CPU how to buy?

AMD Athlon ™ 64 X2 Dual Core CPU 5000 +), which in English, said the number of what? CPU selection here depends on what the English, the figures.

AMD Inc.:Advanced Micro Electronics
Athlon Series:Athlon
64 out that the support 64-bit systems is that
X2 Dual-Core
Dual-dual
Core-core
5000 + is a specific number