The day now I found an article to assemble a computer from scratch, the article seems to me very complete and very good to build your own machine.
Here they leave the entrance to the look and learn if you do not know how to assemble a PC.

I had to upgrade my computer because I could not play Call of Duty 4 (COD4), people who recently bought a computer and one or two years old are with the need to upgrade your hardware more memory or video card Since the last games that are not leaving the [...]

Now I have to do a job lol, since Sunday, I bring 11 computers to see them xD, of the 11 machines 6 does not serve, different parties did not serve so I had to disarm them and see what was used and that no, I was with several pieces for my xD, 4 video cards, [...]