marwumpus :
Does anyone know a ITX psu that is 6 inches long and 6 inches wide and 3 inches tall? It has to be compatible with the inspiron 660s, like wire compatible and stuff, please be sure with your answer
Now I am about to question you! According to your measurements you are looking for regular ATX PSU.
First let me show you Inspiron 660s with measurements
Look at upper left corner picture and measurement - it says there 3.94" wide, are you saying that your actual power supply is wider than the case?! This is exactly what you are saying man!
Now take a look at next picture and tell us which one is your form factor!
Above is not 660 but 545 family, but the idea is there.
So? Which one is yours?
And I am sure with my answer! Not sure about your PC describe it first, S stands for slim, not small.
As of now any standard ATX power supply will fit Inspiron 660 MT,
this is general list to follow http://www.eggxpert.com/forums/thread/323050.aspx