power supply tester Voltage test :+12V, -12V, +5V, -5V, +3.3V,+5V Stand by (SB) 12V power Good ( PG )Voltage ... source : 20/24 pi Power Supply Tester The SD power supply ... the corresponding jack of the power test suite Power on the supply of power,will hear (DuDu" ring, ... ,-12V,+5V,-5V,+3.3V,5V stand by (SB) 12V power good(PG) Connectors:floppy,HDD,CDROM,SATA ...