Asus P9X79-E WS - Manual (Page 47)

6. PGLED3 LED
The ASUS Dr. Power LED near the ASUS Dr. Power switch lights up when the ASUS
Dr. Power switch is turned to enable.
7. +12V_PWR LED
The ASUS Dr. Power LED near EATX12V connector lights up when the ASUS Dr.
Power switch setting is turned to enable and there is no power detected going into the
processor.
ASUS P9X79-E WS 2-23