The new memory is the faster DDR3 variety-an upgrade over the DDR2 SDRAM that shipped in the previous models. Apple also offers a 7,200 rpm drive and solid-state drive (SSD) as built to order options. The 2.53GHz model comes with 6MB of shared L2 cache, 4GB of memory, and a 320GB hard drive (5,400 rpm). The 2.4GHz model comes with 3MB of shared L2 cache, 2GB of 1,066MHz DDR3 memory, and a 250GB SATA hard drive (5,400 rpm). The new MacBook Pro is slimmer than its predecessor. Even without a clasp, it feels secure when closed. There’s no clasp keeping the lid shut: simply grip the thumbscoop etched into the bottom of the case, and it opens right up. With the new MacBook Pro in hand, it feels almost like an extension of your arm. Such assembly, according to Apple, eliminates the need for fine-tuning parts and diminishes the possibility of construction failures. Instead of assembling the laptops piecemeal and expertly splicing the components together, the new models sport a unibody architecture that constructs the entire machine out of a single piece of recyclable aluminum. Previous Macbook Pros felt rock solid, the new models seem even more so due to the brand new manufacturing process introduced with this generation of MacBook Pro 15-inch models-with speeds of 2.4GHz and 2.53GHz-have been remodeled, redesigned, and reengineered for a completely new laptop experience. At casual glance it appears nearly identical to its predecessor, but it’s not.
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