Power Macintosh 6500 (1995)
The Power Macintosh 6400 (Codenames: "InstaTower", "Alchemy", "Hacksaw"; also sold under variations of the name Performa 6400) is a mid-range personal computer that is a part of Apple Computer's Power Macintosh and Macintosh Performa series of Macintosh computers. The two Performa variants were introduced in August 1996, while the Power Macintosh variant arrived two months later. They were discontinued in favor of the uniformly named Power Macintosh 6500 in August 1997, ending the Performa brand.
via Wikipedia: http://en.wikipedia.org/wiki/Power_Macintosh_6400_series