Are all PSU's fans on the bottom?

[Jgranger]

My Antec 900's PSU slot is on the bottom so it feels like a waste with the PSU's fan not really doing much on the bottom. Is there any way to deal with this? I'm about to buy a new PSU and figured I should ask

 

[hunter315]

The PSU slot is symmetrical, the easiest solution to this problem, flip the PSU over so the fan is on top. The screw holes on the back are designed to allow for it to be screwed in in either orientation.

 

[jsc]

Yes. The Antec 900 case has two sets of PSU mounting holes. You should mount the PSU so the fan faces the inside of the case.

I mounted the the PSU with the fan up and hard drives in the lower drive bay - gives me excellent drive temps. The fan in the middle drive bay blows straight into the video card. I have my CPU heatsinks oriented vertically to take advantage of the large fan on top.

I figure that warm air wants to rise. Why fight physics.

 

[delluser1]

You should mount the PSU so the fan faces the inside of the case.

I figure that warm air wants to rise. Why fight physics.

I'm confused

 

[shovenose]

me too i done see what the heck si going on here. doesnt the fan on the "bottom" of the psu suck air push air from inside the case through the psu, then to the outside. thats what the fan on my ULTRA 550w does

 

[jsc]

I wrote:
"Yes. The Antec 900 case has two sets of PSU mounting holes. You should mount the PSU so the fan faces the inside of the case.

I mounted the the PSU with the fan up and hard drives in the lower drive bay - gives me excellent drive temps. The fan in the middle drive bay blows straight into the video card. I have my CPU heatsinks oriented vertically to take advantage of the large fan on top.

I figure that warm air wants to rise. Why fight physics."

Maybe I wasn't clear enough and I should have written:
"Yes. The Antec 900 case has two sets of PSU mounting holes. You should mount the PSU so the fan faces the inside of the case.

I mounted the the PSU with the fan up and hard drives in the lower drive bay - gives me excellent drive temps. The fan in the middle drive bay blows straight into the video card.

I have my CPU heatsinks oriented vertically to take advantage of the large fan on top. I figure that warm air wants to rise. Why fight physics."

As opposed to pointing the CPU HSF toward the back of the case as is common.