Asus mobo reads 3.3 volt way low

March 29, 2009 at 08:15:19
Specs: Windows XP
Hi I have a strange problem with my system.
Asus probe is giving warning at 3.3 volt. Its showing 2.54v. I checked from the BIOS and its also showing 2.5-2.7 volt.

I thought its a PSU issue and bought a new CoolerMaster 600W, but still the same issue.

I would appreciate any help.

AMD Athlon X2 3800+
Coolermaster Extreme Power Plus 600W

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March 29, 2009 at 14:53:12
Might the bios have a setting to increase or decrease voltage somewhere?

"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10

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March 29, 2009 at 15:31:35
If two different monitors give identically incorrect readings you can take it that is is most likely to be the motherboard censors that are giving false information. If everything works ignore it an remember that the 3.3V censor tends to read a little low.


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March 30, 2009 at 04:25:21
Thanks..Everything seems to work fine though.

Also tried to update the BIOS and it shows the latest one as per ASUS site.

Last month the I had the same problem and I ignored. But after that the CPU stopped working and I had to get an replacement from AMD. So this time I am a little shaky!!

Can a low 3.3 volt cause a CPU damage??

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Related Solutions

March 30, 2009 at 05:52:29
I wouldn't worry about low voltage affecting the CPU. Most modern CPUs operate on voltages down to around 2V and there is a separate voltage regulator on the motherboard to reduce the 3.3v to the required voltage.

This is the voltage that is controlled by the BIOS, not the output from the power supply which the voltage censor is measuring.

For it to be a problem for the CPU it the 3.3v rail would have to drop down to 2V and before it started affecting the CPU is would be causing problems with the memory which also uses 3.3 v.

Low voltage on the CPU wouldn't do it any harm, just make it very unstable.


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March 30, 2009 at 06:34:51
Thanks Stuart..for giving me some confidence..this is the first time I am using a ASUS board and somehow I am not very happy with it. What is ur feedback on ASUS boards??

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