I am happy to give my specs but I have a good idea about how much power/current I need. What I don't know is which are a good physical match with the length of cables for a P180 - why did they put the PSU at the bottom?
- It allows for the top fan for the main chamber ... an excellent idea for heat dissipation.
- A front vent is required for the independent PSU/hard drive chamber to isolate its heat from the main chamber. If this vent was at the top, the front bays would have to be lowered from the preferred top of the case. (a matter of opinion, of course)
- There is probably some reduction of noise from it being mounted low rather than high, fitting with the other sound-dampening features of the case.