Add extra CPU cooling capacity to your ATX8300PRO case with this easy to install side fan kit. It mounts easily to the rear of the case and aligns with the venting holes in the side panel. The swing arm design allows the fan to be moved out of the way when working on system components. A removable, cleanable foam air filter prevents dust from entering the system and accumulating on components. It is positioned directly above the CPU to provide the CPU fan with cooler external air for improved processor cooling capability.