Display
31.5-inch, QD-OLED, 3840 x 2160
31.5
Refresh Rate
48 Hz - 240 Hz
48 Hz
Brightness
250 cd/m² (peak 1000 cd/m²)
250 cd
Contrast Ratio
1500000 : 1
1500000
Overview
Thirty-two-inch OLED, the BenQ EX321UZ places a 3840 x 2160 QD-OLED (Samsung) panel inside a 31.5-inch monitor focused on high-end PC and console gaming. Its 139 PPI pixel density, 250 cd/m² typical brightness and 1500000 : 1 contrast define the everyday image in practical terms. Motion is rated at 0.03 ms (GtG). The useful part is fast motion, deep blacks and wide-gamut HDR, supported by AMD FreeSync Premium Pro. Usb-c supplies up to 90w, the usb hub reduces desk clutter. The trade-offs are clear: speakers are not included; OLED ownership still requires sensible static-content habits. Compared with the EX271UZ, the choice rests on the published size, resolution, stand or hub differences. Buy it if you want OLED contrast and very high refresh at this size; skip it if you mainly show static office content or want a worry-free budget panel.
BrandBenQPanel TypeQD-OLED (Samsung)Resolution3840 x 2160Refresh Rate48 Hz - 240 Hz
Key Highlights
- 3840 x 2160 at 31.5-inch gives 139 PPI for very fine text and detailed work.
- The 48 Hz - 240 Hz range makes BenQ EX321UZ a serious high-refresh option.
- USB-C with 90W charging turns the monitor into a practical laptop connection point.
- A 100 mm height range, ±15° swivel and No pivot give the stand useful adjustment.
- The EX321UZ is larger at 31.5 inches and carries DisplayHDR 500 True Black; the EX271UZ is denser at 165 PPI with DisplayHDR 400 True Black.
Who Should Buy the Benq EX321UZ
+ Best For
High-refresh gamers
BenQ EX321UZ combines 240 Hz with 0.03 ms GtG.
HDR game players
HDR10 / DisplayHDR 500 True Black and 1000 cd/m² peak brightness support real highlight contrast.
Colour-rich media users
DCI-P3 99% and OLED blacks suit games and films.
× Not Ideal For
HDR specialists
HDR10 / DisplayHDR 500 True Black and 1000 cd/m² limit certified highlight performance.
One-cable laptop buyers
the hub is useful, but the panel specification may be the larger compromise.
Demanding gamers
48 Hz - 240 Hz and 0.03 ms (GtG) are excellent, but OLED care remains part of ownership.
Display Performance
Refresh Rate
48 Hz - 240 Hz
Very smooth motion, provided the system can supply enough frames.
Response Time
0.03 ms (GtG)
Adequate for the monitor's stated use, though overdrive behaviour is not published.
Brightness
250 cd/m² typical; 1000 cd/m² peak
Strong highlight potential for this class.
Contrast
1500000 : 1
OLED-level black control supports dark scenes.
Colour Gamut
DCI-P3 99%
Wide gamut supports richer game and media colour.
HDR
HDR10 / DisplayHDR 500 True Black
Hardware evidence supports real HDR contrast.
Gaming Performance
Refresh Rate48-240 Hzesports-grade for a QD-OLED panel
Response TimeOLED-classamong the fastest panel types available
VRR / Adaptive SyncSupportedtear-free across the range
GPU Requirementa strong card is needed to push high frame rates at this resolution
HDR & Brightness Reality
BenQ EX321UZ carries HDR10 / DisplayHDR 500 True Black, backed by 1000 cd/m² peak brightness, 1500000 : 1 contrast and DCI-P3 99%. Pixel-level light control gives small highlights and dark scenes a genuine advantage over ordinary LCD monitors. The 250 cd/m² typical figure also shows that full-screen brightness is much lower than the quoted peak. This is credible HDR hardware, but the peak applies to limited highlight areas rather than an entire bright desktop.
Connectivity & Ports
HDMI2 x HDMI 2.1 (eARC)HDMI 2.1 is listed, useful for modern PCs and consoles.
DisplayPort1 x DisplayPort 2.1 (UHBR20; 80 Gbps)DisplayPort handles the primary PC connection.
USB-C1 x USB 3.2 (Type-C; Gen 1; 5 Gbps; upstream; data only) / 1 x USB 3.2 (Type-C; Gen 1; 5 Gbps; upstream; 90W; DP Alt Mode) / 1 x USB 3.2 (Type-C; Gen 1; 5 Gbps; downstream; 7.5W; DP Alt Mode)DP Alt Mode plus 90W charging suits a one-cable laptop desk.
USB Hub2 x USB 3.2 (Type-A; Gen 1; 5 Gbps; downstream; 4.5W)The listed USB hub can keep basic peripherals attached to the monitor.
Audio Out1 x 3.5 mm Audio OutHeadphones or external speakers can connect directly.
