Yup, I agree regarding the fan speed. Would be good to be able to set your own thresholds to some degree.  Might be a slight improvement if you installed them in slots 2,3,5,7,8. And make sure that the blanks covers are present in the other slots. Th...

How are your the blades in your non fully populated chassis installed? Meaning which slots are they in? Since each chassis fan cools the two blades in front, just wondering do all fans have a blade in front?