Intel® Desktop Board DQ67OW Technical ... - Viglen Download

Intel Desktop Board DQ67OW Technical Product Specification1.13 Real-Time Clock SubsystemA coin-cell battery (CR2032) powers the real-time clock and CMOS memory. Whenthe computer is not plugged into a wall socket, the battery has an estimated life ofthree years. When the computer is plugged in, the standby current from the powersupply extends the life of the battery.The clock is accurate to ± 13 minutes/year at 25 ºC with power applied through thepower supply 5V STBY rail.NOTEIf the battery and AC power fail date and time values will be reset and the user will benotified during POST.When the voltage drops below a certain level, the BIOS Setup program settings storedin CMOS RAM (for example, the date and time) might not be accurate. Replace thebattery with an equivalent one. Figure 1 on page 11 shows the location of the battery.26