Apple MB535LL/A Mac Desktop

Enter the Quad-Core Intel Xeon “Nehalem processor. Its single-die, 64-bit architecture makes 8MB of fully shared L3 cache readily available to each of the four processor cores. The result is fast access to cache data and greater application performance. Combine that with the other technological advances and you get a Mac Pro that's up to 1.9x faster than the previous generation. All-new high-performance graphics cards from NVIDIA make Mac Pro graphics technology faster than before. Perfect for motion graphics, 3D modeling, rendering, or animation, the NVIDIA GeForce GT 120 with 512MB of GDDR3 memory comes standard — and provides up to 2.9x the performance of previous Mac Pro standard graphics cards. The Mac Pro also has four 3.5-inch internal hard drive bays that allows for an enormous amount of internal storage, up to 4TB. These bays are direct-attach and cable free, just attach the drive carrier to a Serial ATA hard drive and slide the drive into place. Install more memory in your Mac Pro in a snap. Liter

The new Mac Pro introduces Turbo Boost: a dynamic performance technology that automatically boosts the processor clock speed based on workload. If you re using an application that doesn t need every core, Turbo Boost shuts off the idle cores while simultaneously increasing the speed of the active ones.