BenQ MOBIUZ EX321UZ 31.5" 4K Ultra HD, QD-OLED Gaming Monitor with 240Hz, HDR, and USB-C hub

The BenQ MOBIUZ EX321UZ monitor uses a 31.5-inch QD-OLED panel for 4K gaming on PCs and consoles. Its 3840 × 2160 resolution provides fine detail across the large display area. A 240 Hz maximum refresh rate and 0.03 ms response time support clear motion during fast gameplay, while typical brightness is rated at 300 cd/m². The 1500000:1 typical contrast ratio delivers clear separation between dark and bright image areas.

Colour reproduction covers 99% of the DCI-P3 gamut, with support for 1.07 billion colours. DisplayHDR 500 handles compatible high dynamic range content, extending the range between highlights and shadows. The flat, anti-glare screen offers 178° horizontal and vertical viewing angles. Flicker-free operation and low-blue-light technology are included to reduce common sources of visual discomfort during longer sessions.

Connectivity comprises two HDMI 2.1 inputs, one DisplayPort 2.1 input, and a USB 3.2 Gen 1 hub with two downstream USB-A ports. A single USB-C upstream connection links the hub to a computer, while built-in speakers provide integrated audio. The stand offers up to 100 mm of height adjustment, –5° to 15° tilt, and –15° to 15° swivel. A 100 × 100 mm VESA interface allows use with a compatible monitor arm or wall mount.

• 16:9 native aspect ratio
• 140 ppi pixel density
• AMD FreeSync Premium Pro support for variable refresh rates
• Headphone output for private audio
• HDCP 2.3 support for protected digital content
• Energy efficiency class G in SDR, consuming 35 kWh per 1000 hours
• Detachable stand and HDMI cable included