None what so ever 
my channels must be under quite a bit of stress too as I have 4 x 180mm fans on the one channel, and 3 x 120mm vipers on another, handles it no bother
I certainly wouldn't put that many fans per channel on one of the 'lesser' controllers with only 10w/chan available

my channels must be under quite a bit of stress too as I have 4 x 180mm fans on the one channel, and 3 x 120mm vipers on another, handles it no bother

I certainly wouldn't put that many fans per channel on one of the 'lesser' controllers with only 10w/chan available
