Review on Scythe Kaze Flex 120mm Slim PWM Fan, 300-1200RPM, Quiet Performance for Case/CPU Cooler, Single Pack by David Boulanger

Great fan. Not totally silent, but when you put a bunch of fans in a suitcase, you can't rule everything out. I have a Corsair Crystal 280X case. Full height fans will not fit in the bottom of the case when a PCIE card is installed in one of the bottom mobo slots. This matched enough clearance and caused my internal temperatures to drop drastically. I also installed some taller feet to get better air intake under the case.