MacBook Pro is built on the revolutionary Intel Core 2 Duo which packs the power of two processor cores (up to 2.4GHz) inside a single chip. Mac book provides 4MB of Smart Cache, L2 cache that can be shared between the cores as needed. It delivers higher performance in 2D and 3D graphics, video editing, and music encoding. But the faster engine is only part of the story. MacBook Pro delivers up to 4GB of 667MHz DDR2 memory with a faster, 800MHz frontside bus and support for hard drives up to 250GB. Ultimate speed, performance, and connectivity.