The cable from the case fan is too short to reach the motherboard. I am wanting to buy a 4 pin molex cable to 3 pin fan adapter, or an extention to hook the fan up to the motherboard. I dont know what to buy.
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If you buy a 3-pin to molex, the fans will be running at 100% all the time. If you buy an extension, they'll be controllable. Personally, I have my fans hooked to a fan controller, which then gets its power from two molex connectors.
Get extensions. They are cheap. Then you can monitor the fan speed and let the board control the speed (noise).