Report Compatibility and Setup in General Questions Posted February 6, 2017 First of all, the above solution is the last resort when the USB port doesn't provide 5 volts by itself in the shut down mode. I've just mentioned that this can be done. It certainly shouldn't if not needed. As for the "adaptor", there are ATX 24-pin extension cables.Regarding the power on function, the Flirc SE does its "magic" by acting as a physical power button. You need to disconnect your case's power button from the motherboard, then you connect Flirc SE to the power button pins on the motherboard by using included cable. After that you connect case's power button to the Flirc, so it still works.