I av heard from a friend and i got really worried that AMD proccecors run at 80 degrees and cause i am buying a new com and puttin on an amd i am really worries does anyone know if thats true?

Its not true, look at my post in your other thread.

The old socketA Athlon thunderbird processors where OK up to 95c actually. But the newer CPUs don't run that high. What AMD processor are you looking at, and are you talking Celcius or Fehrenheit?

I am looking for an AMD 64 3800+ Dual Core Am2 is it gd?

Depends what you mean by "good", but in general yes it is a very good cpu. But it should not get up to 80c. They do run a little hot though (I think their max temp is about 70c but still you don't want to be anywhere near this temp).