hrmm.. on the back side of the case?
were the motherboard tray is?
What I guess I would do if I was tempted to do that..
get a dremel.. cut a big square in the motherboard tray around the general area of were the back of the processer socket is on the back of the motherboard, then take a 120mm hole saw and drill a hole on the door of the case, around the area of the square u just cut out.. then air would blow on the back of the mobo around the cpu socket area..
Im not really sure what u were asking.. but If u want to do that Im more then positive it will work.. lol
I would use an alum. mesh filter, so dust doesnt get in to the back of the board n crap..
but that would keep the board a bit cooler..actually..
if I was u
I would make the 120 MM fan the top blowhole.. and the 80mm for the board cooling..
but its your case, and just have fun with it..
lhope u like the idea.. and hope thats what u were asking lol..
l8rz