Case fan circuit questions

so I'm not very good with circuits

my case has 2 8w fan control leads

I am looking at 4 of these fans: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
(Panaflo 120mm, power rated 6.12W max)

I am wondering whether I can use 2 3-pin Y cables and control these fans in pairs. Will that still allow me to run them at full rpm or will is lower their max rpm or some other bad consequences?


In the event that my suspicions are correct, I am looking at this fan controller: http://www.frozencpu.com/products/11435/bus-230/Lamptro...

since i have other fans besides the panaflos I want to control, I would still be interested in running the panaflos in pairs, does this controller just do 7.5W (30/4) a channel or does in disperse the 30 wattage out as needed over the 4 channels?