The Power Macintosh G3, commonly called 'beige G3s' or 'platinum G3s' for the color of their cases, is a series of personal computers designed, manufactured, and sold by Apple Computer from November 1997 to January 1999. It was the first Macintosh to use the PowerPC G3 microprocessor, and replaced a number of earlier Power Macintosh models, in particular the 7300, 8600 and 9600 models. It was succeeded by the Power Macintosh G3. The introduction of the Desktop and Minitower G3 models. The Power Mac G3 introduced a fast and large Level 2 backside cache to Apple's product line up, running at half processor speed.