Low core voltages causing chirping

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oldman

My XP box with Xp pro is constantly chirping. I have finally
determined that this is being caused by a low core voltage. the
voltage should be 3.3 but the bios are reporting it is 2.99 to 3.00.
Can someone tell me how to fix the problem. Could this be caused by
the power supply? I do not have a probe to physically examine the
power supply. I have ASUS probe installed and did notice the
fluctuating voltages as reported by the voltage monitoring module.

If you run with low voltages could that cause a problem? When the
voltages drop the drop does not appear to exceed 10%. On the other
side when examining the plot from ASUS probe I noticed some spiking of
about 15% when it occurred.

Here are details on the computer:
Motherboard is an ASUS P4S8X built from components
Intel Pentium P4 chip 2.4 GHz
1 GB RAM
4 hard drives
ATI video card Radion 9600

ASUS Probe v2.4 says everything is ok but the Bios under vcore to left
indicates 3.3 but actual between 2.96 and 3.05 and flashes red.

Do you need any other data to be of assistance?

Thanks
 
My XP box with Xp pro is constantly chirping. I have finally
determined that this is being caused by a low core voltage. the
voltage should be 3.3 but the bios are reporting it is 2.99 to 3.00.
Can someone tell me how to fix the problem. Could this be caused by
the power supply? I do not have a probe to physically examine the
power supply. I have ASUS probe installed and did notice the
fluctuating voltages as reported by the voltage monitoring module.

If you run with low voltages could that cause a problem? When the
voltages drop the drop does not appear to exceed 10%. On the other
side when examining the plot from ASUS probe I noticed some spiking of
about 15% when it occurred.

Here are details on the computer:
Motherboard is an ASUS P4S8X built from components
Intel Pentium P4 chip 2.4 GHz
1 GB RAM
4 hard drives
ATI video card Radion 9600

ASUS Probe v2.4 says everything is ok but the Bios under vcore to left
indicates 3.3 but actual between 2.96 and 3.05 and flashes red.

Do you need any other data to be of assistance?

Thanks
Click to expand...

I put an answer into the original thread.

The 3.3V is not your Vcore. Processors stopped using 3.3V for Vcore a
while ago. Processors now are 1.5V or lower, so what you're looking at
is one of the rails coming from your power supply. A loose
connector, oxidized connector, or bad power supply can do it.

Some motherboards are notorious for these kinds of problems,
while others seem to pass their whole lives without a peep.
I have a board that draws 14A through the 3.3V rail, and
I've never ever seen reports of low readings on 3.3V
for that model. Which suggests there may be something in the
design of the board itself (not enough copper to carry
the current flow), which are aiding these kinds of problems
to show up. All you can do, is make sure the main power connector
is fully seated, and the pins are still shiny, for
best results.

I had a piece of equipment with oxidized pins (the shine was
gone and there was a white film), and I must have taken that
thing apart about four times, cleaned it and "fixed it". Only
to have it complain later. I got fed up one day, and
just soldered the power supply right to the PCB :-)
With no connectors present, it was "fixed" and
never complained again. I hope no one has to replace
the supply in it some day :-) That is an example of
what happens when you're frustrated and in a hurry.

Paul
 
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