Summary: Here are the specs for the Antec PRO 120mm DBB Case Fan: Ball bearing design Volumetric airflow: 79 CFM Fan speed: 2,000 rpm Acoustic noise 29.8 dBA Basically, this fan moves more air (CFM) than stock CPU case fans and at a higher speed (normally 1,000 rpm is average) but the noise is nearly twice as high (normal case fans are around 16-19db). So you'll get noticeable cooling performance but at the cost of noisier operation.
Summary: I bought this fan in order to replace an dying fan in my desktop. So far the fan works pretty well albeit it does run a bit loud but that might be because I replaced the dying fan with two others.
Summary: This fan can really move plenty of air, but since it's 120 mm, it doesnt have to operate at maximum speeds in order to move lots of air. This therefore makes it a quiet fan. You can also connect this to either your motherboard or to a 4 pin molex connector.
Summary: This case fan pushes a lot of air and gives excellent airflow throughout the case. The fan comes with both 4-pin and 3-pin connectors. Plugging the fan into my motherboard header allowed me to change the fan's speed. Running it at a lower speed was much quieter, without sacrificing too much airflow. Quality product by Antec.