DESC: Viking's mission is to create products that enhance the speed, power and performance of IT systems, thereby increasing their value to the user. Viking's current offering includes over 2000 different memory, modem and flash memory products that present the fastest, most cost-effective means of expanding the capabilities of a computer or a digital device.??This memory is designed for the following systems: ??Apple Computer PowerBook G4 1GHz 17" Screen (DDR333).??For a complete compatibility list please refer to the original manufacturer's web site.