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31.5 inch flat black monitor on an ergonomic arm stand

BenQ

BenQ RD320UA 31.5" 4K monitor

SKU CH-J36P-0QWRD MPN RD320UA

A 31.5 inch 4K IPS programming monitor with 2000:1 contrast, 98% P3 colour, 90 W USB-C power delivery and an ergonomic arm stand

  • Cabinet ColorBlack
  • Screen Size31.5"
  • WidescreenYes
  • Resolution3840 x 2160 (4K)
  • Refresh Rate60Hz
  • Viewing Angle178° (H) / 178° (V)
  • 4K resolution with 3840 x 2160 pixels for sharp code readability
  • Nano Matte Panel cuts glare so text stays clear in bright rooms
  • 90W USB-C powers a laptop while carrying video and data
  • Night Hours Protection drops brightness for comfortable late-night coding
  • Ergonomic stand adjusts height tilt swivel for a healthier posture

Built for code clarity

The BenQ RD320UA is a 31.5 inch 4K monitor with a 3840 x 2160 IPS panel and a 2000:1 contrast ratio. Its Nano Matte surface reduces reflections while 98% P3 color coverage and DisplayHDR 400 certification provide accurate color for development work. A 90 W USB-C upstream port delivers video, data and power over a single cable.

Who this suits and who should look elsewhere

Developers who want a large, high-contrast screen with dedicated coding modes and Night Hours Protection will benefit from the ergonomic arm stand and MoonHalo bias lighting. Buyers who need a refresh rate above 60 Hz for competitive gaming should look elsewhere. Users who require multiple USB-C video inputs for daisy-chaining displays will not find that connectivity here.

The spec that decides the purchase

The single specification that determines fit is the 90 W USB-C power delivery combined with 4K 60 Hz video over one cable; if your laptop charges at or below 90 W and runs 3840 x 2160 at 60 Hz, this monitor serves as dock and display in one.

Highlights

  • 4K resolution with 3840 x 2160 pixels for sharp code readability
  • Nano Matte Panel cuts glare so text stays clear in bright rooms
  • 90W USB-C powers a laptop while carrying video and data
  • Night Hours Protection drops brightness for comfortable late-night coding
  • Ergonomic stand adjusts height tilt swivel for a healthier posture

Specifications

BrandBenQ
ModelRD320UA
Cabinet ColorBlack
Screen Size31.5"
WidescreenYes
Resolution3840 x 2160 (4K)
Refresh Rate60Hz
Viewing Angle178° (H) / 178° (V)
Display Colors1.07 Billion
Brightness400 cd/m2
Contrast Ratio2000:1
Aspect Ratio16:9
Response Time5 ms
PanelIPS
Color Gamut98% P3
HDR StandardHDR10
VESA Certified DisplayHDRDisplayHDR 400
Curved Surface ScreenFlat Panel
Video Ports1 x DisplayPort 1.4 / 2 x HDMI 2.0
USB Ports1 x USB Type-B Upstream (USB 3.2 Gen 1, 5 Gbps, Data only)
2 x USB Type-A Downstream (USB 3.2 Gen 2, 10 Gbps, power charging 4.5W)
1 x USB Type-C Downstream (USB 3.2 Gen 2, 10 Gbps, power charging 4.5W)
1 x USB Type-C Downstream (USB 3.2 Gen 2, 10 Gbps, power charging 7.5W)
HeadphoneYes
Power Supply100 - 240 VAC, 50/60Hz
Power ConsumptionPower Consumption (normal): 30W
Power Consumption (max): 220W
Power Consumption (sleep mode): <0.5W
Power Delivery(USB C / Thunderbolt): 90W
Stand AdjustmentsTilt (down/up): -5° - 20°
Swivel (left/right): 275° / 275°
Pivot: 90°
Height Adjustment Stand: 110 mm
Built-in SpeakersYes
VESA Compatibility - Mountable100 x 100mm
Dimensions18.5"-23.7" x 28.1" x 18.8" with base
16.7" x 28.1" x 3.5" without base
Weight24.2 lbs. with base
16 lbs. without base
Shipping weight19.43 kg
Package size830 × 515 × 283 mm

Questions about this item

Which video cable do I need already to run this 31.5" 4K panel at 60 Hz?

A DisplayPort 1.4 cable or an HDMI 2.0 cable will drive the 3840 x 2160 resolution at the full 60 Hz refresh rate.

Can I keep using my older DisplayPort 1.2 or HDMI 1.4 cables with this monitor?

Yes, older cables will work but they are limited to lower bandwidth, so you may not reach the full 4K 60 Hz signal.

How can I confirm the Nano Matte Panel is reducing glare as intended after I set it up?

View a bright window or lamp reflection on the screen; the anti-glare coating should diffuse the highlight into a soft, low-contrast glow rather than a sharp mirror image.

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