History: Announced in January 2001, the PowerBook G4 was a dramatic change to Apple's PowerBook line. Based on a new low-power G4 chip, the PPC 7410, the PB G4 sported a stylish new Titanium enclosure, which was only 1" thick. The reduction in size came at a price, however: the PB G4 had a fixed, 6x slot-load DVD-ROM drive instead of a removable drive bay, and a single battery bay. The most innovative feature of the PB G4, was its wide-aspect 15.2" screen, which had a native resolution of 1152x768. The PB G4 shipped in two configurations. The 400 MHz model, with 128 MB of RAM and a 10GB hard drive was $2,599 U.S. and the 500 MHz model, with 256 MB of RAM and a 20GB hard drive was $3,499 U.S.