Thoughts on the M4 iMac, and making peace with the death of the 27-inch model
The M4 iMac is a nice computer. Apple's addition of 16GB RAM to the basic $1,299 model makes it a whole lot more appealing ...
MacStories5y
The Case of the Late-2012 iMacs
The thin iMacs didn’t have any room for that, so Apple added a memory access door to the back of the machine, but only on the 27-inch models, as noted by this support article: Memory is not removable ...
ExtremeTech10y
Analyzing the iMac 5K Retina display: How do you get 5K @ 60Hz from a last-gen GPU? (updated)
Original story: A late-2014 display hooked to an early 2012 GPU The GPU powering the 27-inch iMac with Retina 5K display is the R9 M290X, with the R9 M295X offered as an optional upgrade.