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The AMD Athlon is a line of 32-bit microprocessors manufactured by AMD between 199 and 2005. The "Athlon" brand name is continued in other 32-bit and 64-bit processors, such as the Athlon XP, Athlon 64, and Athlon 64 X2.
athlon
Itanium, amd athlon,athlon,pentium
The fastest "classic" Athlon is the Athlon 1400C. The fastest 32-bit Athlon is probably the Athlon XP 3200+.The fastest processor with the Athlon name is probably the AMD Athlon 64 FX-74.
The AMD Athlon 64 supports 64-bit addressing, while the AMD Athlon uses only 32-bit addressing. 64-bit addressing allows the processor to access more than 4 GB of RAM, which is increasingly important as applications become more memory hungry.
Assuming that your question is "what are the characteristics of the AMD Athlon 64FX?": The Athlon 64 was the first 64-bit microprocessor aimed at regular consumers like you and me (as opposed to the Opteron which was AMD's first 64-bit CPU but it was intended to be used in Workstations and Servers). The FX part of the name differentiates it from the Athlon 64 in that it has all of its multipliers unlocked and has a higher clock speed. It was marketed toward gamers.
AMD introduced the Athlon 64 in 2003
The AX1200-B1781A AMD Athlon X2 Dual-Core 4050e comes installed with Windows Vista Home Premium 64-bit.
AMD was the first to produce one (The Athlon 64) and called the Technology AMD64.
If everything else is equal (hard drive speeds, memory size and video card hardware, etc) the AMD 4000+ is quite a bit faster than a Pentuim 4 2.4ghz.
There is no 128-bit edition of Windows.
64-bit processing