If you are going to use the ASUS PQ321Q, you’re going to want DisplayPort 1.2 support. HDMI will work, but it’ll be choppy with its 30Hz refresh rate. If you have a video card with dual HDMI 1.4 outputs, you can use both of them to drive it at 60Hz if your video driver supports it. DisplayPort 1.2 allows for Multi-Stream Transport (MST) support, letting you drive two displays with a single DP cable. But why does that matter if the ASUS is your only monitor? Because to get the full 60Hz refresh rate out of it, DisplayPort needs to see it as a pair of 1920x2160 monitors that each get their own signal.

The ASUS has MST mode disabled by default. With my NVIDIA GTX 660 Ti I had to manually enable it in the monitor for it to turn on. I’ve been told that with ATI or Intel GPUs over DisplayPort 1.2 it is automatic, but I don’t have those to test with. Once enabled, it quickly went from 30 Hz to 60 Hz while staying at 3840x2160 resolution.

Since I run multiple displays like most people, this seemed to be an ideal time to test out Windows 8.1 and its ability to offer individual DPI scaling on monitors. For this test I used the ASUS PQ321Q, connected over DispayPort, and a Nixeus VUE 30 (review forthcoming) connected over DVI running at 2560x1600. With a single universal setting, you use a percentage setting for scaling in Windows 8.1. With individual control, you use a slider more like on a Retina MacBook Pro. The percentage is hidden, which I dislike. I don’t understand why we have a different way to select the scaling level if you have two monitors versus one. Perhaps it is a beta issue, but I think they should be uniform.

Moving beyond that, when I attempted to scale the PQ321Q, I had an image that was still fuzzy instead of sharp. Thankfully a driver update (as 4K MST panels are new) fixed this issue quickly. The independent display scaling in Windows 8.1 still didn’t work the way I wanted it to. The choices are unclear, including which monitor you are adjusting, and I never could get it setup exactly how I wanted it. I wound up setting it to 150% for both displays and dealing with my 27” running with larger icons than I prefer.

Now I have an effective 2560x1440 desktop, only everything is sharp. Amazingly sharp. It is like moving from my iPhone 3G to the iPhone 4 and its retina screen. The text as I write this in Word is crisp and clear, and editing gigantic spreadsheet in Excel is much easier when the cells are so easy to read. Unfortunately not every application in Windows plays well with DPI scaling.

Chrome is scaled 150% as Windows asked, but it is hazy and blurry. Disabling DPI scaling for the application and then scaling to 150% inside Chrome produces crisp, clear text. Firefox also didn’t scale automatically, but it has a setting to adjust to make it follow the Windows DPI scaling rules. Once set, Firefox looks very nice and crisp. For most people, that setting should already be set to follow DPI scaling.

Finding a chat client that works well is a challenge. Both Pidgin and Trillian don’t do DPI scaling and are fuzzy by default. Another app that had issues is Steam. Right-clicking in the System Tray icon brought up a menu in the middle of the screen, where it would be without DPI scaling. The reality is that some apps are great and support DPI scaling, and some need work, just like when the retina MacBook Pro was released. Evernote looks great, but Acrobat is a fuzzy mess. This is all a bit of growing pains, but I find myself disabling DPI scaling on applications that don’t support it because I prefer tiny and sharp to fuzzy and large.

Because the 2560x1440 resolution is what I’m used to with my usual 27” monitor, I found there to be no real difference in how I used the ASUS monitor. I typically split items to different sides of the screen, with Word on the right and Evernote on the left as I type this. The application that benefitted for me was image editing. Being able to fit more on the screen, or zoom in to higher levels, made working with images on the ASUS better than on a 27” of the same effective resolution. I don’t do that much image editing, but for the work I have done it has been wonderful.

You’ll also quickly find out how much people need to go back and fix up programs or websites to use images and text separately. Text combined in an image scales very poorly, but is often easier than doing proper layout for two separate elements. I feel a bit bad for all the developers that need to go back to fix everything to work with high-DPI screens, but that time has come.

The only way to sum up daily use of the ASUS PQ321Q is “awesome”. It’s not perfect, but much of that is the fault of Windows or other programs and websites. When you have something that can scale and look correct, it is amazing how much the extra pixel density and sharpness helps. Yes, this is the future for displays, and we are entering the transition period to get there.

Introduction, Design and Specs Internal Scaling, Brightness and Contrast
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  • peterfares - Wednesday, July 24, 2013 - link

    It's pretty easy to tell why they're getting 3200x1800 monitors. The super high DPI at that size and distance is unnecessary, but it has one HUGE advantage: You can use 200% scaling. That means things that aren't DPI-aware can run at standard DPI and then be doubled in width and height. This avoids the fuzzy effect like this article was complaining about when you use 150% on unsupported programs. With 200% scaling they'll look just like they do on a standard DPI display, not worse which is when happens when you use a decimal scaling factor. Reply
  • APassingMe - Tuesday, July 23, 2013 - link

    I'm concerned since you mention the "low" contrast numbers. The last time I checked, any number over 100:1 was due to software enhancements and was equivalent to a higher quality contrast that racked lower due to not having much or any software enhancement meaning that the current contrast numbers thrown around are just a bunch of marketing jumble.

    So wouldn't it be better to just measure the contrast with a 3rd party tool? As the numbers provided from the manufacture are pretty much a product of fiction + the marketing team, just my two cents
    Reply
  • APassingMe - Tuesday, July 23, 2013 - link

    my bad, that's ranked* not racked Reply
  • cheinonen - Tuesday, July 23, 2013 - link

    The number on the specs page is the one that the manufacturer quotes. In the test results you can see what we actually found. Desktop LCD numbers far fall behind what is possible with plasma TVs and the best LCOS projectors, or ever rear array LCD TVs. 100:1 would be insanely low and a poor design. Desktop LCDs are capable of 1000:1, without any sort of trick. Reply
  • APassingMe - Tuesday, July 23, 2013 - link

    I see, I could of been confusing the data with that from projectors; regardless I'm glad the test results are posted regardless as the definition of "contrast" can be a varying thing. Thanks for the swift response Reply
  • freedom4556 - Tuesday, July 23, 2013 - link

    Yeah, you were definitely thinking of those "dynamic" contrast ratios that are complete BS. They are usually more in the 100,000:1 or 1,000,000: range, though. Completely unreasonable. Reply
  • sheh - Tuesday, July 23, 2013 - link

    The official specs table lists the contrast as "800:01:00". Reply
  • cheinonen - Tuesday, July 23, 2013 - link

    Great, I'll fix that since apparently Excel decided to change that to a time or something else. But it's fixed now. Reply
  • Streetwind - Tuesday, July 23, 2013 - link

    31.5 inch is still too big for me. I'm not puttin anything over 24" on my desk. I've tried it, and I just can't like it.

    Unfortunately it seems that vendors are producing either tiny portable screens or gigantic TVs, and no real midsize desk monitors anymore. At least not outside the same old 1080p that we've been getting for the past 4 years.
    Reply
  • cheinonen - Tuesday, July 23, 2013 - link

    Well rumors are that Dell might be coming out with a 24" UHD display using a panel from LG. If that happens then I'll be happy to review that as well. Reply

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