1-4Chapter 1: Product introductionC.P.R. (CPU Parameter Recall)The C.P.R. feature of the motherboard BIOS allows automatic re-setting to theBIOS default settings in case the system hangs due to overclocking. When thesystem hangs due to overclocking, C.P.R. eliminates the need to open the systemchassis and clear the RTC data. Simply shut down and reboot the system, andBIOS automatically restores the CPU’s previous setting for each parameter.ASUS EZ Flash BIOSWith the ASUS EZ Flash, you can easily update the system BIOS even beforeloading the operating system. No need to use a DOS-based utility or boot from afloppy disk. See page 2-5.ASUS Instant Music LiteThis unique feature allows you to playback audio files even before entering theoperating system. Just press the ASUS Instant Music special function keys andenjoy the music! See page 2-21.1.4Before you proceedTake note of the following precautions before you install motherboard componentsor change any motherboard settings.Before you install or remove any component, ensure that the ATXpower supply is switched off or the power cord is detached from thepower supply. Failure to do so may cause severe damage to themotherboard, peripherals, and/or components.Onboard LEDThe motherboard comes with a stand-by power LED. When lit, the green LEDindicates that the system is ON, in sleep mode, or in soft-off mode, a reminder thatyou should shut down the system and unplug the power cable before removing orplugging in any motherboard component. The illustration below shows the locationof the onboard LED.P4S800D-XP4S800D-X Onboard LEDSB_PWR1ONStandbyPowerOFFPoweredOff
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