Faster than ever, PowerBook G4 computers all feature PowerPC G4 processors with Velocity Engine that provide robust performance for complex multimedia or data intensive applications. The 15-inch and 17-inch models boast processor speeds of up to 1.5GHz, and the 12-inch model now offers speedier performance with its 1.33GHz processor and new 167MHz system bus. Working with several RAM-hungry applications? The 17-inch PowerBook G4 ships with 512MB of fast DDR memory. And if you're feeling expansive, you can quadruple that to 2GB on both the 17- and 15-inch models. Despite its diminutive size, the 12-inch model still allows you to pack up to 1.25GB of RAM, more than enough to store an entire graphics project in main memory for fast image manipulations.