Derezzed Fan Controller
The Cooler Master Cosmos II Achilles heel is the fan controller, which causes many fan models to tick, sometimes with loud clicking noises whenever fan speeds are changed. I'm beginning to think the folks who have simply switched to a third-party controller took the right path. However, I decided to take Cooler Master's free replacement offer, and after a three-week wait an entirely new head/controller assembly arrived last Friday.
As a back-up measure, I also decided to go with Enermax manual-control case fans, which override and regulate fan speed locally with a small adjustment switch-box. If the Enermax fans misbehave with this Cooler Master controller, the plan is to keep the Cosmos II controller set on high for maximum power, and then manually regulate each fan down based on fan role/location/performance requirements.
It is a shame the case's fan controller is so problematic, given its otherwise excellent design. I probably should have just went with an entirely different fan controller...
Edited by SonicAgamemnon - 8/4/12 at 8:18am