BenQ RD280U vs Dell U3421WE 34"
Side-by-side comparison of viewing distance, PPI, and specifications
Category Ranking
Pixel Density (PPI)67in category
BenQ RD280U164 PPI #18
Dell U3421WE 34"110 PPI #47
93 PPI224 PPI
HDR Peak Brightness67in category
BenQ RD280U400 nits #51
Dell U3421WE 34"300 nits #65
250 nits2000 nits
DCI-P3 Color Gamut63in category
BenQ RD280U93% #59
Dell U3421WE 34"95% #48
79%100%
Refresh Rate
BenQ RD280U60 Hz
Dell U3421WE 34"60 Hz
StandardHighUltra
Summary
- Sharpness: advantage BenQ RD280U — At 65cm, the BenQ RD280U is retina (164 PPI) while the Dell U3421WE 34" is not — you need to sit at least 80cm away for pixel-free viewing.
- Brightness: advantage BenQ RD280U — The BenQ RD280U is 17% brighter in SDR (350 vs 300 nits), a noticeable difference for outdoor readability. HDR peak: 400 vs 300 nits.
Key Differences
| Specification | BenQ RD280U | Dell U3421WE 34" |
|---|---|---|
| Resolution | 3840×2560 | 3440×1440 |
| Pixel Density (PPI) | 164 | 110 |
| Optimal Viewing Distance | 53cm | 80cm |
| SDR Brightness | 350 nits | 300 nits |
| HDR Peak Brightness | 400 nits | 300 nits |
| Contrast Ratio | 1:1,200 | 1:1,000 |
| Year | 2024 | 2021 |
| Screen Size | 28.2" | 34" |
| Color Gamut | sRGB 100% · DCI-P3 93% · Adobe RGB 87% | sRGB 99% · DCI-P3 95% |
All specifications
| Specification | BenQ RD280U 2024 | Dell U3421WE 34" 2021 |
|---|---|---|
| Screen Size | 28.2" | 34" (Better) |
| Resolution | 3840×2560 (Better) | 3440×1440 |
| Pixel Density (PPI) | 164 (Better) | 110 |
| Optimal Viewing Distance | 53cm (Better) | 80cm |
| Panel Type | IPS | IPS |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 3:2 | 21:9 |
| Refresh Rate | 60 Hz | 60 Hz |
| Variable Refresh Rate (VRR) | None | None |
| Response Time | 5 ms GTG | 5 ms GTG |
| HDR Certification | DisplayHDR 400 | None |
| SDR Brightness | 350 nits (Better) | 300 nits |
| HDR Peak Brightness | 400 nits (Better) | 300 nits |
| Contrast Ratio | 1:1,200 (Better) | 1:1,000 |
| Ports | 1x HDMI · 1x DP · USB-C · USB Hub | 2x HDMI · 1x DP · USB-C · USB Hub |
| USB-C Power Delivery | 90 W | 90 W |
| Color Gamut | sRGB 100% · DCI-P3 93% · Adobe RGB 87% | sRGB 99% · DCI-P3 95% (Better) |
| Year | 2024 (Better) | 2021 |
Frequently Asked Questions
Which has better PPI: BenQ RD280U or Dell U3421WE 34"?
The BenQ RD280U has 164 PPI compared to 110 PPI for the Dell U3421WE 34".
Which has a closer optimal viewing distance?
The BenQ RD280U requires 53cm vs 80cm for the Dell U3421WE 34" to reach retina quality.
Related Comparisons
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs BenQ RD280U 2024 · 164 PPI · 28.2" · 60 Hz
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs Dell U3421WE 34" 2021 · 110 PPI · 34" · 60 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs BenQ RD280U 2024 · 164 PPI · 28.2" · 60 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs Dell U3421WE 34" 2021 · 110 PPI · 34" · 60 Hz
Methodology & Sources
Formula: Retina distance (cm) = 3438 / PPI. Displayed values are rounded for readability.
Sources: Official manufacturer spec sheets and product pages. Specs are normalized before comparisons.
Comparison winners are calculated metric by metric (higher is better for most specs; lower is better for distance/response time).
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