Anandtech said:4K Support
A huge part of the Mac Pro revolves around its support for 4K displays. You can connect two 4K displays via Thunderbolt 2/DisplayPort, and the third 4K display over HDMI. Alternatively you can connect up to six 2560 x 1440 displays using the Thunderbolt 2 ports at the back of the machine.
While the 2013 MacBook Pro with Retina Display can presently support outputting to either an 3840 x 2160 or 4096 x 2160 external panel, the maximum supported refresh rate is only 30Hz under OS X (and only 24Hz in the case of a 4096 x 2160 display). Thats acceptable for use as a video preview display, but extremely frustrating for anything else (try watching a mouse cursor animate at 30Hz). Contrary to what Apples own support documentation lists, these 4K resolutions at limited refresh rates are supported via both HDMI and Thunderbolt 2/DisplayPort 1.2 on the new rMBPs.
To support 4K at 60Hz, you need to properly enable support for DisplayPort 1.2s Multi-Stream Transport (MST) feature...
The 4K/MST support requires a software component as well. The GPU driver needs to know how to divide its frame buffer for output to the individual tiles, which can vary between monitors. MST topologies for single-display/4K60 support arent standardized unfortunately. Apple handles this by maintaining some sort of a whitelist for various displays theyve tested. The Sharp PN-K321 that Apple sells alongside the Mac Pro (as well as the ASUS clone of it) ships with 4K60 support configured out of the box. All you need to do is ensure that DisplayPort 1.2 MST is enabled on the display itself (something that appears off by default) and plug it into the Mac Pro. OS X will automatically recognize the display, configure it for 3840 x 2160 at 60Hz and youre good to go.
The same isnt true, unfortunately, for other 4K displays on the market. Dell sent along its UltraSharp 24 Ultra HD display (UP2414Q) for this review, and unfortunately that appears to be a display thats not supported by the Mac Pro/OS X at this point. You can get it working in SST mode at 3840 x 2160 30Hz, but forcing MST results in a 1920 x 2160 display spread across both tiles with a mess of garbled colors.
The 4K Experience
...Moving to Sharps 32 4K PN-K321 brought back memories of my 30 days. The display is absolutely huge. OS X (and Windows 8.1) running at 3840 x 2160 is incredible, but I find that text, menus and UI elements can be too small. My eyesight isnt what it used to be and 3840 x 2160 on a 32 panel is just past the borderline of comfortable for me. For editing photos and videos its great, but for everything else the ~30% increase in pixel density was just too much.
Apple actually created a solution to this problem with the MacBook Pros Retina Display. On a 13 or 15-inch MacBook Pro with Retina Display Apple renders the screen at full panel resolution (e.g. 2880 x 1800), but renders things like text, menus and UI elements at 4x their normal resolution (2x in each dimension). In supported apps, photos and videos are rendered at a 1:1 ratio with pixels on screen. The combination of the two results in a display thats both incredibly high res and usable...
I was fully expecting all of this to be available on the Mac Pro when connected to a 32 4K display. By default, theres only a single supported scaled resolution: 2560 x 1440. Unfortunately it doesnt look like Apple is running the same supersampling routines when you pick this resolution, instead you get a 2560 x 1440 desktop scaled up to 3840 x 2160 (rather than a 5120 x 2880 screen scaled down). The result is a bit of a blurry mess...
Fucking Hell o_0
I wanted a Mac Pro for three reasons:
- Expandable internal storage
- Support for 4K displays
- Powerful GPU for gaming (even if I had to bootcamp Windows) and CPU for general tasks
This new Mac Pro struck out on all counts. Apple designed it for video editors (the minority who still happen to be using FCP) and ignored the desires of everyone else. Argh!1*?!
p.s
lol *smh*Anandtech said:The rest of the 4K experience under OS X was pretty good. The PN-K321 display seemed far more compatible with the Mac Pro setup than the UP2414Q. Wake from sleep wasn't an issue the vast majority of the time. I did have one situation where I had to disconnect/reconnect the DisplayPort cable after the display wouldn't wake up.