You can take a look at the Geekbench 3 and Cinebench benchmark charts here. Also included are numbers from the $2299 Retina 5K iMac, the quad-core and six-core Mac Pro, the standard 27-inch iMac, and more.
The iMac with Retina 5K display is one of the most impressive desktop computers to come from Apple, and now there are two models from which to choose. The $1999 Retina 5K iMac is the better choice as an everyday computer for typical users — you probably won't notice the performance hit from the hard drive when using the Internet, working in productivity apps, putting together a short home video, or organizing the pictures you took for the day. Professionals and power users looking for a production machine to handle long video renders, high-detail photography, audio, and more should opt for the $2299 model with its Fusion Drive.
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