GPU: Radeon R9 M290 graphics with 2 GB memory, supports up to 3840 x 2160 on external display.RAM: 8 GB (2 x 4 GB) of 1600 MHz DDR3 memory, 4 SO-DIMM slots, expandable to 16 GB or 32 GB.CPU: 3.3 GHz (3.7 GHz Turbo Boost) quad-core Intel Core i5.Want to buy a 21″ or 27″ iMac? See the best online deals.The 3.3 GHz model can also be ordered with AMD Radeon R9 M395X graphics. Options include Magic Trackpad 2, up to 32 GB of memory, 1-3 TB Fusion Drives, and 256 GB to 1 TB SSDs. The Late 2015 iMac also ships with the new Magic Keyboard and Magic Mouse 2 plus a Lightning to USB cable to charge them. For now, only some Apple apps support 30-bit color, but that will change over time. This is a big step forward from 24-bit color (8 bits each for red, green, and blue) in providing improved color gradation without banding. With OS X 10.11 El Capitan, all Retina iMacs support a new 30-bit color mode with 10 bits per color channel. Hence the 5K Retina iMac with twice the vertical and horizontal resolution of the discontinued non-Retina 27″ iMac. Apple took the 27″ Retina 5K iMac a step further with fifth generation Intel processor technology, state of the art AMD graphics, an even better Retina display with 25% greater color gamut – and at $500 less than the Late 2014 Retina iMac retailed for a year ago.Īs we said then, 4K resolution (4096 x 2160 pixels) is the extra high definition of the future, and to properly edit 4K video, you need a display that has room for all the controls a video editor needs.
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