Question about HP ATX-300-12Z (ATX30012ZBD) 300-Watt Power Supply

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On the back of this power supply, Theres a red switch with the numbers, 115 and 230. depending on which way it was switched on. Can someone please explain to me what this is?

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Hi inforis,
That is a setting that will change the voltages, and you do not want to flip that switch. If you do there is a chance you will fry your computer. Different countries use different voltages. It's cheaper to make a switch & some circuits inside the PSU than make a whole new one. List of countries with frequency & voltage (
Hope that answers you question well enough.

Posted on Dec 29, 2010

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