Is it possible to add PCIe based SSD to base iMac retina?
Theoretically, yes.
Realistically, no. Anything outside of changing RAM will void the computer's warranty.
And in the real world the utility of doing an internal flash swap over external solutions seems rather minimal.
Internal flash drives on the iMac retina run at about 1.8 times the speed of external thunderbolt SATA3 SSDs. Being able to replace the Apple flash with a 3rd-party unit of larger capacity down the track would be a bonus no?
Internal flash drives on the iMac retina run at about 1.8 times the speed of external thunderbolt SATA3 SSDs. Being able to replace the Apple flash with a 3rd-party unit of larger capacity down the track would be a bonus no?