well will that one fit a graphics card that will work for smooth gaming?
That's correct.
well will that one fit a graphics card that will work for smooth gaming?
Yes, they will.
Most of them are non-modular, except the Corsair 520HX. Didn't know whether or not, you wanted modular or non.
I'm sorry for my ignorance, but what is a modular and non modular power supply?