how should I configure my casing

[tiebushan]

okay, thanks guys for the input. guess for now I don't need to worry a lot about temp inside case with my current light build.

 

[coffeejunkee]

You don't need 500W for that, 300W will be plenty.

And all atx psu fans face down, sucking in air blowing it out the back (except some models with small fans using front to back airflow, like Antec EA-380).

 

[BonzaiDuck]

You don't need 500W for that, 300W will be plenty.

And all atx psu fans face down, sucking in air blowing it out the back (except some models with small fans using front to back airflow, like Antec EA-380).

Well, take a look at the PSU mounting holes for ATX cases requiring the PSU to fit in the case-bottom. There are two, opposite diagonal holes for the "odd-ball" screw that violates "rectangularity." Mine is mounted "upside down" as I said . . .