![]() ![]() Sarah Tew/CNETUp close, a patch of white water rolling through a creek clearly showed the display's pixel grid on the 2013 version, similar to our test pattern. Up close, you can see the pixel grid in the 2013 iMac on the right. For example, on a scene with fine branches passing in front of a tree, the 5K display showed finer detail among the delicate branches, while the 2013 display lost some of that detail in favor of harder edges, akin to turning off anti-aliasing on a video game. On closer examination, leaning in just inches from each, we found visible differences between the two displays. ![]() We ran an excellent native 4K video clip, created by Florian Friedrich of, on both machines side by side and under the same conditions we use to test television displays.įor the most part, our 4K video test files looked identical in terms of quality and sharpness on both screens, at least at first. On the 2013 iMac, close enough to the screen (less than about 12 inches), you can also see the pixel structure, which resembles a grid pattern.īut the real test is how each iMac would perform with 4K video. On the 5K display, the lines appeared, but softly, without the sharpness one might find on a true 4K display, which would match the pattern pixel-for-pixel. On the 2013 iMac, a bar within the pattern with a mutliburst pattern designed to display every other line looked almost entirely white, missing that part of the pattern entirely. Next, on full 4K resolution 3,840x2,160 resolution test pattern, neither system scaled perfectly. A multiburst pattern, scaled up from its native 1,920x1,080 format, looked a bit softer on the 2013 iMac, its edges not as sharp or as well-defined. Sarah Tew/CNETRunning through several professional test patterns from our arsenal of television testing files, a set of color bars looked completely identical on both displays, while a grayscale pattern was also nearly identical, but with just a hint of green on the 2014 5K iMac. Intel has a new generation of CPUs coming soon, codenamed Broadwell, but those are not expected until early 2015 at the earliest. Nvidia has new 900-series GPUs for both mobile and desktop, but as noted, AMD is the GPU of choice here. What you're not going to find here is the latest generation of internal components. Gaming has never been a big deal on Macs, but that graphics-card muscle is vital for video editing and encoding, as well as CAD and design tasks, and that's one reason people choose a 15-inch MacBook Retina Pro, 27-inch iMac, or Mac Pro desktop, all of which include discrete graphics cards. Apple has jumped between these two GPU brands before, and currently, you'll find AMD in the Mac Pro and new iMac, while Nvidia powers the 15-inch MacBook Pro and the non-5K iMac. That 2013 model used an Nvidia GTX 775M graphics card, but for the 5K panel, Apple has switched (back to) AMD with the R9 290X. The previous 27-inch iMac had a 2,560x,1440 display, making this 2x jump especially impressive. In person, that 5,120x2,880 display is simply stunning, especially when displaying high-res full-screen photos and video. ![]()
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