Adding RAM to an iMAC Mid-2011-27"
My iMac still has the original 2GB of RAM in the top two slots. Can I replace those top-slot RAMs with new 4GB RAM DIMMS at the same time I add two 4GB DIMMS to the now open bottom slots? Or can I only add the 8GB of new RAM to the bottom slots.
Thanks
iMac 27", macOS 10.13