2x 4GB or 1x 4GB

[Los Tre]

I have windows 7 32 bit...I have a single ram http://img6a.flixcart.com//image/ram/w/z/w/corsair-cmv4gx3m1a1333c9-400x400-imad6yzuzdqpwceh.jpeg this one....I heard that as many rams are at the system the more faster the pc goes but when i open the properties at "My computer" it tells me 3.25 GB for use only...So i wana know if i add a 2nd RAM like the one i linked it will make my system faster or it will be waste of money?

 

[Eduello]

32-bit operating system can't really use more than 4GB of memory; Adding RAM won't help if your operating system can't read it.
Also, watch this video, it might help (more RAM doesn't mean your PC performs better): https://www.youtube.com/watch?v=0FL_TextgAQ