Intel Desktop Board DH61AG Technical Product Specification 
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1.13.2.1  Power Input 
When resuming from an AC power failure, the computer returns to the power state it 
was in before power was interrupted (on or off).  The computer’s response can be set 
using the Last Power State feature in the BIOS Setup program’s Boot menu.   
 
 
For information about   Refer to 
The location of the internal power connector  Figure 13, page 49 
The signal names of the internal power connector  Table 35, page 60 
1.13.2.2  Fan Headers 
The function/operation of the fan headers is as follows: 
•  The fans are on when the board is in the S0 state 
•  The fans are off when the board is off or in the S3, S4, or S5 state 
•  Each fan header is wired to a fan tachometer input of the hardware monitoring and 
fan control ASIC 
•  All fan headers support closed-loop fan control that can adjust the fan speed as 
needed 
•  All fan headers have a +12 V DC connection 
•  Fan headers can support both 4-wire as well as 3-wire fans.  4-wire fans are 
controlled by Pulse Width Modulation; 3-wire fans are voltage controlled. 
 
 
For information about   Refer to 
The location of the fan headers  Figure 13, page 49 
The location of the fan headers and sensors for thermal monitoring  Figure 9, page 38