From an AMD press release:
SAN FRANCISCO — September 23, 2003 –AMD (NYSE: AMD) today marked the next frontier in computing, introducing the world’s first and only Windows-compatible 64-bit PC processor – the AMD Athlon™ 64 FX processor – and paving the way for a jaw-dropping PC experience. The AMD Athlon 64 FX processor delivers what no other PC processor can: the highest overall 32-bit performance for today’s demanding applications and the power of 64-bit computing for the next wave of software.
Specifically designed for gamers, PC enthusiasts and digital content creators, the AMD Athlon 64 FX processor is the most technically advanced and highest performing 32-bit and 64-bit PC processor in the world. Systems based on the AMD Athlon 64 FX processor enable a “cinematic computing” experience that is immersive, interactive and provides a new level of realism not available today except from DVD-quality films.
“AMD is taking a lead role in shaping the future of the computing industry by putting the power of AMD64 technology at the fingertips of PC users around the world,” said Hector Ruiz, president and chief executive officer of AMD. “The growing number of people looking for cinema-quality PC performance that transforms imagination into reality can now fully realize their dreams.