hey as some of you may know i bought a 7900gt that requires a 450 watt power supply and i have a 350 watt PSU i was looking at all the PSU's on newegg.com but i was wondering if all power supplies are the same and there arent different sizes.
how do i know which one i need for my computer because my computer is also a dell computer and they made it sound like there was no difference but i knew that couldnt be true