When comparing ViewSonic VP2780-4K vs Dell UltraSharp U2715H, the Slant community recommends Dell UltraSharp U2715H for most people. In the question“What are the best monitors?” Dell UltraSharp U2715H is ranked 19th while ViewSonic VP2780-4K is ranked 120th. The most important reason people chose Dell UltraSharp U2715H is:
As expected from an IPS panel, viewing angles are great. Horizontal adjustments don't change the colors much at all. When tilting in the vertical axis, the image can darken slightly.
Specs
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Pros
Pro Responsive
The ViewSonic VP2780-4K is one of the most responsive 4K monitors in its price range thanks to its low input lag. Regarding the input lag, the VP2780 is one of the fastest 4K panels available on the market.
Pro Great viewing angles
As expected from an IPS panel, viewing angles are great. Horizontal adjustments don't change the colors much at all. When tilting in the vertical axis, the image can darken slightly.
Pro Lots of ports
With 5 USB 3.0 ports (one of which can act as a charger), 2 HDMI ports (with MHL), a DisplayPort and Mini DisplayPort, as well as a DisplayPort out port for daisy chaining multiple screens
Pro Fully adjustable
It has tilt, swivel, height adjust and can be pivoted 90 degrees in both directions.
Pro Great for multi-monitor setups
The thin plastic bezel (1mm) and small 6mm screen boarder makes this a great screen to put side by side with another to minimise the deadspace between dual monitor setups. Also, an extra DisplayPort out means daisy chaining is possible.
Pro Fantastic screen quality
Dell calibrates the U2715H's screen in the factory to very precise measurements, and each monitor will have their own unique calibration report.
Cons
Con Expensive
The price of the VP2780-4K is too high considering that you can get a cheaper monitor that does roughly the same job.
Con Buttons can be unresponsive
The captive buttons on the right side of the bottom bezel don't light up at all, and can be unresponsive when you first try to activate them.
Con Poor panel uniformity
While this will vary unit to unit, TFT Central found that the luminance uniformity on their unit was poor. The right side of the screen was up to 30% brighter than the left corners of the screen. It wasn't obvious at first glance, however for color-accurate work it could become an issue.