From Apple’s press release:
Apple today updated its all-in-one iMac® line, widely praised as the world’s best desktop computers, with the latest Intel Core i3, Core i5 and Core i7 processors and powerful new graphics. Starting at $1,199, the new iMac line is the fastest ever with dual-core processor speeds up to 3.6 GHz, quad-core speeds up to 2.93 GHz and discrete graphics including the powerful ATI Radeon HD 5750. The new Magic Trackpad, with a smooth glass and aluminum design, gives iMac users the same intuitive Multi-Touch™ gestures that Mac® notebook customers have come to love and is available separately for $69.
“We took the world’s best all-in-one and made it even better,” said Philip Schiller, Apple’s senior vice president of Worldwide Product Marketing. “With the latest processors, high-performance graphics and signature aluminum and glass design, customers are going to love the latest iMac.”
Dual-core Intel Core i3 and Core i5, and quad-core Core i5 and Core i7 processors set a new benchmark for iMac performance. The processors feature an integrated memory controller to access the system memory directly, allowing the new iMac to take full advantage of its faster 1333 MHz memory. New discrete ATI Radeon HD processors deliver incredibly smooth, crisp graphics for the most demanding 3D games, creative software and technical applications. iMac displays feature IPS technology to deliver a brilliant image across a wide 178 degree viewing angle. The SD card slot on the iMac now supports the SDXC format to handle the latest high-capacity storage cards. Customers of the 27-inch iMac have the option to order a 256GB solid state drive (SSD) as a primary or secondary drive. The iMac SSD supports up to 215 MB/s data transfer rates for faster startup and application launch times.