Corsair 850HX voltage readings

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I have a Corsair 850HX PSU, rest of specs in sig.

IIRC, it has been like this from day one. The +12 volt rail is reading 3.5 volts under a couple different programs. Now when I put the computer under load, it will go up to 12 to 13 volts. Could this be a false reading? I was told if it was that low, my computer would not run at all. If it is a false reading, why does it jump up under load? It almost seems like there is some kind of setting causing it to be low. But there isn't a setting that will do that, is there?

The +5 VCCH is a little low as well showing 3.6 volts. Everything else is where it should be.

Is this a definite problem with the PSU? Should I be worried about this? I may try to install it in a different computer. If I do install it in a different computer and it shows the same readings, does that confirm the PSU is messed up?

Now the bios shows the correct readings. Why would the bios show the correct readings and not in Windows?

Is there a way to test the PSU with a volt meter?
 
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I am currently using HWMonitor but I have also used Speedfan. Speedfan shows the same reading but the -12 volt rail is showing -1.17 being the only difference.

I checked the psu with a volt meter using the paper clip method and I was getting the correct readings. So does this confirm that the PSU is fine?
 
I have a hard time trusting sensors within Windows as usually they aren't accurate. If you used a volunteer and got normal.readings then you are fine.
 
Yeah, that is what I was thinking too. But I find it strange that the +12 volt reading jumps up when I put it under load. I would think if it was a false reading, that it would stay the same reading no matter what.

I still may try the PSU in another computer. If I do that, would I need to have the PSU installed inside the case? Could I just leave it sitting on the floor right by the case? That way I wouldn't have to take the other PSU out.
 
I have heard that as well. But I just don't understand this.

Is there a way to test the psu under load using a volt meter?
 
Like said in your first post, there is no way the 12v rail is at 3.3 volts with your computer still running. Ty PCWizard and see what it says.
 
PCWizard shows the same readings.

Something else I noticed. Back when I first built this rig the first of June, I took a screenshot of HWMonitor and cpu-z and it shows the processor pulling 50 watts. Today, it is pulling 150 watts. What is making it pull 100 watts more?

I did notice in the screenshot that the cpu was running at 2.1ghz. Where as now it is running at 2.6ghz. Would that make it pull 100 watts more?
 
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