HP - Z27k G3 4K USB-C 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 | HP - Z27k G3 4K USB-C | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| Peak brightness | 400 nits | 600 nits |
| USB-C Power Delivery | 100 W | 90 W |
| DCI-P3 coverage | 98 % | 99 % |
Between the Z27k G3 4K USB-C and ViewFinity S9 (S90PC), the Z27k G3 4K USB-C comes out ahead in usb-c power delivery, while the ViewFinity S9 (S90PC) wins on peak brightness / dci-p3 coverage. Overall, the Z27k G3 4K USB-C scores 63.3 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 (63.3 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 Z27k G3 4K USB-C if you care most about usb-c power delivery. The biggest gaps in its favor are usb-c power delivery. The single most decisive one: USB-C Power Delivery — 11.11% more. 100 W vs 90 W.
Pick the ViewFinity S9 (S90PC) if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are peak brightness, dci-p3 coverage. The single most decisive one: Peak brightness — 50.00% more. 600 nits vs 400 nits.
Both ship with comparable refresh rate, response time (gtg), screen size, 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: HP - Z27k G3 4K USB-C or Samsung - ViewFinity S9 (S90PC)?
Samsung - ViewFinity S9 (S90PC) leads the current Mars Score by 2.6 points.The more useful decision is the trade-off behind that result: compare the highlighted specifications against the way you will actually use the product.
Choose HP - Z27k G3 4K USB-C if…
HP - Z27k G3 4K USB-C has the measurable edge on has usb c pd w.
Choose Samsung - ViewFinity S9 (S90PC) if…
Samsung - ViewFinity S9 (S90PC) has the measurable edge on peak brightness nits, color gamut dci p3 pct.
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 HP - Z27k G3 4K USB-C wins
- ▲USB-C Power Delivery — 11.11% more. 100 W vs 90 W.
Why Samsung - ViewFinity S9 (S90PC) wins
- ▲Peak brightness — 50.00% more. 600 nits vs 400 nits.
- ▲DCI-P3 coverage — 1.02% more. 99 % vs 98 %.
Spec comparison
Panel
| Spec | HP - Z27k G3 4K USB-C | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| Screen size | 27 " | 27 " |
| Panel typeⓘ | IPS | IPS |
| Resolutionⓘ | 4K | 5Klead |
| Aspect ratioⓘ | 16:9 | 16:9 |
| Curvedⓘ | false | false |
Performance
| Spec | HP - Z27k G3 4K USB-C | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| Refresh rateⓘ | 60 Hz | 60 Hz |
| Response time (GtG)ⓘ | 5 ms | 5 ms |
| Peak brightnessⓘ | 400 nits | 600 nitslead |
| DCI-P3 coverageⓘ | 98 % | 99 %lead |
| HDRⓘ | true | true |
| G-Syncⓘ | false | false |
| FreeSyncⓘ | false | false |
Connectivity
| Spec | HP - Z27k G3 4K USB-C | Samsung - ViewFinity S9 (S90PC) |
|---|---|---|
| HDMI ports | 1 | 1 |
| DisplayPort ports | 1lead | 0 |
| USB-C inputⓘ | true | true |
| USB-C Power Deliveryⓘ | 100 Wlead | 90 W |
| KVM | truelead | false |
Frequently asked
Which has higher refresh rate, Z27k G3 4K USB-C or ViewFinity S9 (S90PC)?+
ViewFinity S9 (S90PC) refreshes at 60Hz vs 60Hz.
Which has faster response time, Z27k G3 4K USB-C or ViewFinity S9 (S90PC)?+
ViewFinity S9 (S90PC) responds in 5ms vs 5ms.
Does Z27k G3 4K USB-C or ViewFinity S9 (S90PC) have USB-C with power delivery?+
Both offer USB-C PD — 100W on Z27k G3 4K USB-C, 90W on ViewFinity S9 (S90PC).