Dell - UltraSharp U3825QW vs Samsung - ViewFinity S9 (S90PC)
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Dell - UltraSharp U3825QW | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| Refresh rate | 120 Hz | 60 Hz |
| USB-C Power Delivery | 140 W | 90 W |
| Screen size | 37.5 " | 27 " |
| Peak brightness | 450 nits | 600 nits |
Between the UltraSharp U3825QW and ViewFinity S9 (S90PC), the UltraSharp U3825QW comes out ahead in refresh rate / usb-c power delivery, while the ViewFinity S9 (S90PC) wins on peak brightness. Overall, the UltraSharp U3825QW scores 68.4 and the ViewFinity S9 (S90PC) scores 65.9 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (68.4 vs 65.9). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the UltraSharp U3825QW if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. The biggest gaps in its favor are refresh rate, usb-c power delivery, screen size. The single most decisive one: Refresh rate — 100.00% more. 120 Hz vs 60 Hz.
Pick the ViewFinity S9 (S90PC) if you care most about peak brightness. Its strongest claims are peak brightness. The single most decisive one: Peak brightness — 33.33% more. 600 nits vs 450 nits.
Both ship with comparable response time (gtg), dci-p3 coverage, panel type, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Dell - UltraSharp U3825QW or Samsung - ViewFinity S9 (S90PC)?
Dell - UltraSharp U3825QW leads the current Mars Score by 2.5 points.The more useful decision is the trade-off behind that result: compare screen size, refresh rate against the way you will actually use the product.
Choose Dell - UltraSharp U3825QW if…
Dell - UltraSharp U3825QW has the measurable edge on refresh rate hz, has usb c pd w, screen size in.
Choose Samsung - ViewFinity S9 (S90PC) if…
Samsung - ViewFinity S9 (S90PC) has the measurable edge on peak brightness nits.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Dell - UltraSharp U3825QW wins
- ▲Refresh rate — 100.00% more. 120 Hz vs 60 Hz.
- ▲USB-C Power Delivery — 55.56% more. 140 W vs 90 W.
- ▲Screen size — 38.89% more. 37.5 " vs 27 ".
Why Samsung - ViewFinity S9 (S90PC) wins
- ▲Peak brightness — 33.33% more. 600 nits vs 450 nits.
Spec comparison
Panel
| Spec | Dell - UltraSharp U3825QW | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| Screen size | 37.5 "lead | 27 " |
| Panel typeⓘ | IPS | IPS |
| Resolutionⓘ | 4K | 5Klead |
| Aspect ratioⓘ | 21:9 | 16:9 |
| Curvedⓘ | truelead | false |
Performance
| Spec | Dell - UltraSharp U3825QW | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| Refresh rateⓘ | 120 Hzlead | 60 Hz |
| Response time (GtG)ⓘ | 5 ms | 5 ms |
| Peak brightnessⓘ | 450 nits | 600 nitslead |
| DCI-P3 coverageⓘ | 99 % | 99 % |
| HDRⓘ | true | true |
| G-Syncⓘ | false | false |
| FreeSyncⓘ | false | false |
Connectivity
| Spec | Dell - UltraSharp U3825QW | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| HDMI ports | 2lead | 1 |
| DisplayPort ports | 1lead | 0 |
| USB-C inputⓘ | true | true |
| USB-C Power Deliveryⓘ | 140 Wlead | 90 W |
| KVM | truelead | false |
Frequently asked
Which has higher refresh rate, UltraSharp U3825QW or ViewFinity S9 (S90PC)?+
UltraSharp U3825QW refreshes at 120Hz vs 60Hz.
Which has faster response time, UltraSharp U3825QW or ViewFinity S9 (S90PC)?+
ViewFinity S9 (S90PC) responds in 5ms vs 5ms.
Does UltraSharp U3825QW or ViewFinity S9 (S90PC) have USB-C with power delivery?+
Both offer USB-C PD — 140W on UltraSharp U3825QW, 90W on ViewFinity S9 (S90PC).