | IPS-ADS (BOE) | IPS-ADS (BOE) - an IPS variant; wide angles, modest contrast. |
| Panel Technology | α-MLED technology | COG glass-based technology | Local dimming zones - 1152 | Number of mini LEDs - 4608 | |
| Backlight Type | Mini LED |
Resolution & Pixel Details
3
| Specification | Value | What It Means |
|---|---|---|
| Native Resolution | 3840 × 2160 | |
| Pixel Density | 140 PPI | 140 PPI - sharp at 4K across 31.5 inches. |
| Pixel Pitch | 0.182 mm (millimeters) |
Picture Quality & Color
3
| Specification | Value |
|---|---|
| Panel Bit Depth | 10 bits (8 bits + FRC) (FRC: Yes) |
| FRC | Yes |
| Display Colors | 1073741824 colors |
Refresh Rate, Response & Gaming
1
| Specification | Value |
|---|---|
| Refresh Rate Range | 48 Hz - 144 Hz |
Ports & Connectivity
7
| Specification | Value |
|---|---|
| HDMI Ports | 3× HDMI 2.1 |
| HDMI Version | HDMI 2.1 |
| DisplayPort Input | 1× DisplayPort 2.1 |
| DisplayPort Version | DisplayPort 2.1 |
| USB-C Video Input | 1× USB-C |
| DisplayPort Alt Mode | Yes |
| HDCP Support | Yes |
Audio, Camera, Network & Smart Features
1
| Specification | Value |
|---|---|
| Built-In Camera | No |
Ergonomics & Stand
5
| Specification | Value |
|---|---|
| VESA Mount | 100 × 100 mm |
| VESA Size | 100 × 100 mm |
| Removable Stand | Yes |
| Height Adjustment | 100 mm |
| Height Range | 100 mm |
Dimensions, Weight & Design
2
| Specification | Value |
|---|---|
| Weight With Stand | 9.7 kg |
| Weight Without Stand | 7.2 kg |
Power & Operating Conditions
6
| Specification | Value |
|---|---|
| Power Input | 100–240V |
| AC Frequency | 50/60Hz |
| Typical Power Consumption | 80W |
| Average Power Consumption | 80W |
| Maximum Power Consumption | 274W |
| Sleep Consumption | 0.5W |
Certifications, Standards & Licenses
2
| Specification | Value |
|---|---|
| EPEAT | EPEAT |
| TÜV Low Blue Light | TUV Rheinland Low Blue Light Certified (Software Solution) |
Frequently Asked Questions
01 Is DisplayHDR 1000 on an LCD better than OLED HDR? +
It depends entirely on your room. This holds 700 cd/m2 across a full screen where a QD-OLED manages 250 - so in daylight it looks far better. But its 1000:1 contrast means dark scenes stay grey, where OLED blacks are absolute. Bright room: this. Dark room: OLED.
02 Why is 700 cd/m2 typical significant? +
Because most panels quote a peak that only applies to small highlights. 700 cd/m2 typical means the whole screen can hold that brightness - which is what makes HDR usable with the curtains open.
03 Does it have local dimming? +
No zone count is published, which is a meaningful omission on a DisplayHDR 1000 panel. Without dimming, the brightness does the work and contrast stays at 1000:1. Ask the retailer before buying if this matters.
04 Is 144 Hz enough at 4K? +
For console gaming and most single-player, comfortably - it matches what a PS5 or Xbox sends. Competitive players will want the 240 Hz 4K panels, which cost considerably more and need a flagship GPU.
05 What is IPS-ADS? +
BOE's IPS variant - ADS stands for Advanced Super Dimension Switch. It behaves like IPS: wide viewing angles, accurate colour, and the usual modest contrast.
Reviews
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DISPLAYINPUT · INDEPENDENT · SPEC-BASED · NO SPONSORED PLACEMENT
SHEET № EX321UX