I am debating on purchasing the Asus Sabertooth Z97 mobo because my case came with 3 pin fans which are dc. I understand that Fan Xpert 3 controls the fans by PWM. My question is, is there an option in Fan Xpert 3 to control 3 pin fans via dc or do I have to have 4 pin fans? Also, are 3 pin fans even compatible with this mobo, as I saw that the fan connectors are 4 pin. I want the mobo to take care of my fans RPMs for me based on temperature.