Desk Fit & Ergonomics
Size / Footprint31.5-inch; 718.88 mm wide; 223.42 mm deepCheck the published depth before placing it on a shallow desk.
StandRemovableFull height, swivel and pivot adjustment supports shared or long-session desks.
VESA Mount100 x 100 mmA compatible arm can free desk space or solve stand limitations.
Tilt-5° to +15°Enough for basic vertical angle correction.
Height Adjust100 mmUseful range for eye-level alignment.
Swivel / Pivot±15° / NoFlexible for shared seating and portrait work.
Real-World Use Cases
Use BenQ EX321UZ for fast PC games where 240 Hz and 0.03 ms GtG matter.
HDR10 / DisplayHDR 500 True Black plus 1000 cd/m² peak brightness give dark scenes real contrast.
HDMI 2.1 inputs suit modern consoles, subject to the source device's supported modes.
The sharp 139 PPI image helps work, but static content should be managed sensibly on OLED.
Pros & Cons
Pros
- 3840 x 2160 resolution at 31.5-inch delivers 139 PPI for this desk size.
- 48 Hz 240 Hz motion is exceptionally fast.
- 1500000 : 1 contrast gives excellent dark-scene control.
- The adjustable stand supports better desk ergonomics.
- USB-C with 90W charging reduces laptop cabling.
Cons
- No confirmed built-in speaker wattage on the published sheet
- 139 PPI is softer than the smaller EX271UZ sibling's 165 PPI
- Large 31.5-inch footprint needs real desk depth
- Premium OLED pricing
Score & Ratings
8.6/10
Great
Model Information
7
| Specification | Value |
|---|---|
| Brand | BenQ |
| Series | MOBIUZ |
| Model | EX321UZ |
| Model Alias | MOBIUZ EX321UZ |
| Full Product Name | BenQ EX321UZ |
| Model Year | 2025 |
| Available Colors | White |
Display & Panel
5
| Specification | Value | What It Means |
|---|---|---|
| Screen Size | 31.5-inch | |
| Aspect Ratio | 16:9 | |
| Display Area | 91.13 % (percent) | |
| Panel Type | QD-OLED (Samsung) | QD-OLED (Samsung) - pixel-level light control gives near-black blacks and rapid transitions; static desktop use still needs care. |
| Backlight Type | Self-emissive (no backlight — OLED) |
Resolution & Pixel Details
3
| Specification | Value | What It Means |
|---|---|---|
| Native Resolution | 3840 × 2160 | |
| Pixel Density | 139 PPI | 139 PPI - 139 PPI is very sharp at desk distance. |
| Pixel Pitch | 0.155 mm (millimeters) |
Picture Quality & Color
2
| Specification | Value |
|---|---|
| Panel Bit Depth | 10 bits |
| Display Colors | 1073741824 colors |
Refresh Rate, Response & Gaming
1
| Specification | Value |
|---|---|
| Refresh Rate Range | 48 Hz - 240 Hz |
Ports & Connectivity
8
| Specification | Value |
|---|---|
| HDMI Ports | 2× HDMI 2.1 |
| HDMI Version | HDMI 2.1 |
| HDMI eARC | Yes |
| 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 |
Power & Operating Conditions
3
| Specification | Value |
|---|---|
| Power Input | 100–240V |
| AC Frequency | 50/60Hz |
| Sleep Consumption | 0.3W |
Certifications, Standards & Licenses
3
| Specification | Value |
|---|---|
| EPEAT | EPEAT |
| TÜV Flicker-Free | TÜV Rheinland Flicker-free Certified |
| TÜV Low Blue Light | TÜV Rheinland Low Blue Light Certified (Hardware Solution) |
Frequently Asked Questions
01 What does 139 PPI mean on the BenQ EX321UZ? +
At 31.5-inch, 139 PPI makes text very fine. Viewing distance and operating-system scaling still affect perceived sharpness.
02 How flexible is the BenQ EX321UZ stand for a full working day? +
It provides 100 mm height adjustment, ±15° swivel, No pivot and -5° to +15° tilt. That is a strong ergonomic set.
03 Where does the BenQ EX321UZ differ from the EX271UZ? +
Both belong to a closely related family, but the published size, resolution, stand or hub details are not automatically identical. Compare those fields directly rather than choosing by suffix alone.
04 What is the biggest image limitation of the BenQ EX321UZ? +
OLED can produce deep blacks, but static desktop content still needs sensible management. The sheet does not replace independent response, calibration or uniformity testing.
05 How should the BenQ EX321UZ response-time claim be read? +
Adequate for the monitor's stated use, though overdrive behaviour is not published. The final result also depends on overdrive tuning and refresh rate.
Reviews
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DISPLAYINPUT · INDEPENDENT · SPEC-BASED · NO SPONSORED PLACEMENT
SHEET № EX321UZ