Incorrect voltages

[regnez]

SpeedFan is telling me this.

The 12v is not even close, and the 5v is pretty far off. Should I be concerned about this?

 

[Boyo]

I wouldn't trust those readings. What mobo are you using? If you have a board like an Asus, you can use the PC Probe to get your voltages, which would be more accurate.

 

[bendixG15]

Most decent mobo would shut down if the voltages are way off like those numbers.

The operating tolerances are in the 5-10 percent range, don't recall the exact figures but GooGle would tell you.

 

[Matthias99]

Originally posted by: regnez
SpeedFan is telling me this.

The 12v is not even close, and the 5v is pretty far off. Should I be concerned about this?

-12V and -5V are not needed on new motherboards (the latest ATX spec actually dropped them.) Most likely there is nothing connected to those voltage monitoring pins and it's just reading random junk.

However, your +12V reading is obviously not coming through correctly. Try another monitoring program; maybe Speedfan doesn't work right with your motherboard right now.

Also keep in mind that software voltage monitors are notoriously inaccurate; the only way to *really* see what the PSU is putting out is to take a multimeter and check the voltages manually.

 

[regnez]

I didn't even notice that the 12v at the bottom was at 0 until you said that...

Could anyone recommend a good program for monitoring voltages, then? I Googled, but with bad results. I am using a Gigabyte 965P-DS3, if that helps.

Thanks for all the advice so far.

 

[Gautama2]

Get a DMM and check.

 

[regnez]

Originally posted by: Gautama2
Get a DMM and check.

Looking those up, they seem to cost quite a bit. Do they make one that can check certain voltages in your computer rather than the entire computer itself?

 

[Leros]

You can get a $10 multimeter and manually measure the voltages.

 

[bobsmith1492]

http://www.radioshack.com/product/index...imeter&kw=multimeter&parentPage=search

 

[regnez]

Originally posted by: bobsmith1492
http://www.radioshack.com/product/index...imeter&kw=multimeter&parentPage=search

I think that I will head to radioshack after work today and pick one of those up.

It would mean that the voltages not being correct is a fault of the power supply, and not the motherboard, right?

 

[bobsmith1492]

If the meter reads correctly, then the voltages are fine and the motherboard is just reading them wrong. If the meter reads wrongly, then there's probably a problem with the power supply, though seeing as the 12V line reads zero, the motherboard is obviously reading it incorrectly or else your computer would not be running...

Also, like Matthias said, modern computers do not use -5 and -12 lines. If switching supplies have no load, they can do goofy things, but since they're not used, there is no need to concern yourself.