Originally Posted by Mussels
same rule applies for CPU and your GPU: passive is a big nono. just replace the fans with large, low RPM models (or at least low noise) and set them to certain voltages you like. i hate variable RPM fans, and always hardwire mine to 7V or 10V
I run 110CFM deltas at 5V and get really good results without alot of noise. SilenX fans seem to be really good for airflow and being quiet.