Case fan direction to cool videocard?

[bigredelmo80]

My case has a location to put another case fan at the back of the case.
Which way should I put the case fan?
To blow air into my case and onto the videocard, or suck air out?

Is there only one way the case will fit?

 

[rickn]

as a general rule, there is a fan in front of the case that blows air in, and the fans in the back and in the power supply draw air out. Does the fan in your power supply draw air out? If so, the fan in the back would also draw air out.