Does someone can tell me what the meaning of Supported Architectures? And the difference between 386, 486, 586, 686, AMD x86-64?
I wanna download one Live-Cd but I don't know the right one!
Problably I will put the Linux in my HD.... Supported Architectures could interfere in this installation?
Thanks!

What processor have you got? What linux CD do you want to download? Depending on the architecture of your CPU you need to choose the right CD.

if yours is a 64-bit computer then get AMD x86-64 (also for intel 64-bit) else

for 32-bit any of the rest would be OK.

(32-bit will be OK on 64-bit systems)

My processor is AMD Sepron 2.8!
I wanna donwload the Live-cd Of Mandriva and Fedora!

386, 486, 586, 686 are essentially the same thing; they are just different generations of the basic x86 CPU. On a modern CPU you would be using i686 binaries, but you could run any of them. Each generation had a few more tweaks and performance capabilities, and using the architecture that matches with your CPU (or at least, the closest one) theoretically gives you better performance.

x86-64 would be a 64 bit processor. If you have a 64 bit machine and use a 64 bit operating system, you will get the best performance possible. You can still use older 32 bit software on a 64 bit machine, but you would not be using the hardware to it's strengths.

Do you know what processor is in your computer? Or at least the brand/model?

My processor is AMD Sepron 2.8!
I wanna donwload the Live-cd Of Mandriva and Fedora

OK get the x86-64 versions (Fedora 10)

You can try Kubuntu too

does my processor is 64 bits?

I don't think so

http://www.techwarelabs.com/reviews/processors/sempron/

Go for 32 bit versions.

MS3FGX told that x86-64 is for processor that is 64 bit!And the mine is not!
Is that really correct?

So I can download 386, 486, 586, 686, right?

Some semprons are capable of 64 bits. Some aren't.

If you are not sure about yours you can do two things: provide us with the contents of /proc/cpuinfo, or the easiest way (provided you have a fast connection), download a 64 bits livecd. If it boots, then your cpu can run x86_64 code. If it halts with a message telling you something about invalid instructions, then you can't 64 bits code.

Thank you very much!!!