Son 4 horas conectado y 5 mensajes para poder escribir en los otros foros.

I'm newbie like you, but for everything I read in the wiki and the Mining board, memory and cpu doesn't matter a lot.

https://en.bitcoin.it/wiki/Mining_rig

I can see that every Rig in the wiki have 2GB or more, but there are a lot of Rigs with 1 GB in the board. Is more important that you only uses a single slot to save some Watts.

Thanks for the review 

And remember that is more and more difficult after some days, so an acceptable hashrate today would be less acceptable the next month.

You must enter in the newbie subforum and post some messages there if you want to write in the others subforums.
http://forum.bitcoin.org/index.php?topic=15958.0

I don't know why the Spanish subforum are an exception, but it seems to be an admin error.