The Apple iMac Logic Board 27" 2014 A1419 with EMC 2806 is a motherboard designed for iMac models with a 27-inch Retina 5K display. It features a Core i5 CPU running at 3.3GHz, 4 memory slots compatible with DDR3 SDRAM, and a Radeon R9 M290 2G GPU. This motherboard is most suitable for casual computing and comes with input/output ports such as Ethernet and USB 2.0. Designed by Apple, this logic board is a reliable choice for those looking to upgrade or replace parts on their iMac.