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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

  • Screen size31.5 in (80 cm)
  • Display resolution3840 × 2160 (4K)
  • Refresh frequency60 Hz
  • Panel typeIPS
  • Pixel response time5 ms
  • HDR formatHDR10
  • 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.

How it compares

Measured against everything we stock in Desktop PC Monitors, at today’s prices. Recalculated every night.

Price $667.99
Pricier than about 90% of the 530 comparable items (median $193.49).
Screen size 31.5 in (80 cm)
Higher than about 86% of the 479 comparable items (median 27 in).
Refresh frequency 60 Hz
Lower than about 70% of the 303 comparable items (median 100 Hz).

Specifications

Product
Brand nameBenQ
Model nameRD320UA
Case colorBlack
Display
Screen size31.5 in (80 cm)
Display resolution3840 × 2160 (4K)
Refresh frequency60 Hz
Panel typeIPS
Pixel response time5 ms
HDR formatHDR10
Image brightness400 cd/m2
Screen curvatureFlat Panel
Widescreen formatYes
Viewing angles178° (H) / 178° (V)
Colors displayed1.07 Billion
Contrast2000:1
Screen ratio16:9
Color gamut coverage98% P3
DisplayHDR certificationDisplayHDR 400
Audio & video
Integrated speakersYes
Ports & slots
Video connectors1 x DisplayPort 1.4 / 2 x HDMI 2.0
USB connections1 x USB Type-B Upstream (USB 3.2 Gen 1, 5 Gbit/s, Data only)
2 x USB Type-A Downstream (USB 3.2 Gen 2, 10 Gbit/s, power charging 4.5 W)
1 x USB Type-C Downstream (USB 3.2 Gen 2, 10 Gbit/s, power charging 4.5 W)
1 x USB Type-C Downstream (USB 3.2 Gen 2, 10 Gbit/s, power charging 7.5 W)
Headphone jackYes
Power
Power draw(normal): 30 W
Power Consumption (max): 220 W
Power Consumption (sleep mode): <0.5 W
Power Delivery(USB C / Thunderbolt): 90 W
Power supply100–240 VAC, 50/60 Hz
Size & build
Stand adjustabilityTilt (down/up): -5° - 20°
Swivel (left/right): 275° / 275°
Pivot: 90°
Height Adjustment Stand: 110 mm
VESA mounting pattern100 × 100 mm
Product dimensions18.5 in-23.7 in × 28.1 in × 18.8 in with base
16.7 in × 28.1 in × 3.5 in without base
Product weight24.2 lb with base
16 lb 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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