You need to have 4 prong plugs on your fans if you want to control the speed based on temps.
no you don't.. I have 3 pin fans that control based on temps also.... the 4th pin is only a control pin, and usually only used on CPU fans.. 3 pins are +12VDC, GND and SENSE.. the boards usually have temp sensors on the board when they are temp controlled fans close to the part they are measuring. My MSI board for example has 3 temp controlled fans, each one has a thermistor near the component that reports the temp to the motherboard which through BIOS tells a voltage controller on the motherboard to increase or decrease the voltage to the 3 pin fan port for it's associated device... you just need to know what ports are tied to thermsistors your motherboard manual tells you this
here's the big question... you have a fan, I assume it has a 3 pin connector, but does that three pin connector have 3 wires going to it from the fan? if it's just a red and black wire you need a new fan probably.. If you have a yellow wire also you have a true 3 pin fan... CPU's have red, black, yellow and blue