Should i put the psu fan facing up or down?

[computernoob29]

im building a new rig soon with an xfx pro xxx 750w and a nzxt phantom 410 and i dont know if i should mount it upside down or right side up, if i put the fan facing up into my case would it be blowing hot air or taking air from the case? first build so im kinda a noob

 

[mocchan]

Pointing it down so it can intake fresh air from the vents would be a good idea. Otherwise, the PSU fan may fight with the GPU for air

 

[jrayx]

You should put the PSU facing down, the Phantom 410 has some space between the floor/desk to intake cool air and a removable dust filter so your PSU will be dust free.