Apple 21.5in iMac

Apple’s iMac is a beautiful example of Apple’s excellence in design and also its brilliance when it comes to engineering. The side of the iMac is just 5mm thick. It takes up very little space on the desk and is incredibly light too.

Apple 21.5in iMac

When it updated the iMac in 2015, Apple added a 4K Retina display to the 21-inch range. This time round there are two 4K Retina iMacs: a 3GHz quad-core model and a 3.4GHz quad-core model.

The resolution is the same as before, at 4,096×2,304 pixels for the 21-inch Retina iMacs. This is a P3 display, as per the 2015 models. A P3 display is capable of producing colours outside the sRGB colour gamut.

The non-Retina 2.3GHz model offers a 1920×1080 sRGB display. The Retina screen is not only brighter, clearer, and with better contrast, more colours can be seen, which is to be expected, but impressive, none the less. 

The new 21-inch iMac features new Intel Kaby Lake processors. The 21in iMac model has Kaby Lake processors running at up to 3.6GHz (which is a build-to-order option). The processor is as follows:

21.5in iMac

  •   2.3GHz i5 dual-core
  •   3.0GHz i5 quad-core
  •   3.4GHz i5 quad-core
  •   3.6GHz i7 quad-core (BTO)

From the Retina display, a dedicated graphics card is included, the Radeon Pro 555 with 2GB video memory, rather than the Intel Iris Plus Graphics 640. 

Intel’s graphics (which are integrated on to the CPU) use the computer’s RAM, while dedicated (or discreet graphics cards) have their own memory.

An integrated card will be quite sufficient for browsing the web, office work, even watching and editing videos. Radeon Pro graphics cards are sufficient for other graphic intensive works.

The 4K iMac will ship with discrete Radeon Pro 555 and 560 4GB VRAM, which is 3x faster than the previous generation, according to Apple. The 21.5-inch model also delivers up to three times faster performance than previously, according to Apple. And, even though the entry-level 21-inch iMac gets an Intel’s Iris Plus integrated graphics, that is still 80 per cent faster than previous generations.

It is also possible to upgrade the RAM. Rather than being soldered onto the motherboard, this time the RAM is located in a RAM hatch hidden behind the logic board. So the RAM can be upgraded.

The fact that these components can be upgraded is a refreshing change, although accessing them will not be easy.

The memory is better too – it’s been upgraded to DDR4 and therefore offers higher clock speeds and lower voltage operations and is faster than the older DDR3 memory.

The standard storage offered in the 21-inch iMacs is as follows:

  •   2.3GHz 1TB hard drive
  •   3.0GHz 1TB hard drive
  •   3.4GHz 1TB Fusion Drive

Learn more about the Apple 21.5in iMac