The stunning all-in-one iMac features a beautiful 21.5 widescreen display. Fourth-generation quad-core Intel Core processors and superfast NVIDIA graphics make it the most powerful iMac yet. And it comes standard with 8GB memory, a 1TB hard drive, and advanced, high-speed I/O, including two Thunderbolt ports and four USB 3 ports. All in an impossibly thin enclosure that’s only 5 mm at the edge.