Why do i get CPU over voltage error?

April 25, 2015 at 01:43:35
Specs: Windows 7, Amd Fx 6300
Cpu Over Voltage Error, Press F1 to resume. This message pops up everytime i open my pc. What causes this problem and how can i fix it?
System Specs: Cpu: Amd Fx-6300
Motherboard: Asus M5A78L-M LX3, bios version 1201(latest)
Ram: Kingston HyperX Fure 8gb
Graphiks Card: Asus R7 250X Series 1gb
PSU: ANTEC VP350P 350Watt
I am running on Windows 7 64 bit.
I have been monitoring my system with SpeedFan and the voltages i get are: Vcore1: 2.46v
Vcore2: 2.98v
+3.3V: 2.72v
+5V: 4.41v
+12V: 10,88v
When i check the core voltage with CPU-Z, values change from 0.88V up to 1.6V.
The temperature of the cpu is fine. It doesnt exceed 31oC.

I tried opening the bios and changing the cpu voltage from auto to default as it suggests in some other threads but i cant interract with that option. Also, i am a noob concerning hardware so i want to avoid opening the pc and tinkering with the hardware.

Appreciate any help.


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#1
April 25, 2015 at 05:58:01
You don't see a problem with the reported voltages?? There should be no more than a 5% fluctuation. The better the PSU, the less the fluctuations. According to the following review, the VP350P has "tight voltage regulation on +12V and below 3% for the minor rails". But the numbers you posted are no where near that:

+3.3v : 2.72v = 17.6% undervolted
+5v : 4.41v = 11.8% undervolted
+12v : 10.88v = 9.3% undervolted

http://www.techpowerup.com/reviews/...

And the reported CPU voltages are WAY over what they should be, at least in SpeedFan. The CPUZ readings seem to be in the ballpark. I don't know if it's just a software glitch or what? The CPU voltage is supposed to fluctuate based on load but it should be between 0.90v & 1.425v. Here's the breakdown:

Boost States:
#1: 4100 MHz, 1.425V
#2: 3800 MHz, 1.4125V
Low Power States:
#1: 3000 MHz, 1.225V
#2: 2500 MHz, 1.125V
#3: 2000 MHz, 1.025V
#4: 1400 MHz, 0.9V

http://www.cpu-world.com/CPUs/Bulld...


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#2
April 25, 2015 at 09:09:37
So what can i do to fix this? Replace the motherboard? Replace the psu?

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#3
April 25, 2015 at 11:14:02
I would recommend you verify those Speed fan numbers are accurate. I have found HWMonitor to be more accurate. Get it from the link below.

Also, verify you have the latest version of speed fan.

Sounds like you power supply may not be supplying the correct voltages. Sometimes the sensors on the board can send incorrect data, but all the rails are off. That is probably not sensor error.

http://download.cnet.com/HWMonitor/...

message edited by OtheHill


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Related Solutions

#4
April 25, 2015 at 16:27:18
Verify the numbers with HWMonitor or in BIOS set up but it does look like the power supply will need replacing.

You have to be a little bit crazy to keep you from going insane.


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#5
April 25, 2015 at 17:19:53
On my system the HWMonitor is completely off in all readings. I would rely on the BIOS readings

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#6
April 25, 2015 at 18:52:08
Sluc

You may need to update your version of HWMonitor. Sensors on board the motherboard change. Your board may not be configuring right.

BIOS will only show voltages at idle. The PSU is still working but not necessarily correctly. Latest version is 1.27.0.


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#7
April 26, 2015 at 09:00:18
Reading from HWMonitor:
CPU Vcore: around 0.8 to 1.2
VIN1: 2.232
+3.3V: 2.040
+5V: 3.306
+12V: 8.160
-12v: -8.064
-5V: -5.856
+5V VCCH: 3.125
VBAT: 1.632

Where can i find the voltages in the bios. When i tried to change the voltage settings there i couldnt interact with any of the options for some reason.

Thanks


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#8
April 26, 2015 at 13:59:22
Running with those voltages may ruin your hardware. Best to change out the PSU. You may still have warranty on the current PSU.

Kind of strange that the voltages are that far off spec and the computer is still running OK.

edit

Look under PC Health

message edited by OtheHill


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#9
April 26, 2015 at 19:47:25
@ Othehill
I used the latest version of the HWMonitor on ASUS MB. Still no change.
Using the ASUS Probe (Windows) tool it shows correct (as in BIOS).

HWMonitor may work on some motherboards, not on all.

Are you sure while in BIOS your CPU is in IDLE?? Check out your TEMP while in BIOS for some time.

message edited by sluc


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#10
April 26, 2015 at 20:23:28
I also have always had strange readings for voltages on HWMonitor for my newer Z97 Gigabyte MB and I am up to date on HWMonitor (1.27.0) though on prior older MB's I have been able to rely on the voltages, apparently we cannot rely on these numbers on the new chipsets.

You have to be a little bit crazy to keep you from going insane.


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#11
April 30, 2015 at 03:23:13
Thanks for your help guys. I will probably take the pc for service as soon as possible and request them to check the connections and if needed replace the psu.

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