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700W PSU with low readings

Last response: in Components
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December 9, 2009 11:46:26 PM

Hello all,

I have SpeedFan 4.40 and my 700W PSU is giving me very low readings in just about every category. Any help would be must appreciated.

First, here are my readings:

Vcore1: 0.00 V
Vcore2: 1.62 V
+3.3V: 0.54V
+5V: 5.03V
+12V: 4.80V
-12V: -3.97V
-5V: -1.79V
+5V: 5.08V
Vbat: 3.38V

There is very little fluctuation, maybe a thousandth of a volt on a few of these readings every once in awhile.

Now my machine specs:
PSU: OCZ ModXStream Pro OCZ700MXSP 700W 12V V2.2
CPU: AMD Phenom II X4 955
MoBo: ASUS M4A79XTD EVO AM3 790X ATX
RAM: G.SKILL Ripjaw Series 4GB
GPU: XFX HD-577A-ZHFC Radeon HD 5770
Case: CM HAF 922 (So you know it's real cool!)

Seagate 7200.11 1.5TB drive loaded with Win7 Ultimate 64-bit

If you need more info please don't hesitate to ask! Your help is much appreciated in advance! :??: 

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a c 702 ) Power supply
December 10, 2009 12:07:45 AM

In this case I would say that speedfan (as in many other) is wrong. There is no way your computer would be running this far of. Usually Asus has their own utility to monitor system health and you should be able to see all these voltages in Bios.
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December 10, 2009 12:14:18 AM

rolli59 said:
In this case I would say that speedfan (as in many other) is wrong. There is no way your computer would be running this far of.


I just installed and checked CPUID and it gives me the same readings except:

-12V: -10.11 V
-5V: -8.90V

I will be restarting momentarily to check the Voltages in the BIOS.
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a c 702 ) Power supply
December 10, 2009 1:38:19 AM

With 4.8volts on your +12volt rail all your components should be melting since they are seeing more than twice the amperage they should be getting. It is the amps that decide the size of the conductor in all electrical systems. CPUID is wrong to!
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December 10, 2009 2:33:02 AM

rolli59 said:
With 4.8volts on your +12volt rail all your components should be melting since they are seeing more than twice the amperage they should be getting. It is the amps that decide the size of the conductor in all electrical systems. CPUID is wrong to!


Yup, you were right. I checked the BIOS and it says that I'm running 12.48V on my +12V and 5.08V on my +5V rail. Thank you very much. I was freaking out there for a bit.
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