hi there, i was wondering if i wanted to add 2 new case fans just to help with the temperature is this easy and would pcs be able to guide me through connecing fans up if i called them and placed an order with them the cae is the corsair 500r, and it seems to two nice big fan spaces at top, and also would these be to extract the hot air or to blow cool air down towards graphic cards, advice be great. thanks