My case is a bit different. I have lots of holes where the screws can be repositioned. That is why I needed suggestions for best airflow. I could put it either way. Seriously.
Well, I put it down like everyone suggest. Got everything installed including my USB wireless adapter. TRDCorolla is back in the house. PC up and running at full power. 500watt power, hehe. I'm going to monitor the temps to see how that extra fan works. So far, I can't tell whether it blows or sucks. I even put my hand underneath it to check. It doesn't matter, anyways. I've got fans all over the place.
Now for my review of this PSU. The power cables are extra long so it OWNS as far as flexibility goes. Doesn't matter how far apart your devices are, it will guarantee to reach. It comes with 2 SATA power connector which I am using for the very first time. I ran off of a 4 pin molex before. It's got two floppy power connectors which I have no idea why. Who uses 2 floppy drives anyways?
The fans are thermal controlled meaning it will adjust to heat. It's too early to make a lot of presumptions so I will attempt burn in process. It's a quiet PSU and lightweight which surprises me for a 500watt unit. The motherboard connector is neat as it is a 24 pin, but the other 4 pin can pop out if your motherboard only takes 20 pin like mine. Then there's the separate 4 pin 12V for the CPU. Lots of connections. Only downside is the length of the cables can get pretty messy if you don't organize it well.
As far as the USB wirless adapter, it's as if I'm using a regular ethernet cable but not. Fast connection as usual. No significant degradation or dropoffs. D-Link once again, proved themselves on being one of the best in manufacturing network devices.