Any info helps, thank you. I have been into computers but never bothered getting to into building them. Now I have the time and getting the money and parts I feel like having some fun with them. I just spent the good half of a day figuring out why my computer was over heating to 70C. I figured it out and the comp I have has a smart fan 2 in it. Who ever used this had it plugged in and thats it. This fan comes with a harness for a temp probe and a harness for a potentiometer to control the fan speed. None of these came with the machine and the fan was running to low. I had to hook a switch to it to control the speed. The fan can blow 75.6 CFM at 5600 rpm. When its going full speed sounds like a turbo.