World's First 64-bit Processor in a PC?
Apple also claims that the G5 is the world's first PC with a 64-bit processor (the exact claim is, "The Power Mac G5 is the world's fastest personal computer and the first with a 64-bit processor").
However, according to AMD's 22 April 2003 press release, AMD introduced the AMD Opteron processor, which is a 64-bit processor. That is 2 months earlier than Apple's announcement of the G5.
Also, the Sun SPARC computers, which have been around for years, had 64-bit processors, although Apple would say that they are not "personal computers", despite the fact that you can buy an old one very cheaply. The DEC Alpha processors were also 64-bit.