The catch
BenQ RD Series 28-inch Programming Monitor
Because 3:2 is taller than widescreen video, most films leave unused space above and below.
Side by side
RD280U is the pick for a tall coding workspace on a narrower desk. For design work and familiar video layouts on a larger 16:9 canvas, take the PD3205U.
Before you buy
Against 139.9 for PD3205U, RD280U works out to about 163.7 pixels per inch. A denser panel can draw finer text at the same logical size, and workspace is determined by comfortable scaling.
Where this comes from
Pixels per inch = √(width² + height²) / diagonal. The inputs are 3840 × 2560 at 28.2 inches and 3840 × 2160 at 31.5 inches. Because the diagonals are published nominal values, these figures are approximate.
The catch
Because 3:2 is taller than widescreen video, most films leave unused space above and below.
The catch
High-refresh gaming is not what a 60Hz panel is for.


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A tall coding workspace on a narrower desk is what RD280U is for. PD3205U suits a larger 16:9 canvas for design work and familiar video layouts.
The rated ceiling for charging a laptop is the same on both
Which one fits
Against PD3205U at 2160, RD280U has 2560 vertical pixels. At a suitable scaling setting, its 3:2 shape can show more document rows.
A 31.5-inch 16:9 display is what PD3205U is. RD280U measures 28.2 inches with a taller 3:2 ratio, so it does not offer the same larger widescreen canvas.
Across, PD3205U measures 714.7 mm and RD280U 610.4 mm. The 104.3 mm reduction can matter on a desk shared with other equipment.
The DesignVue control arrangement and a documented KVM come with PD3205U. Because both models have 90 W USB-C power, charging capacity alone does not choose between them.
In practice
Against 139.9 for PD3205U, RD280U works out to about 163.7 pixels per inch. A denser panel can draw finer text at the same logical size, and workspace is determined by comfortable scaling.
Pixels per inch = √(width² + height²) / diagonal. The inputs are 3840 × 2560 at 28.2 inches and 3840 × 2160 at 31.5 inches. Because the diagonals are published nominal values, these figures are approximate.
Per frame, RD280U draws 9.8 million native pixels and PD3205U 8.3 million. Refresh ceilings are 60Hz and 60Hz respectively.
Native pixels = width × height. Refresh interval =1000 / Hz, which gives 16.7 and 16.7 ms. These calculations concern signal and cadence and are not measured frame rates, input lag or pixel response.
Keeping the same 90W charging ceiling, RD280U is 104.3 mm narrower than PD3205U.
714.7 - 610.4 = 104.3 mm, or 4.11 inches. USB-C delivery of 90W is listed for both.

BenQ, RD280U
Code and documents fit well on this tall 3:2 screen, though the usable space depends on app layout and scaling. A laptop and a desktop can both be served through USB-C and a correctly connected KVM.

BenQ, PD3205U
Text and drawings come out physically bigger on this larger 4K design screen while the pixel count stays the same. A KVM and a 90-watt USB-C connection let a desktop and a laptop share one keyboard and screen.
Spec by spec
| Spec | BenQ RD Series 28-inch Programming Monitor | BenQ DesignVue 32-inch 4K USB-C | In practice |
|---|---|---|---|
| Native resolution | 3840 × 2560 | 3840 × 2160 | Usable logical workspace changes with operating-system scaling. |
| Panel diagonal | 28.2 in | 31.5 in | The measured active diagonal may differ slightly from a nominal screen class. |
| Maximum refresh | 60Hz | 60Hz | Look at the exact input, resolution and overclock conditions. |
| Panel technology | IPS | IPS | A measured color or motion winner is not established by panel type alone. |
| Laptop power | Up to 90W | Up to 90W | For the desired delivery, the host, cable and negotiated power profile all have to support it. |
| Chassis width | 610.4 mm | 714.7 mm | Leave additional room for cables, arms and neighboring equipment. |
| Stand depth | 244.5 mm | 256.8 mm | More desk depth can be taken by the included stand than by the display cabinet. |
Trade-offs
Decision guide
Take the RD280U for a tall coding workspace on a narrower desk. The PD3205U is better for a larger 16:9 canvas, design work and familiar video layouts.
90W USB-C power and a KVM come with each. With those shared, the screen shape and physical size make the clearer choice.
At the same 3840-pixel width, the RD280U adds 400 pixel rows. More vertical content can fit, provided the operating-system scaling you choose preserves the gain.
A 31.5-inch 16:9 panel is what the PD3205U has, while the RD280U packs a denser 28.2-inch 3:2 image. Decide whether physically larger content or more pixel density is what you want.
By the numbers
What we found across the computer monitors we compare, plus the checked facts behind each finding.
This guide keeps all 50 models in play. The pick rests on the facts and trade-offs on this page.
50 models fit, out of 50 checkedBenQ RD Series 28-inch Programming Monitor lists 164 ppi for computed pixel density, 17% more than the 140 ppi on BenQ DesignVue 32-inch 4K USB-C.
How we countedNo needs are preselected here. Open the matcher and add the ones that apply to your home, room or setup.
How we calculatedWe work out pixel density from the published diagonal and native resolution, rounded to the nearest whole pixel per inch. How large text looks still depends on operating-system scaling. For context, 44 of 50 models publish comparable figures.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| BenQ RD Series 28-inch Programming Monitor | None of these needs is a documented match |
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| BenQ DesignVue 32-inch 4K USB-C | None of these needs is a documented match |
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