Thanks for the responses. The manual doesn't appear to have any description of the differences between the fan connectors. I understand that not all the fan connectors will have control, but does it make sense that the Sysfan1 would only go from 50-100% or is there something I'm missing? I don't want to put a fan controller in the system for a few reasons: 1) I'd rather utilize the CPU onboard temperature rather than an external probe, 2) I trust MSI reliability more than a 3rd party fan controller, 3) religion/purity - this is a really minimal build: just an HD, SDD, and 5" Nvidia Keplar card. I can't really tell if the automatic settings are working because even if I run a tough 3D program, the CPU and GPU never get hot with the 140mm fan at 50%. I do see their temps go up a few degrees, but not enough to trigger a speed up the fan.