I found an old pc fan from a broken comp. And I found out that it is a Brushless DC fan from the company Delta electronics at 3250rpm, 37.4 CFM, and 34dBA. It's also a 3-pin and an 80mm fan. I'm guessing the CFM/dBA ratio isn't too good? So far I have 140mm intake in front, 120mm exhaust in rear, and 120mm intake on side. And I have another side fan slot available, should I use this fan I found? The available fan slot is in front of the graphic card. If I use this will the air circulation be fine? Or maybe a top blowhole?