Intel DH55PJ BOXDH55PJ Manual De Usuario

 25

 

A coin-cell battery (CR2032) powers the real-time clock and CMOS memory.  When 
the computer is not plugged into a wall socket, the battery has an estimated life of 
three years.  When the computer is plugged in, the standby current from the power 
supply extends the life of the battery. 

The clock is accurate to ± 13 minutes/year at 25 ºC with power applied via the power 
supply 5V STBY rail. 

 

When the voltage drops below a certain level, the BIOS Setup program settings stored 
in CMOS RAM (for example, the date and time) might not be accurate.  Replace the 
battery with an equivalent one.  Figure 1 on page 11 shows the location of the battery. 

The hardware management features enable the board to be compatible with the Wired 
for Management (WfM) specification.  The board has several hardware management 
features, including the following: 
•  Hardware monitoring and fan control 
•  Fan Monitoring 
•  Chassis intrusion detection 
•  Thermal monitoring 

The features of the hardware monitoring and fan control include: 
•  Intel Quiet System Technology, delivering acoustically-optimized thermal 

management 

•  Thermal sensors in the processor and PCH, as well as near the CPU voltage 

regulators and system memory 

•  Monitoring of five system voltages (+5 V, +12 V, +3.3 V, Memory V-SM, and 

+V

CCP

) to detect levels above or below acceptable values 

•  Thermally monitored closed-loop fan control for all three fans that can adjust fan 

speed as needed