BenQ
BenQ EX321UZ 31.5" OLED 4K 240Hz gaming monitor
A 31.5" OLED panel delivers 4K resolution at 240Hz with 0.03ms response and 99% DCI-P3 colour
- Cabinet ColorWhite
- Screen Size31.5"
- WidescreenYes
- Glare ScreenGlossy Anti-Reflection
- PanelOLED
- Display TypeUHD
- Deep blacks from 1,500,000:1 OLED contrast
- Smooth 4K motion at 240 Hz refresh
- Near-instant 0.03 ms response for competitive play
- Tear-free gaming via FreeSync Premium Pro
- 99 % DCI-P3 colour on 1.07 billion shades
31.5" OLED 4K 240Hz gaming monitor
The BenQ MOBIUZ EX321UZ is a 31.5-inch OLED display built for high-refresh 4K gaming. Its panel delivers a 0.03 ms response time and a 1,500,000:1 contrast ratio with 99% DCI-P3 colour coverage. Connectivity includes two HDMI 2.1 ports, one DisplayPort 1.2 and a USB-C input with DisplayPort Alternate Mode. The stand provides height, swivel and tilt adjustment for ergonomic positioning.
Competitive 4K gamers and HDR media viewers
This monitor suits players who want 240 Hz at 3840 x 2160 with near-instant pixel response and deep blacks. The glossy anti-reflection surface enhances perceived contrast in controlled lighting. Buyers who need higher full-screen brightness for sunlit rooms or who require a curved ultrawide format for immersion should look at alternatives.
0.03 ms OLED response time
The 0.03 ms grey-to-grey transition is the specification that defines motion clarity on this panel. Combined with 240 Hz refresh and FreeSync Premium Pro adaptive sync, it virtually eliminates ghosting and tearing in fast-paced titles. If your workflow prioritises static text clarity or maximum sustained brightness over motion performance, a different panel technology may be preferable.
Highlights
- Deep blacks from 1,500,000:1 OLED contrast
- Smooth 4K motion at 240 Hz refresh
- Near-instant 0.03 ms response for competitive play
- Tear-free gaming via FreeSync Premium Pro
- 99 % DCI-P3 colour on 1.07 billion shades
Specifications
| Brand | BenQ |
|---|---|
| Series | MOBIUZ |
| Model | EX321UZ |
| Cabinet Color | White |
| Screen Size | 31.5" |
| Widescreen | Yes |
| Glare Screen | Glossy Anti-Reflection |
| Panel | OLED |
| Display Type | UHD |
| Adaptive Sync Technology | FreeSync Premium Pro (AMD Adaptive Sync) |
| Resolution | 3840 x 2160 (4K) |
| Viewing Angle | 178° (H) / 178° (V) |
| Aspect Ratio | 16:9 |
| Brightness | 300 cd/m2 |
| Contrast Ratio | 1,500,000:1 |
| Response Time | 0.03 ms |
| Color Gamut | DCI-P3 99% |
| Display Colors | 1.07 Billion |
| Refresh Rate | 240Hz |
| HDR Standard | HDR10 |
| VESA Certified DisplayHDR | DisplayHDR True Black 500 |
| Curved Surface Screen | Flat Panel |
| Video Ports | 1 x DisplayPort 1.2 / 1 x USB-C (DP Alternative) / 2 x HDMI 2.1 |
| USB Ports | 1 x USB Type-C upstream (USB 3.2 Gen 1, 5 Gbps, data only) 1 x USB Type-C downstream (USB 3.2 Gen 1, 5 Gbps, power charging 7.5W) 2 x USB Type-A downstream (USB 3.2 Gen 1, 5 Gbps, power charging 4.5W) |
| Power Supply | 100 - 240 VAC, 50/60Hz |
| Power Consumption | Power Consumption (normal): 45W Power Consumption (max): 300W Power Consumption (sleep mode): < 0.5W |
| Stand Adjustments | Height, Swivel, Tilt |
| Built-in Speakers | No |
| Built-in Webcam | No |
| VESA Compatibility - Mountable | 100 x 100mm |
| Dimensions | 19.61"-23.54" x 28.31" x 8.78" with stand 16.46" x 28.31" x 3.27" without stand |
| Weight | 18.28 lbs. with stand 13.21 lbs. without stand |
| Shipping weight | 12.50 kg |
| Package size | 824 × 640 × 188 mm |
Questions about this item
What refresh rate does the HDMI 2.1 port cap at for 4K on the EX321UZ?
The two HDMI 2.1 ports support 4K UHD at the panel's full 240 Hz refresh rate.
What VESA mount pattern does the 31.5 inch EX321UZ use?
The monitor uses a standard 100 x 100 mm VESA mounting pattern for arms or wall brackets.
How do I enable 240 Hz on the EX321UZ, and what step is often missed?
Connect via DisplayPort 1.2 or HDMI 2.1, then set 240 Hz in Windows display settings; the step often missed is enabling FreeSync Premium Pro in the monitor OSD.
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