Power Supply DC Connector Pin Assignments1 memory moduleconnectors (1, 2, 3, 4)2 battery socket(BATTERY)3 SATA Connectors SATA0,SATA14 front panel I/Oconnector5 main powerconnector6 SATA connectors (4) (SATA2,SATA3, SATA4, SATA57 FlexBay USB connector 8 clear CMOS jumper(CLRCMOS)9 password jumper (CLRPSWD)10 PCI Express x1 cardconnector11 PCI Express x16 cardconnector12 PCI Express x4 card connector13 PCI card connectors 14 floppy driveconnector (FLOPPY)15 PS/2 and Serial connector16 rear fan connector 17 thermal sensorconnector18 CPU fan connector19 processor and heat sinkconnector20 processor powerconnector