Thanks for the links! now i got me some reading to do.
Also for a psu, is it safe to say hypothetically if my components only need say 300w and i decide to get a 650w psu, will that be safe?
So far i havent seen anything to say its bad. I just think its kinda like car horsepower, i could have 500hp but on a normal day i only have to use a fraction of that.