PC Power Supply Voltage - and Wattage. 

Learn more about the voltage and wattage of the power supply you require.

It’s crucial to verify the PC Power Supply voltage and wattage to avoid court circuit (high voltage) risk for your devices and/or even you PC.

As a matter of fact, all the devices in a PC use a stable low-voltage direct current (DC) provided by the conversion of 110-115 volts (AC) alternating current (or 220-230 in certain countries).

Using the switcher technology, the power supply supplies the typical 3.3 volts, 5 volts, 12 volts to provide to the devices with the usable DC current. See the table below.

PC Power Supply Wattage.

As it's important to know enough about PC Power Supply Voltage it also requires to know how many watts the computer power supply has been rated to generate and if this value is sufficient (or exceed) to run your machine at its full potential.

Most of manufacturers actually release power supply of 230 W to 300 W even if some computers are designed to operate at least with a 145 W power supply. Nevertheless the minimum required depends on the total power used by the devices.

If the total power is 230 W, for example, you’ll need more power to run the machine. But if the total is 250 W it doesn’t make sense to have a 230 watt-supply.

You understand that the power supply won’t be able to produce more power it has been designed to generate. On the other hand if the total is 250 W it’s not necessary to use a 400 watt-supply unless you plan to add other peripherals to your PC.

Here are some reference to help you to come to a good decision about the PC Power Supply Voltage and Wattage.

Notice 1. Always examine the PC Power Supply Voltage-and Wattage on the label shown on the side like this:

Notice 2. +5 VSB is a circuit called VSB (voltage stand by) that supplies 5 volts power to get your computer into power stand by for saving power. You’ll get your computer back instantaneously to your work area whenever you press a key on your keyboard or move your mouse.