FreeBSD platform for "AMD Sempron 64 2600 (socket 754, Palermo) Box" ?

[Petr Karasek]

Dear ...,
I would like to ask you 
to which platform belong this processor "AMD Sempron 64 2600 (socket 754, Palermo) Box" ?

Is this the 
		FreeBSD/amd64 Platform 
	or
		FreeBSD/i386 Platform  
	???

So which installation should I use when I own a computer with this processor ?

Thanks you very much     Petr

PS: Sorry, I cannot find it in documentation.