I have a CM ATCS 840 case with a Corsair H100i cooling system. I have the radiator mounted at the top of the case (ceiling) and have 4 fans in push/pull. My question is: which direction should they be blowing (blowing in or blowing out) ?
The one fan in the rear is blowing out and all the others are blowing in. Also, the fan in the rear of the case (blowing out) is on a fan controller that can be set to 50 CFM up to 180 CFM, so can move a huge amount of air out of the case. I am thinking that the ceiling fans should be blowing in, because if they were blowing out, it would compete with the rear exhaust fan. However, I don't have much experience with cooling fans, so would like to hear what others think.