BenQ RD280UG 28" 4K+ 120Hz Programming Monitor with MoonHalo

General

Display

Audio

Connectivity

Coding, Eye Care & Professional Features

Physical & Environmental

Power

Specifications are taken from BenQ's published product data for this model. Where BenQ does not publish a figure for this exact model it has been left out rather than estimated.

Mounting and orientation

The stand gives 150 mm of height travel — the most in the RD range — with -5° to 20° tilt, 15° swivel each way and a full 90° pivot. Auto Pivot rotates the image automatically as you turn the panel, so portrait needs no driver setting. In portrait the unit stands up to 714.5 mm tall, so check overhead clearance. For an arm, the monitor uses the standard 100 x 100 mm VESA pattern at 7.8 kg without the base; confirm your arm is rated for that weight.

Driving it at 4K+ 120Hz

3840 x 2560 at 120Hz is a demanding mode. HDMI 2.1 carries it, as does DisplayPort 1.4 and USB-C DisplayPort Alt Mode depending on the host's available bandwidth and any display stream compression it supports — confirm the output capability of your graphics card or laptop before assuming 120Hz at full resolution over every input. At 164 PPI, plan to run operating system display scaling rather than 100%, which both macOS and current Windows builds handle cleanly.

Two machines: KVM, PIP/PBP and DualView Plus

The KVM switch passes one keyboard and mouse between two connected computers along with the video source — connect one over USB-C and the other over HDMI or DisplayPort with the USB Type-B upstream cable. PIP/PBP puts both machines on screen simultaneously, useful when watching a build on one and editing on the other. DualView Plus splits the panel into two halves with independent colour modes, so you can run a coding mode beside a colour-accurate preview.

USB-C power, daisy chain and peripherals

USB-C delivers 90 W, enough for a 16-inch developer laptop or mobile workstation under genuine load, over the same cable as video and data. USB-C out with MST daisy chains a second display from this monitor rather than the host; MST behaviour depends on the graphics driver, so verify it before relying on it. Downstream ports run USB 3.2 Gen 2 at 10 Gbps — two Type-A plus two Type-C, one of which supplies 15 W.

In the box

• BenQ RD280UG monitor with ergonomic stand
• HDMI (v2.1) signal cable (may vary by region)
• USB 3.2 cable (may vary by region)
• USB-C cable (may vary by region)
• Quick Start Guide
• Warranty card
• Safety instruction sheet

Package contents follow BenQ's product data for this model; items not listed by BenQ are not claimed here.

BenQ RD programming range

• BenQ RD280UG product page
• BenQ RD280UG full specifications

SourceIT can email the current BenQ data sheet revision for the RD280UG on request with a quotation.

How do the four RD models differ — RD270Q, RD280U, RD280UG and RD320U?

The RD270Q is 27 inches, 2560 x 1440 QHD in 16:9 at 109 PPI and 144Hz — the entry model, and the only one without MoonHalo. The RD280U and this RD280UG share the 28.2-inch 3840 x 2560 3:2 panel at 164 PPI; the RD280U is 60Hz with 1200:1 contrast, HDMI 2.0 and no pivot, while the RD280UG is 120Hz with 2000:1 contrast, HDMI 2.1, FreeSync Premium, a 90° Auto Pivot, PIP/PBP and 10 Gbps USB. The RD320U is 31.5 inches, 3840 x 2160 4K in 16:9 at 140 PPI and 60Hz, with a wider 98% P3 gamut.

What does the "G" in RD280UG add over the RD280U?

The headline differences are refresh rate and contrast: 120Hz against 60Hz, and 2000:1 native contrast against 1200:1. It also adds HDMI 2.1, FreeSync Premium, a 90° pivot with Auto Pivot, PIP/PBP, DualView Plus, 150 mm of height travel instead of 110 mm, 3 W speakers instead of 2 W, and 10 Gbps USB downstream ports instead of 5 Gbps.

Does refresh rate actually matter for writing code?

More than most developers expect. At 120Hz, text stays legible while it scrolls, so you can read a long file or build log as it moves rather than stopping for the screen to settle. It is not a gaming argument at this level — it is a readability one.

Why a 3:2 panel instead of 16:9?

Code runs vertically. 3840 x 2560 gives 2560 pixels of height where a 4K 16:9 panel gives 2160 — roughly 18% more vertical space on a comparable diagonal. That means more lines of a file, a taller terminal and less scrolling. It is the main reason developers pick the 280-series over a conventional 4K monitor.

What is MoonHalo for?

It is a backlight ring on the rear of the chassis that lights the wall behind the monitor. In a dark room your eyes constantly re-adapt between a bright screen and black surroundings, which is a major source of fatigue; raising the ambient level behind the panel narrows that gap. BenQ fits MoonHalo to the RD280U, RD280UG and RD320U.

Can I run two computers from it?

Yes. The KVM switch hands one keyboard and mouse to whichever machine is the active video source — connect one over USB-C and the other over HDMI or DisplayPort plus the USB Type-B upstream cable. PIP/PBP shows both at once, and DualView Plus splits the screen into two halves with independent colour modes.

Will the 90 W USB-C port power my laptop?

90 W covers a 16-inch developer laptop or mobile workstation under real working load, not just at idle, while carrying video and data on the same cable. A machine with a high-power discrete GPU may still draw more during sustained rendering or compilation.

Does it come with a Singapore warranty and a GST invoice?

Yes. Every BenQ RD280UG sold by SourceIT comes with the BenQ Singapore 3 Year Local Warranty and a GST invoice.