Apple has introduced new iMac models that feature new dual-core Intel Core i3, i5 and i7 processors, in 21.5 and 27-inch configurations ranging from $1,199 to $1,999.

The iMac retains its familiar aluminum-clad all-in-one design. Inside are new processors mated to an integrated memory controller that uses faster 1333 MHz memory. All iMac displays utilize IPS technology, which Apple says provides a 178-degree viewing angle. The iMacs also sport SD card slots to accommodate digital cameras and other portable devices that use the SD card slot for storage. The slot handles the SDXC format, a new higher-capacity SD format that provides storage up to 2TB on a single card.

The 21.5-inch iMac, equipped with a 1920 x 1080 display, starts at $1,199 and comes equipped with 3.06GHz Intel Core i3 processor, 4GB RAM expandable to 16GB, ATI Radeon HD 4670 graphics with 256MB SDRAM, 500GB SATA hard drive, 8x SuperDrive, Mini DisplayPort, AirPort Extreme 802.11n, iSight, Gigabit Ethernet, four USB 2.0 ports, SDXC slot, one FireWire 800 port, built-in stereo speakers and microphone, Wireless Apple Keyboard and Magic Mouse.

The $1,499 model features a 3.20GHz Intel Core i3 processor, ATI Radeon HD 5670 graphics with 512MB SDRAM and 1TB hard drive.

Configure-to-order options include a 3.6GHz Intel Core i5 processor, 2TB hard drive and up to 8GB RAM.

The 27-inch model starts at $1,699, and comes with a 2560 x 1440 display, 3.20GHz Intel Core i3 processor, ATI Radeon HD 5670 graphics with 512MB RAM and 1TB hard drive. The $1,999 model features a 2.8GHz quad-core Intel Core i5 processor, 4GB RAM, ATI Radeon HD 5750 graphics and 1TB hard disk.

Configure-to-order options include a 2.93GHz quad-core i7 processor, 2TB hard drive, 256GB SSD, and up to 16GB RAM.