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Coolermaster 650 watt PSU voltage?


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#1 blueballs

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Posted 23 November 2012 - 10:40 PM

I have a Coolermaster 650 watt model# rs-650-pcar-e3 of unknown providence,I got it from the local computer shop for $5 and he said it should be OK? It was full of dust and crap so after cleaning it out and checking for anything obviously wrong I did a voltage check without plugging it into the motherboard or anything. The 12v reads +12.40v and -12.39v 5v is +4.95 and -4.95v, 3.3v, is +3.42v would that be right because it is unloaded? I'm being careful here so that I don't fry my motherboard.

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#2 Phoenix102

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Posted 24 November 2012 - 01:01 AM

Hi Blue,

Yes, you are fine with those readings. Remember, computer power supplies are not precision power supplies. They are close in voltage. The motherboards on board voltage regulation circuitry takes over for fine tuning the voltage levels. Here is a great article with an explanation.

Phoenix102

#3 dpunisher

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Posted 24 November 2012 - 08:11 AM

You are mainly worried about the voltage under a load. Unloaded voltages can often read outside of what you will get with a moderate load.

Oh, its "provenance".

I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)

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#4 blueballs

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Posted 24 November 2012 - 10:27 PM

Thanks for the good news fellas and thank you dpunisher for your eagle eye english spell checker abilities.Ha!




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