Apple issued a press release that it’s now selling iMacs with upgraded processors.

Apple Updates iMac
CUPERTINO, California—September 24, 2013—Apple® today updated iMac® with fourth generation Intel quad-core processors, new graphics, next generation Wi-Fi and faster PCIe flash storage options. The updated iMac brings the latest technology to the stunningly thin design and gorgeous display of the world’s leading all-in-one desktop.

The iMac still comes with a 21.5-inch or 27-inch screen. The entry-level 21.5-inch model has a 2.7GHz quad-core Intel Core i5 processor with Iris Pro graphics. The 27-inch model also comes with a quad-core Core i5 and Nvidia GeForce 700 series card. Apple claims that the new models have “twice the video memory and 40 percent faster performance” than last year’s iMacs. Intel Core i7 processors up to 3.5GHz and fancy GeForce GTX 780M graphics cards with 4GB of video memory are also available. RAM starts at 8GB but can be upgraded to 32GB.