How much RAM Memory
I have a iMac (Retina 5K, 27-inch, 2017) with 8GB internal RAM. I now wish to upgrade my RAM, do I need to duplicate what is onboard already, e.g. 2x4 GB which will give me 16GB in total or can I add 2x8 GB making 24GB in total.
Thanks, hope I have explained it okay
Graham