+12.0 and -12.0 v question

kitkit201

Diamond Member
May 31, 2000
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Looking at my system, I was oc'ed on a xp2000 thorton to xp 2600+ which is from 1669mHz to 2089mHz

Anyways, I noticed that my voltage on MDM5 is running a bit higher than usual, 12.35 and 12.35 on the + and - respectively. I was wondering is this suppose to be as close to 12.0 threshold as possible or are the # correct?

Here is my setup

AMD XP 2000 Thorton oced to 2600
2 x crucial 2100 oced to 2700
1 x k-byte @ 2700
Asus A7N8X deluxe
Antec SLk-3700 BQE
Antec 350 Smartpower

I'm running the soundcard using builtin and also the lan.

Thanks in Advance
 

myocardia

Diamond Member
Jun 21, 2003
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Well, sure, technically it should be 12.00 volts at all times, but it's quite a bit better for you to be a bit over on any of the rails than to be under. And, yes, 12.35 is within the "normal" range. Try running 2 hard drives, 2 optical drives, and 5 or 6 large fans (by large, I mean 120mm, not 80mm!), then come back and tell us what voltages you're running! :D
 

kitkit201

Diamond Member
May 31, 2000
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haha, yes i am back, that is what i am exactly running

2 hdd, 2 optical drives, 1 floppy and 1 120 mm fan...
 

myocardia

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Jun 21, 2003
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Well, that means that you got a good power supply! I wish mine overvolted slightly... :(
 

VIAN

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Aug 22, 2003
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It's supposed to be at a constant 12, but that is impossible. Usually they up the voltage a little to give it head room so that it won't dip below 12. Connecting hardware to the powersupply drains a little voltage and other factors can mess with voltage regulation such as heat and interference.
 

lenjack

Platinum Member
Oct 10, 1999
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A variation of 5% is considered safe. That would be 12.6 volts. By the way, modern comps don't use the -12v line.
 

Amorphus

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Mar 31, 2003
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Originally posted by: lenjack
A variation of 5% is considered safe. That would be 12.6 volts. By the way, modern comps don't use the -12v line.

how about the -5v? because if those two aren't used, you could 24v- and 17v-mod a fan... :evil:
 

lenjack

Platinum Member
Oct 10, 1999
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Right. The -5 is not used. you can run a fan at 17v, but the fan may fail very shortly. Also, the current carring capacity of the -5v line may not be enough.