for a 550w the amps are what you would find on a very low quality generic psu
i posted links earlier for you to compare i am dammed if i know where the post has gone
for a 550w you need to look at something like this
http://www.newegg.com/Product/Produc...corsair%2b550w
it puts out 41a on the 12v line
probably costs an arm and a leg in your part of the world