In August 1999, Apple announced the first Power Mac G4: 1
The Power Mac G4 is powered by the revolutionary new PowerPC G4 chip architected by Apple, Motorola and IBM, and is the first personal computer in history to deliver supercomputer-level performance of over one billion floating-point operations per second. The Power Mac G4s run professional applications like Adobe’s Photoshop up to twice as fast as 600MHz Pentium III-based PCs.
The G4 chip incorporates a new execution unit named the Velocity Engine — the heart of a supercomputer miniaturized onto a sliver of silicon. In a set of Intel’s own tests published on their web site, the 500MHz G4 chip was 2.94 times as fast as the 600MHz Pentium III processor.