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Power supply tolerances? (11.14vdc?)


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#1 Wartrace

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Posted 16 December 2009 - 05:25 PM

I just got done testing my power supply and everything was fin with the motherboard conectors EXCEPT one 12vdc pin which was reading 11.14VDC. Is that out of tolerance? By PC won't even boot to bios, it slowly started having issues of hangung during the bios or before bios (on the splash screen). Is this power supply out of tolerance?

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#2 dpunisher

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Posted 16 December 2009 - 05:41 PM

If it is 12V+, then it is out of spec. If it is 12V-, then it is in spec. 12V- really doesn't apply to any newer systems.

What are you checking voltages with? If you are checking the PSU unhooked (just grounding the green wire), then be aware that some PSUs output wonky voltages when completely unloaded. You can check voltages on the yellow wire on one of the molex connectors with everything hooked up for something more reliable.

Edited by dpunisher, 16 December 2009 - 05:43 PM.

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#3 Wartrace

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Posted 16 December 2009 - 06:34 PM

If it is 12V+, then it is out of spec. If it is 12V-, then it is in spec. 12V- really doesn't apply to any newer systems.

What are you checking voltages with? If you are checking the PSU unhooked (just grounding the green wire), then be aware that some PSUs output wonky voltages when completely unloaded. You can check voltages on the yellow wire on one of the molex connectors with everything hooked up for something more reliable.

It is the -12v pin (pin #14), I read it as positive but it was reading -11.14

#4 Platypus

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Posted 17 December 2009 - 07:39 AM

As said, -12v is unimportant, and its voltage in practice is often not accurate.
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