27-inch iMac with Retina 5K display (2017) review:
After more than a year of waiting, the new 5K iMac is an improvement over the 2015 model in almost every way. Its new Kaby Lake processor is fast; the screen is even brighter; and it has faster memory, a more powerful AMD graphics chip and two Thunderbolt 3 (USB Type-C) ports for faster transfers.
There’s so much to like about the new iMac, but its £1,749 price tag might put off a few consumers. It is expensive, but there isn’t anything else quite like the 27-inch iMac with Retina 5K. It looks stunning with and without the screen switched on and the new hardware inside peps up performance nicely. The best all-in-one PC just got better.
27-inch iMac Design :
The iMac design has stayed relatively unchanged since the slim version was introduced back in 2012. With the 2017 update, you get the familiar minimalist design, with a 27-inch display surrounded by black bezels and covered in edge-to-edge glass. Below the display is the bare-metal chin bearing the Apple logo, and a sturdy L-shaped stand raises the whole thing a few inches off of the desk. The hinged stand gives you a reasonable amount of tilt adjustment, but there’s still no good way to adjust the height, other than stacking the iMac on some books.
The iMac measures 20.3 x 25.6 x 8 inches and weighs 20.8 pounds, which is quite reasonable for an all-in-one desktop. In comparison, the Asus Zen AiO Pro Z240IE is 23 x 17.1 x 7.5 inches and 16 pounds, and the Dell XPS 27 is 24.6 x 17 x 3.16 inches and 38.2 pounds.
On the back, the iMac has a gently curved chassis, with airflow vents and an internal access panel hidden behind the stand. On the left side of the machine, toward the lower-left corner, is a power button, and on the lower right is the iMac’s collection of ports and connectors.
27-inch iMac Performance :
Apple has upgraded the internals to Intel’s latest Kaby Lake processors. My review sample comes with a 3.4GHz, quad-core Intel Core i5-7500 CPU and 8GB of RAM (upgradeable to 16GB, 32GB or 64GB).
The iMac achieves a 4,803 single-core and a 13,640 multi-core score in Geekbench 4, that’s much faster than the 13in Apple MacBook Pro 3.1GHz Intel Core i5-7267U (Kaby Lake), which manages a 4,365 and 9,223 score respectively.
In the Expert Reviews 4K benchmarks, the 2017 5K iMac achieved an overall score of 109, a 9% improvement on the 2015 model. Retrospectively, the 2015 iMac scored 100 overall, roughly 10% quicker than the 2014 Haswell model, which scored 91. That’s in line with the speed boost we’ve seen moving from previous-generation Haswell chips to Skylake, and Skylake chips to Kaby Lake.