fc4 on AMD64 dual core

[Amadeus W. M.]

Just wondering what are people's experiences on dual core AMD64. Is this
architecture fully supported by fc4? Is fc4 stable on this architecture? 
Is fc4 optimized for amd64 x2?

I looked up the recommended motherboards at the AMD web site and all but a
few had an Nvidia chipset (the others VIA). Do I have to worry about
drivers? Do I have to download drivers from Nvidia the way we do for the
Nvidia video cards each time we upgrade the kernel? Which chipset is
natively supported by fc4?

Thanks!