Best 230mm fans:
http://www.newegg.com/Product/Produc...=1&PageSize=20 other colors are available when they have them
These fans are excellent case fans. This size is typically found on HAF cases (such as the front air intake on the HAF X and HAF 932) and others. These fans provide ~50% more CFM than Cooler Master's stock fans. Recommended for intake only. Exhaust should be lower CFM than intake to keep dust out and to cool more efficiently (positive pressure).