MOTHERBOARD POWER STAGES

There are the states of the laptop depending on the power consumption of the motherboard. You already know two states when the laptop is on and when the laptop is off.

The motherboard states are referred in character "Sx". Where the X is the number between 0 and 5.

1) S0= Working system is fully usable, All the components have their voltages.

2) S1, S2, S3 = sleep.  The laptop appears to be off; the laptop consumes less power than S0 state. The RAM has its voltage, and kept refreshed, to wake up the laptop you need only press a key, the keyboard or move the mouse.

3). S4 = HIBERNATE= The system appears to be off, and the power consumption to be reduced to the lower level, an image of RAM is kept on disk because the RAM loses its voltage, to wake the laptop you need to the press power button. 

4) S5 = shutdown.

MOTHERBOARD VOLTAGES:

There are four types of voltages in the motherboard.

ALWAYS SUPPLY (ALW or AUX or AL):

            Thes voltages are always present even the laptop is off, on one condition: the battery should be placed, or the charger plugged in, these voltages are.

                        5V DC

                        3.3V DC

The 5v and 3.3v come from VOLTAGE GENERATOR IC in the motherboard.

SUSPEND VOLTAGE (SUS_ON):

                These voltages are present in SUSPEND or SLEEP MODE (S1, S2, S3):

                                        5V DC

                                        3.3V DC

                                        RAM VOLTAGE (1.2V/1.35V/1.5V/1.8V/2.5V/3.3V)

POWER ON VOLTAGE (RUN) (S0 STATE):

        All the components have now their voltagees.

                            1.05v

                            1.8v

CPU CORE VOLTAGE:

            CPU require core voltage i.e., high current approximately 20 amp TO 30 amp.

            In the new motherboards graphic chip also integrated to CPU. So, the graphics core voltage also required. These voltages are called as GFX core voltages.

These voltages called approximately.

                    CPU CORE = 0.8V TO 1.5V/ 20AMP TO 30 AMP

                    GFX CORE = 0.8V TO 1.8V /10 AMP TO 20 AMP.