I replaced my 2015 iMac with a 2013 Mac Pro and 4k monitor. I also upgraded the CPU in the Mac Pro. : r/macsetups
Cpu Upgrade Imac Mid 2015 - Apple Community
iMac 27" A1419 Late 2015 Logic Board -2GB AMD Radeon R9 M380 GPU *NO C - Part Haven
iMac 27" A1419 Late 2015 Logic Board W/ 2GB AMD Radeon R9 M390 GPU *NO CPU* | eBay
Success: Upgraded my Late 2015 iMac from i5 6500 to i7 6700k : r/mac
Upgrade your iMac with OWC, 2017 4K Retina Edition
iMac 5K - 4790K, M295X - thermal compound + second SSD upgrade + Air Vents MOD | MacRumors Forums
Logic Board w/ CPU - iMac 21.5″ A1418 (Late 2015 4K)
Apple's 4K 21.5-Inch iMac Allows You to Upgrade RAM and CPU – Company Finally Dialing Down on Soldered Components, Reveals Teardown
Apple's 4K 21.5-Inch iMac Allows You to Upgrade RAM and CPU – Company Finally Dialing Down on Soldered Components, Reveals Teardown
iMac Intel 27" Retina 5K Display CPU Replacement - iFixit Repair Guide
iMac 27" A1419 Late 2015 Logic Board W/ 4GB AMD Radeon R9 M395X GPU *N - Part Haven
iMac 5k 27'' CPU Upgrade - YouTube
Upgrade iMac Intel Core i3 CPU to Core i7 - iFixit Repair Guide
iMac Intel 21.5" Retina 4K Display (2017) CPU Replacement - iFixit Repair Guide
Logic Board w/ CPU, GPU, Heatsink - iMac 27″ A1419 (Late 2015)
iMac A1419 (27-inch Retina 5K) Upgrade CPU Core i5 to Core i7 - YouTube
Apple iMac with 4K Retina display (21.5-inch, 2015) review: Apple packs more pixels into its smallest iMac - CNET
A-Tech 32GB (4x8GB) RAM for Apple iMac Late 2015 27 inch Retina 5K | DDR3L 1866MHz / 1867MHz PC3L-14900 1.35V 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
Teardown of new 21.5-inch iMac surprisingly reveals user-upgradable RAM, modular CPU - 9to5Mac
Stayin' Alive: Upgrading the CPU, Hard Drive, and RAM on a 2006 iMac
Apple iMac review (21.5-inch, 2015): 4K is optional, faster hard drives shouldn't be | Engadget
