Desktops are not used for long periods of time, and it is better not to switch to power. You get the power, you get it on the main panel, whether you press the button or not. In addition to the risk that the power supply will not be open for such a long period of time, there will be a certain cost of electricity, in addition to the risk that the power supply will not protect the main plate well during the surge. So why don't you turn on the main panel and get electricity? What's the electricity charge? Today we're going to count separately, so students who are not interested in technical lectures can jump directly to the second part。
Standby circuit
There is a deep misunderstanding among many about the power of the computer that the power button is not pressed, that the cpu fan is not turned, that the entire main panel and the computer system are not powered; that the switch is pressed, that the fan is not turned, and that the main panel and computer system are powered. But you see no, the power switch that the power buttons in front of the plate are connected to the main plate:
The power button on the front plate was not connected to the power source. If there's no electricity on the main plate, how does the button pass the signal to the power? How do you turn it off? If there's no electricity, how does the network turn on
Some people say these are fakes and there's electricity on the main board, except that the cpu has no electricity and the program hasn't run. People who play computers often know that the sata power, the ide power, cannot export currents to hard drives at this point until the power button is pressed. That's not the right answer。
In fact, just plug in the power lines, and before the buttons are pressed, the main plate has electricity and no electricity. How does that explain
Atx power main panel connected
With the exception of small btx power, most computers are atx power, and it has a 24-legged interface with the main plate:
The secret is hidden in this interface:
Pay attention to the part of my red box. Here's a map of the real quote:
Purple is a 5v standby stand-by power source, and it has electricity if it is plugged in, whether it is on or off. This power supply is provided for the turn-on circuit and for equipment such as wake-up on lan and usb, which require a wake-up machine, as well as for the ec and bmc。
The green po (power on) is the signal line for the main plate to notify the power source of the electricity and the downing:
Gray's power good (pg, pwr ok) is the signal line for the power notification panel:
Power process on main board
The electricity is provided that the power is always connected, but the opening button has not been pressed. At that time, part of the main plate was supplied by a 5v standby, working normally, while most of the circuits requiring 12v, 5v and 3v voltage were in a state of power failure。
1. Press the switch button。
Ps on# is low for main panel opener circuit drive (5v sb power)。
3. Over time, the power source began to export 12 vdc, 5 vdc and 3 vdc。
4. In a little while, the power was pulled up to the pg, informing the main plate that it had been installed。
The main panel begins its own uptime sequence below。
Electricity costing
Now we know that the power is connected and that standby power rail, who is connected to the main board, is powered, and these circuits provide all the equipment that needs wake up to ensure that they can awaken the machine, such as the wake on lan card. At the same time, the power supply psu was depleted when it was converted。
How do you measure the overall availability of the entire machine with so much consumption? Fortunately, many machines have to pass many standards, such as the logo, the energy star. Let's assume that the main machine is older and that the old version of the energy star requires less than 2 w of energy, and we'll see how much electricity is consumed in half a year:
2 x 24 x 183 = 8784 wh = 8. 8 kwh = 8. 8 degrees
Conclusions
The six-month plug-in and non-opening of the power plant, in addition to bringing in a billing of nearly 8. 8 degrees of electricity, may also cause damage to the main plate as a result of the use of relatively poor power sources during surges. Therefore, the power does not need to be plugged in, but care is taken to keep the main panel of the desktop in a dry ventilated area, where the ignominy is the enemy of the desktop (without plugging the power does not affect)。
