Please buy a real power supply before your computer ignites in flame, destroying all components.
I'm honestly not joking. That PSU is junk, and is probably capable of like 200W, MAYBE.
Get something that is 80+ BRONZE certified from either Antec, Seasonic, or Corsair(all except builder series). 500W will be enough.
I agree with what you said but can I ask why not builder series? I was going to get a Corsair 650W 80+ Bronze Builder Series and the ratings looked pretty good from what I saw.