History: Apple's solution to having had 4 products named the PowerBook G3, was to drop the G3 altogether. The PowerBook (FireWire) finally brought the "Unified Motherboard Architecture" (UMA) to the professional PowerBook line. The PowerBook (FireWire) finally replaced the SCSI port, with dual 400 MBit/s FireWire ports. Its bus speed was upped to 100MHz, and it included an AGP-based ATI Rage 128 graphics chipset, and a 6X DVD-ROM drive. The PowerBook G3 (FireWire) came in two configurations: the 400 MHz/64MB/6GB model was initially sold for $2,499 U.S., and the 500 MHz/128MB/12GB model was $3,499 U.S. In September 2000 the hard drive sizes were increased to 10 and 20 GB, respectively.