"While increasing the cooling capacity of your computer is a very important thing to do, the Vizo Propeller is not a one size fits all solution. The expansion slot type of cooling fan has been around for quite a while. Is the Vizo Propeller an improvement over the many that have come before it? Well it does the same thing but it blows out instead of bringing in cool air to cool a component. The Propeller does provide a small benefit by increasing air flow through a part of the case that rarely is ventilated properly. At stock loads there is no benefit to the Propeller. Measured with the IR thermometer the outside of the card was slightly warmer with the Propeller than without it."