MSI MAG 321UP QD-OLED computer monitor 80 cm (31.5 inch) 3840 x 2160 pixels 4K Ultra HD Black

The MSI MAG 321UP QD-OLED is a 31.5" 4K (3840 x 2160) gaming monitor that uses a next‑generation QD‑OLED panel to deliver vivid colors and deep blacks. It features a high 165 Hz refresh rate, a very fast 0.03 ms (GtG) response time, and VESA certifications including ClearMR 9000 and DisplayHDR True Black 400. The monitor includes HDMI 2.1 connectivity with 48 Gbps bandwidth, 120 Hz console support, VRR and ALLM, and comes with OLED Care 2.0 to reduce the risk of image retention.

Advantages

The QD‑OLED panel provides improved color saturation and contrast compared with conventional panels while the 165 Hz refresh rate and near‑instant response minimize motion blur in fast gameplay. VESA ClearMR 9000 and DisplayHDR True Black 400 certifications ensure accurate motion handling and deep HDR blacks. OLED Care 2.0 adds preventative measures to lower burn‑in risk. HDMI 2.1 ports with 48 Gbps and VRR/ALLM support make the monitor suitable for modern consoles and high‑bandwidth PC graphics.

Suitable for

• Competitive and immersive gaming on PC and consoles
• Multimedia and movie playback that benefits from deep blacks and wide color gamut
• Content review and creative work requiring accurate color and high resolution
• General desktop productivity with multi‑window 4K workspace

Key specifications

• Display size: 31.5"
• Resolution: 3840 x 2160 (4K UHD)
• Panel type: QD‑OLED
• Refresh rate: 165 Hz
• Response time: 0.03 ms (GtG) / Product data lists 1 ms
• Brightness (typical): 250 cd/m²
• Contrast ratio (typical): 1,500,000:1
• Aspect ratio: 16:9
• Viewing angles: 178° / 178°
• HDMI: HDMI 2.1 with 48 Gbps (supports 120 Hz, VRR, ALLM)
• USB Type-C downstream ports: 1
• VESA mounting: Yes
• Built‑in speakers: No
• Energy class (SDR/HDR): G / G
• Colour: Black

How to use

Place the monitor on a stable surface or mount it using a compatible VESA arm. Connect your PC or console using the HDMI 2.1 ports to enable high refresh rates and VRR; use the USB‑C downstream port as needed for compatible peripherals. Adjust brightness, color presets and OLED Care 2.0 settings in the on‑screen display menu to match your environment and content type. For console gaming, enable 120 Hz output and VRR in the console settings when supported.

Recommendations

To help reduce the risk of OLED image retention, vary content regularly, use built‑in pixel shift or screen saver features, keep brightness at appropriate levels for your environment, and enable OLED Care 2.0 options as provided in the monitor settings.