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# "-5" voltage reading in the positives

### #1 musenji Posted 30 April 2005 - 01:28 AM

musenji

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Hello. My hardware monitor (SilentTek) tells me that my -5 voltage is ranging from +3.45V to +3.60V. All other voltages are pretty normal (-12 is a bit high, from -10.9V to -11.2V, but for that I just expanded the allowed range to accomodate). I have hooked up three different power supplies, all with the same result.

Does anyone know what this might mean, hardware-wise? I'm assuming it must be the motherboard, which I just bought on Ebay to replace my old one. It's the exact same model: AOpen AK79G-VN. I never had this problem with my old mobo..

Thanks for any help anyone can offer, just let me know if you need more info.

Ben
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### #2 Chronos0001 Posted 30 April 2005 - 10:14 PM

Chronos0001

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Hello there,

First things first... if everything is working OK, DON"T mess with it.

Your power supply provides a breakdown of 3 basic voltages.
24 vdc
12 vdc
5 vdc

Each one of the volatages has a specific purpose in your computer cabinet.
24 volts is for your motors (fans)
12 volts for drives
and 5 vdc for circuit power.

DC voltage is unique in that if the leads are reversed, a DC motor will turn in reverse.
Negative voltage is also used a reference voltage in logic circuits. Where from -5 vdc to +5 vdc there is a 10 volt spread. The negative voltage may be a static device that is waiting for another signal to influence it before switching to a positive voltage to activate.

Just remember that you are using a software program that is telling you that your computer has a bad voltage indication. But at the same time, everything is working on your system. I would trust that everything is working properly and send a bug report to the diagnostic software designer.

Hope this helps.
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