I have a centurian 5 case, with the stock 80mm 26cfm in front as well as a silverstone 120mm 106cfm. In the rear I have the stock 120mm 43cfm pushing air out. The silverstone pumps a bit of air in, but the stock rear fan barely pushes anything out. I was wondering if replacing the rear fan with a fan with more cfm will help with temps and airflow. My current temps with coretemp 41 (36 with speedstep) idle, and 56 under load with orthos. my ambient temperature is 24. For cpu cooling I have a zalman 9700.