Summary: I have two of these Sharp PN-K321 4k monitors along with a Dell 2407 HD monitor on my Windows 8.1 system. I'm using an Nvidia Quado K2200 video card to drive the 3 monitors I'm finding that they all work together fairly well.
Summary: I need an ultra-high res monitor that can rotate to vertical (portrait) so decided to try this one because Apple sells it for use with my new MacPro. Got it up and running horizontally (landscape) and used it for about two hours over a couple of days.
Excerpt: I have a new MacPro custom built 8 core. I use my new Sharp PNK 321 monitor for business, editing and all general purpose tasks.I do not believe there is a more clear quality monitor available in the market today. Love the quick wake up, perfection in color quality and ultimate sharpness.
Pros: Best Available4k Awesome, Great picture quality, Large Viewing Area, Reliable Performance, Thoughtful Power Consumpt, Ultimate Sharpness, Very Responsive
Summary: Bought this with the new (late 2013) Mac Pro and I'm ruined for other displays. Took a bit of fiddling to enable HiDPI on Mac OS X 10.9.2 (`sudo defaults write /Library/Preferences/com.apple.windowserver.plist DisplayResolutionEnabled -bool true`), and with the monitor's on-screen interface to...
Summary: I can't believe Sharp would ship this $3k monitor with dead pixels. This is totally unacceptable! One of the base mounting screws head snapped off during initial assembly. I didn't even get a chance to tighten it and it just snapped.
Summary: I've owned these monitors for about a month now and it took a lot of tweaking to get them working at 60hz. Once I was able to run 60hz on both monitors flawlessly their true quality finally showed.
Summary: This monitor ships in a broken state, and customers are left to hope that Sharp eventually ships a BIOS update to fix it. The core problem is that the monitor is limited to 4K 30Hz with an ordinary DisplayLink signal.
Excerpt: I primarily use the PNK321 for photo & video editing of NEF files generated from multiple Nikon D800 36 megapixel bodies. With file sizes ranging from 15MB JPEG to 50MP NEF, I selected 2) PNK321 monitors to replace 2) 30" Apple Cinema monitors.
Pros: 2 Watts Channel Audio, 2 Wpc Audio Is Handy, Attractive Design, Bright, Easily Calibrated, Ideal For Apple Mac Pro, Striking Contrast, Stunning Detail, Thunderbolt Connection
Cons: All Plastic Design, Delicate, Generic Design, Hard Buttons On Side, Led Temp 96 Degrees F, No Match To Apple Design, Substandard Base Support, Windows Only Software
Excerpt: I bought this monitor to turn my new 15 inch MacBook Pro Retina into a desktop via HDMI. The 4K images are awesome. Resolution, color depth, angle viewing, all are perfect. Of course HDMI 1.4 is limited to 30 frames per second at 4K. But I don't detect unacceptable choppiness in the videos.
Summary: Since this piece of hardware was announced, I was anxiously awaiting its release. The resolution and physical dimensions are great so I really wanted to love it. After a living with it for only a few months though, a major issue has become apparent.