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It is possible that if you didn’t see the Retina display model you would be more than satisfied with the standard display on the entry-level iMac.We have seen both models, side-by-side, and we have to say, the Retina screen is not only brighter, clearer, and with better contrast, we could also see more colours, which is to be expected, but impressive, non the less.
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The non-Retina 2.3GHz model offers a 1920×1080 sRGB display. A P3 display is capable of producing colours outside the sRGB colour gamut.
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This is a P3 display, as per the 2015 models. The resolution is the same as before, at 4,096×2,304 pixels for the 21-inch Retina iMacs. This time round there are two 4K Retina iMacs: a 3GHz quad-core model and a 3.4GHz quad-core model. When it updated the iMac in 2015, Apple added a 4K Retina display to the 21-inch range. The 21.5-inch model is incredibly light too, not that you will be carrying it around. It will take up very little space on your desk: the foot that forms the base of the arm that the iMac is hinged on measures just 160 x 175mm, which is less than a Mac mini. Sure it bulges as you get to the middle, but not significantly (and let’s face it we need that space for all the lovely components on the inside). Apple’s iMac is a beautiful example of Apple’s excellence in design and also its brilliance when it comes to engineering. If you are new to the iMac though, you are in for a treat. As we will discuss later in this review, the 4K Retina display has been overhauled, and as a result it is better than ever. While the design of the iMac hasn’t actually changed since 2012, there are some visible differences, at least for the 3.4GHz Retina model.