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.

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 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.

64-bit processing

64-bit processing