The motherboard is a msi gaming 7 wich seems to only have 2 4pin fan conectors for the cpu and the rest is 3pin. Can i use a pwm splitter to connect all 3pin fans to the 4pin cpu so that it automaticly controls it with the settings i choose???
Yes - 3 and 4 pin connectors are interchangeable. 3 pin fans change speed by adjusting voltage - from the motherboard, with a controller or with a resistor.