 It also has 802.11ac Wi-Fi, which is capable of reaching speeds up to 1300Mbit/s and PCIe-based flash storage, offering up to 1.5× the performance of previous-generation (Ivy Bridge) iMacs.This applies to both the Fusion Drive and pure-SSD options.These became the last iMacs to offer Target Display Mode, as the Retina line introduced the following year are incompatible with the feature due to resolution differences.