I add a third fan into my case, I don't have extra fan header in my motherboard because the others are being used by the case fans and cpu fan. the new fan is connected with the psu, I went to pc shop to buy fan spiltter cable and he told me that I don't need one, I can control the speed of the fan from bios. is it possible to control the fan speed that connected with power supply using molex connector. its run at full speed and its little noise