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I am reading 12.408V off my 12V rail should i be worried?

post #1 of 26
Thread Starter 
Okay so i noticed on my Pentium 4 system it says my 12V rail were almost always 12.4V so i went and got a digital multimeter and it was right its pushing 12.408V on the rails is this too much and should i toss it and get a new one?
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post #2 of 26

That's actually still within ATX spec, so it's technically ok:

 

https://en.wikipedia.org/wiki/ATX#Power_supply (scroll down just a few inches to the next chart)

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post #3 of 26
Yeah, that seems a bit on the high side. The most variation you should have is .05.
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post #4 of 26
Quote:
Originally Posted by arkenex View Post

Yeah, that seems a bit on the high side. The most variation you should have is .05.

that is for sure not the case. typically 5% is within spec, so over 12.6 i would start to wonder why.
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post #5 of 26
You are fine with this.

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post #6 of 26

Yeah, like I said: it's within ATX spec:

 

https://en.wikipedia.org/wiki/ATX#Power_supply

 

Scroll down to the next visible chart.

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post #7 of 26
Quote:
Originally Posted by philhalo66 View Post

Okay so i noticed on my Pentium 4 system it says my 12V rail were almost always 12.4V so i went and got a digital multimeter and it was right its pushing 12.408V on the rails is this too much and should i toss it and get a new one?

That sounds a bit high. Do you have stability issues? Since it's a Pentium 4 I assume the PSU is also pretty old. There's something you can do, but it carries a shock risk if you're not careful. Open your PSU, and check the capacitors for any bulging or leakage. But DON'T touch any components. If there are blown capacitors, replace the entire PSU immediately, it can damage your computer. If you can afford it, I'd recommend getting a new one anyway, due to the high voltage. Mine is between 11.968V and 12.144V with an average of 12.08V (keep in mind it's a software reading).

EDIT: It might sound obvious, but remember to unplug the computer before doing anything to the PSU.
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post #8 of 26
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

That's actually still within ATX spec, so it's technically ok:

https://en.wikipedia.org/wiki/ATX#Power_supply (scroll down just a few inches to the next chart)

Okay them I'm good
Quote:
Originally Posted by arkenex View Post

Yeah, that seems a bit on the high side. The most variation you should have is .05.

but from what the link above says up to +-5% is safe
Quote:
Originally Posted by navynuke499 View Post

that is for sure not the case. typically 5% is within spec, so over 12.6 i would start to wonder why.

So This thing is getting close to out of spec bigeyedsmiley.png
Quote:
Originally Posted by KaRLiToS View Post

You are fine with this.


Wow thanks for the advice guys but i will probably still look around for a replacement just to be on the safe side.
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post #9 of 26

But it's still within spec. 12.60 is the maximum accepted +12V voltage for ATX spec. If this is a crappy old PSU, then this isn't bad. lol It's still chugging along.

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It's a computer!
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post #10 of 26
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

But it's still within spec. 12.60 is the maximum accepted +12V voltage for ATX spec. If this is a crappy old PSU, then this isn't bad. lol It's still chugging along.


It is fairly old i bought it back in june of 2009 its the OCZ MODXSTREAM PRO 600 watt in my SIG
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