Hardware Quiz #46: PSU's - Techist - Tech Forum

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Old 10-30-2004, 01:14 PM   #1 (permalink)
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Default Hardware Quiz #46: PSU's

When you push the power button on the tower it sends a _____ volt signal to the PSU.

Answer: c. 5 volts

Today you turn on the power with a little push button, and you turn off the machine with a menu option. These capabilities were added to standard power supplies several years ago. The operating system can send a signal to the power supply to tell it to turn off. The push button sends a 5-volt signal to the power supply to tell it when to turn on. The power supply also has a circuit that supplies 5 volts, called VSB for "standby voltage" even when it is officially "off", so that the button will work.
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Old 10-30-2004, 01:20 PM   #2 (permalink)
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I don't think my PSU/mobo supports this. I think its a 230volts signal.
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Old 10-30-2004, 01:28 PM   #3 (permalink)
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remember, not the incoming power........the power button on the tower itself
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Old 10-30-2004, 01:37 PM   #4 (permalink)
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I don't think my button sends anything to the PSU. I think it just disconnects one of the 3 wires inside the 230volts cable to turn off the computer.
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Old 10-30-2004, 01:49 PM   #5 (permalink)
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he he he haha (as i laugh evily) ^o__o^
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