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How to control fan speed when plugged into power supply?

Im adding two case fans to the side of my case, but my mobo doesnt have anymore hookups. I know I can plug them right into the power supply but I want to be able to adjust the fan speed. I was looking at some antec tri cool led case fans that come with a 3 speed switch. Will the switch work when running fans directly off the power supply? I really dont want them going 100% all the time. If not how can I controll fan speed when they are running off my psu?

Cpu: Amd Phenom II x6 1055t
Case:Zion Predator 970
Mobo: Gigabyte GA-970A-D3
Gpu: Evga gtx 560 TI
Psu: Corsair AX750
7 answers Last reply Best Answer
More about control speed plugged power supply
  1. can't sorry :p
  2. So is my only option to look for fans that run more silent at 100%. If so any suggestions for quiet running 120mm fans?
  3. use this so the motherboard could control the fan speed
  4. scythe gentle typhoons are very quite and still move alot of air
  5. scout_03 said:
    use this so the motherboard could control the fan speed

    Is it safe to draw the extra power for additional fans from the mobo using a splitter?
  6. Best answer
    for two fan it's good ,buy the ones with 3 pins connector without speed switch
  7. Best answer selected by atwon23.
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