Technical Reference 
 45 
Table 24.  Main Power Connector 
Pin Signal Name  Pin Signal Name 
1  +3.3 V  13  +3.3 V 
2 +3.3 V  14 −12 V 
3 Ground  15 Ground 
4  +5 V  16  PS-ON# (power supply remote on/off) 
5 Ground  17 Ground 
6 +5 V  18 Ground 
7 Ground  19 Ground 
8  PWRGD (Power Good)  20  −5 V (obsolete) 
9  +5 V (Standby)  21  +5 V 
10 +12 V  22 +5 V 
11 +12 V 
(Note)
 23 +5 V 
(Note)
 
12  +3.3 V 2 x 12 connector detect 
(Note)
 
24 Ground 
(Note)
 
Note:  When using a 2 x 10 power supply cable, this pin will be unconnected.   
 
For information about   Refer to 
Power supply considerations  Section 2.5.1 on page 52