If you mount the rad flat against the case, you can pretty much do the pull config, also if the rad is flat against the case, where will the air come from? the small space between the rad and the case wont allot enough air to pull through, thats why people use brackets so theres at least a lil space
you always need a fan for a rad unless its a passive radiator
you can use fan pin extenders or if you want
or a fan pcb board powered by a molex cbale such as this http://www.frozencpu.com/products/14...tl=g47c121s424
and also, depending on your rad, youll need different fans
generally, low fin density rads can accommodate a wide range of high CFM fans, also, fans can be run at a lower speed because air moves past the rad without much "push" therefore, its quieter.
but high fin density fans need fans with high static pressure such as the gentle typhoons, but generally tend to need louder fans but will cool very very wellEdited by mnkeyprince - 11/1/11 at 9:45pm