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PSU voltage issue

B

Briliu

Limp Gawd
Joined
Apr 19, 2006
Messages
269
I just recently built a new computer (3 days ago) after getting it all set up and installed and updated i started poking around with speedfan and cpuz and the like. Well, i noticed something weird.. I'm getting 11.09 according to speed fan and 11. 704 volts according to bios instead of 12 volts.

When i got home from work today i checked the values of all the output plugs on my PSU except the 24 pin one for the motherboard (I did check the 8 pin that goes above the CPU). All of these came out to be 12v or 12.20v (the 12.20 came from he 8 pin above the cpu).

Other values are fine, 5v is fine and 3.3v is fine according to bios. Speed fan doesnt show those also

I'm curious if this is as huge of deal as i think it is.

Is there a better program for checking voltages than speed fan? I havent done a search since i just got home.

My power supply is: SILVERSTONE ST70F 700W ATX12V / EPS12V

Mother board is: ASUS P5Q Pro LGA 775 Intel P45 ATX Intel Motherboard

Nothing is overclocked, and i only have enough of the modular cables plugged in to power what i need so theres a bunch of open slots.
 
The voltage is being mis-reported.
Either the voltage sensors output is outside of its expected range or the BIOS / driver is interpreting the values wrong.
Make sure you have the latest BIOS for your motherboard and the latest drivers.
If its still reading wrong values, you will have to live with it unless you can wangle an rma.
 
Install asus's "PC Probe II" software and check the voltage again. It should come with your MB cd or you can download it online free.

download it here
 
lifanus said:
Install asus's "PC Probe II" software and check the voltage again. It should come with your MB cd or you can download it online free.

download it here
Click to expand...

Still software, still going to just be a shot in the dark.

Only way to get a good reading is with a DMM and tolerances are +/-5%.
 
I tried upgrading the BIOS shortly after building the computer from my USB drive like asus says you can, but it gave an error and didnt go through with it. I cant do it with the windows version because of vista 64 bit. Program wont work on 64 bit, or so it tells me.

As an update though, EVEREST is reporting 11.7v as well. Thats within your 12±5%
(11.4 to 12.6) so i guess its still ok?
 
It's all software so its a shot in the dark.

If 11.7 happens to be correct it is within spec, but who knows with software.
 
Briliu said:
I tried upgrading the BIOS shortly after building the computer from my USB drive like asus says you can, but it gave an error and didnt go through with it. I cant do it with the windows version because of vista 64 bit. Program wont work on 64 bit, or so it tells me.

As an update though, EVEREST is reporting 11.7v as well. Thats within your 12±5%
(11.4 to 12.6) so i guess its still ok?
Click to expand...

Its not down to what Everest or any other monitoring software reports unless you have mapped every voltage to the real voltage.
They are useful tools for telling of something is going wrong from your baseline known good values.

If a good Voltmeter says the voltage is fine then it is :)
 
kk :) I wasnt sure if it was somehow dropping a volt or so somewher eon the motherboard between the plug and sensor or whatever.

I just wont worry about it unless i start to see weirder numbers or weird stuff happen!
 
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