Once the voltages are flowing, the motherboard must verify they are stable.
The desktop motherboard power sequence process can be divided into several stages: desktop motherboard power sequence pdf exclusive
The SIO sends this signal to the South Bridge to "wake it up" from a deep sleep state. Stage 2: Power Button Trigger This is where the user interacts with the hardware. Once the voltages are flowing, the motherboard must
Now that +3.3V and +5V are stable, the SIO generates a (Resume Reset) signal to the PCH. This tells the PCH: "Standby voltages are clean; you may wake up." Once the voltages are flowing