Often located on specific pins within the 14-pin block.
Typically a 13-pin block including power switch, reset, and HDD LED. lenovo is7xm rev 10 motherboard manual
14-pin ATX power connector (requires an adapter for standard 24-pin ATX power supplies). Secondary: 4-pin 12V CPU power connector. itsupermarket.com Pinout & Header Information Often located on specific pins within the 14-pin block