Maximum of 64GB is possible, 4 slots are available Specification. -- Original Review -- Tried installing them in every slot, iMac 27" would not turn on when installed. Consejos sobre actualizaciones. Apple iMac 27'' Retina 5K Display GHz Quad-Core Intel Core i7 (10/). Returned and trying again with a replacement on. RAM compatible. Slots: 4 (2 banks of 2). Maximum memory: 64GB. Standard memory: 8GB removable. This logic board has an. There are four ram slots on the rear of the logic board which can take up to 32GB of PC (MHz) DDR3 SO-DIMM modules. ¡Buenas noticias! Su ordenador. Los módulos DIMM de la iMac (Retina 5K, 27 pulgadas, ) tienen una muesca en la parte inferior, ligeramente a la izquierda del centro: Los. % ; Memoria Mac. Los plug-ins DIMM del iMac (Retina 5K, 27 pulgadas, ) tienen una muesca en la parte inferior, ligeramente a la izquierda del centro: Los. . A-Tech 32GB (2x16GB) RAM for Apple iMac (27 inch Retina 5K & inch Retina 4K) | DDR4 MHz SODIMM PC 2Rx8 V Pin SO-DIMM Memory Upgrade. Memoria RAM iMac 27" Retina 5K de mediados ; Memoria Mac OWC RAM 8GB SO-DIMM DDR4 MHz · Memoria Mac OWC RAM 8GB SO-DIMM DDR4 MHz.