3 Pin Fans and a DS3

Right, after the horrendous amount of time I've spent trying to connect about 20 fans, a pump, 2 LEDs and numerous other things to about three 4 pin molexs I've decided to swap out some of the 4 pin fans for 3 pin fans.

Im going to go for the Arctic Cooling AF12025 fan.

I wanna put 6 of these on my motherboard, with the use of three headers and three 3 pin splitters. Any adverse effects if I put that many fans on a mobo ? I read somewhere just now that older motherboards cant handle some 3 pin fans due to amps/wattage and what not and was just wondering of 6 of those Arctic Cooling fans would work on my trusty DS3.

Cheers ... :)