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cpu fan and cpu over voltage error with NO overclocking

I've had the cpu fan error for a while but a quick reboot would fix that... lately I've been having trouble with over voltage and the cpu fan error... I've cleared cmos and that didn't help.. there is no over clock applied to the system and I'm just at a loss right now. The cpu fan probably spins at 50-100rpm.

Here is the error
http://i.imgur.com/yGx2j3h.jpg

Here is my bios setting
http://i.imgur.com/GopaTdF.jpg

I have an FX 8350 processor on the Asus cross hair v formula motherboard .. cpu fan is the fan that comes with the cryorig h7 heatsink. Power supply is an atx 1600w psu
Reply to Swazzie
10 answers Last reply Best Answer
More about cpu fan cpu voltage error overclocking
  1. I'm no AMD expert, but I'm pretty sure 3V through the CPU will make it explode. So I doubt that is a true figure.

    Is the fan spinning? What are the CPU temperatures?
    Reply to Eximo
  2. Yes the fans are spinning, just at a very low rate. The cpu temp when I boot up and leave it in the bios for a minute (because that's the only place I can get) it stays around 37c
    Reply to Swazzie
  3. Are you saying the computer won't successfully boot?
    Reply to Eximo
  4. It stays on the error screen, won't go any further
    Reply to Swazzie
  5. Well, for the CPU fan error step one is make sure it is plugged into a CPU fan header. If it is no longer reading correctly that could cause that. Most BIOS have an ignore CPU fan warning option.

    As for the voltage. since 3V will toast any contemporary CPU, you can try changing it something reasonable, like 1.4 volts.

    Though for this I would try to reset the BIOS or update it, hoping it is a software glitch.

    It could be the early signs of a much more serious hardware failure, but the thing with computers is they either work or don't. When they behave strangely you are on shaky ground.
    Reply to Eximo
  6. Cpu fan is plugged into a Cpu header, I've already tried setting the voltage to a static 1.38v (the default for the cpu) but still showed 3v... the bios is on its current updates... only thing I can think of is faulty hardware... what could be the most logical? Power supply due to spiking voltages?
    Reply to Swazzie
  7. A shunt or a resistor divider failing could cause sensor failures, bad capacitor somewhere. Just not really user serviceable.

    What does the system health say about the voltages coming from the supply? If those are out of whack that could easily be the core problem, all bad sensors or a faulty power supply. You can manually check the power coming from the supply with a volt meter (12V, 5V, 3.3), but I doubt it will be easy to measure the voltage actually going to the CPU.

    I have quite a bit of experience with electronics and I would be wary of measuring even with a 10 MOhm meter across the VRMs. (Which, at least for Intel, wouldn't be the core voltage, only the voltage supplied to the CPU's VRMs, though if less then 3V it would certainly point towards bad sensors.

    I once had a CPU with an internal short to ground. That caused it to eat current and cause massive voltage droop. Still worked though, even at borderline meltdown temperatures. Power supply failed first, then the ATX connector, and after repairing that, the second power supply blew. CPU was still working after all that.
    Reply to Eximo
  8. How could I check the system health of the current? Just test the power supply with a volt meter?
    Reply to Swazzie
  9. Best answer
    Not really an easy way to measure current. Most multi-meters could do this, but you have to put the meter in the circuit. Without re-wiring this isn't possible on the power supply side, and next to impossible anywhere else.
    Reply to Eximo
  10. Eximo said:
    Not really an easy way to measure current. Most multi-meters could do this, but you have to put the meter in the circuit. Without re-wiring this isn't possible on the power supply side, and next to impossible anywhere else.


    You could use a current clamp...
    Reply to zhengtianxi
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