|You probably haven't damaged the power supply, but you may have one or more connection that is loose and unreliable. Try each female socket on one pin to see whether it's too loose or not. If that's not your case, you may have damaged the mboard fan circuits. One of the three wires for each fan is an rpm readout - you're not supposed to connect the rpm readouts for more than one fan to one header, if the 3 pin header connects to an rpm sensor (some older mboards have nothing connected to the rpm pin), but it's okay to connect the two power wires for each fan to the same header. |
The mboard fan circuits for a 3 pin fan header do NOT normally control the rpm of the fan or whether it is on or off.
" I figured I'd plug the quiet fan, to give it the most power, on one outlet of the splitter, and use the second splitter on the other outlet. On the remaining outlet from the first splitter I attached the quiet fan since its quiet I'd figure I'd give it the most power. On the second splitter I connected both the noisy fans to give them less power so maybe they will be less noisy."
The splitters don't split the voltage - all the fans get the same voltage - the fans are connected in parallel, not in series - they add the current requirements of all the fans connected to them together.