See the MPG review of the 2017 iMac 5K.
How much does adequate memory matter? A lot. Ordered with 8GB memory, the about $3099 4.2 GHz 2017 iMac 5K felt sluggish doing all sorts of things. It’s just not enough for any serious use, although web browsing and email are fine.
The solution is the OWC 64GB memory kit (or the OWC 32GB memory kit). Easily installed by anyone in a few minutes via the rear hatch with no tools, install, boot up and enjoy the snappy behavior! But it gets better: save $760 versus what Apple charges.
But how much faster is it, with Photoshop? MPG set out to see how the extra memory matters for relatively undemanding Photoshop work (in terms of file size) up to huge jobs.