Apple has revealed its updated iMac with fourth-generation Intel quad-core processors, new graphics, next-generation Wi-Fi and faster PCIe flash storage options. The entry-level 21.5-inch iMac features a 2.7 GHz quad-core Intel Core i5 processor and new Iris Pro graphics. The high-end 21.5-inch model and both 27-inch models feature quad-core Intel Core i5 processors up to 3.4 GHz and NVIDIA GeForce 700 series graphics with twice the video memory and up to 40 percent faster performance than the previous generation. Customers have the option to upgrade to quad-core Intel Core i7 processors up to 3.5 GHz and NVIDIA GeForce GTX 780M series graphics with up to 4GB of video memory, perfect for graphics-intensive tasks. The new iMacs can be configured with a 1TB or 3TB Fusion Drive, and all-flash storage options are now available in configurations up to 1TB. Available today through the Apple Online Store, Apple’s retail stores and select Apple Authorised Resellers; the revamped iMac retails at £1,149-£1,749 / $1299-1999 depending on configuration.