Quote Originally Posted by Leo_Hart View Post
I see because my casing instruction was tell me facing down, so i guess if facing up would be better cooling. Thanks for the details.
Yea I would recommend the air intake facing up on a bottom mounted PSU.
It helps take any warmer air out of the case, as an added bonus when you do that and should improve circulation.
I think your PSU manufacturer, was assuming your case would have a top mounted PSU.

Quote Originally Posted by Rockababy View Post
Pre-ordered the 900D =] the PSU air intake is from the side no to mention you can dual PSU. I would say it's the best case upgrade (well it is...) as long as you have the space.
Nice, that should last you a very long time.