but I'm a fan of cooling fans. Have two, blowing cold air from the front of the case, and one large fan sucking out the heated air at the rear. As well as these, my PSU has two fans, one sucking the heated air above the CPU and the other presumably sucking the air out of the case.
The ideal cooling system blows cooling air across the motherboard with extracter fans a the rear. (I think!) My present CPU temp is 37C and motherboard temp 22C.
Hope this helps.
PS Have a very large heatsink & fan on the CPU