HELP:how to calculate proper cpu power?

[vannipule]

hi guys i know that this will look like a stupid question but as im new to amd i have this question to do : my pc is a AMD Athlon(tm) 64 processor 3700+ and 2.2 Ghz right, so what is my cpu? 2.2ghz right,so 3700+ is what?
now what i think is(and if a have it wrong plz answer me)that the 2.2ghz is my cpu and the 3700+ is the biggest cpu i can install on my mobo.and if i wanna put a let say 4.0 ghz cpu i have to change mobo.
i will wait for your feedback pls.
10x ivan-malta