Apple iMac 21" 2.5GHz i5 (MC309LLA)

With new processors and advanced graphics, the new iMac is the fastest, most powerful iMac yet. It's fast enough to handle any modern Digital Audio Workstation software could you want to run.

New Intel Core i5 processor.
Up to 1.7x faster at the core.
New quad-core Intel Core i5 processors are standard on the new iMac. That means the new iMac performs nearly twice as fast as the previous generation, adding a new dimension of speed to everything you do. And since Mac OS X is designed to take advantage of each core, it captures every last bit of performance from the processor.

Turbo Boost 2.0.
Say you'e using a processor-intensive application like Aperture 3 or Final Cut Pro that benefits from extra power. Turbo Boost 2.0 automatically increases the speed of the active cores ” up to 3.8GHz. And by shifting core frequency in small increments, Turbo Boost allows the processor to manage performance without sacrificing efficiency. All this takes place behind the scenes, so your work (or play) goes smoother and faster.

Faster single-chip micro-architecture.
Watching a movie, updating your blog, editing photos. Tasks like these require data to travel from place to place. The latest Intel Core architecture puts the processor, cache, memory controller, and graphics engine on a single chip. Since data doesn™t have as far to travel, you get faster performance and greater efficiency.

Integrated memory controller.
With faster access to memory, each core gets right to work on your data, rather than waiting for it to arrive. That' why Intel Core architecture uses an integrated memory controller to connect fast 1333MHz memory directly to the processor. Together, that helps your applications run at peak performance.

Advanced AMD Radeon HD graphics.
When you need performance for things like playing 3D games, editing HD video, or running design software, the discrete AMD Radeon HD graphics in iMac go to work. You see more frames per second and experience better responsiveness. You'e guaranteed superior graphics performance.

Thunderbolt.
Data transfer is now lightning fast.
Thunderbolt technology has arrived ” and Apple computers are the first to have it. With one tiny port, you get lightning-fast transfer speeds and huge expansion capabilities. Two 10-Gbps data channels per port mean you can transfer data up to 12 times faster than with FireWire 800. And don™t worry about a single drive or peripheral tying up the Thunderbolt port: You can daisy-chain as many as six devices plus a display.