This will boost the airflow within your PC and will ultimately reduce GPU temperatures. As a final tip, always make sure that nothing is blocking the airflow from the intake fans to the GPU fans.
PC components produce heat and the primary way of handling this is by pulling cool air inside the chassis and exhausting the waste heat. That's where the trusty case fan comes into play.
The reason for this is that many professional-grade GPU accelerators are installed in rack-mounted server cases, and are therefore equipped with heat sinks but no fans: the case is meant to ...