CPU voltage seems to be overridden

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Kill3rCat

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Aug 23, 2016
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Relevant components:
i7 6700k @ 4.6 GHz (CPU, overclocked)
ASUS Maximus VIII Hero (motherboard)

I set voltage to manual at 1.32v in the mobo UEFI BIOS, and yet in HWMonitor I am seeing peak CPU voltages up to 1.435v. Any ideas why?
 
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Kill3rCat

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Aug 23, 2016
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No, I was looking at VID.
6299aab39d.png


Edit: If you're not familiar with HWMonitor, the values from left to right are:

current value --- min measured value --- max measured value
 
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Themastererr

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May 22, 2016
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Yes, I use HW monitor on a daily basis.

Check BIOS settings to make sure they reflect a stock setup. Load optimized defaults if you don't know what you're doing.
 
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Themastererr

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May 22, 2016
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A setup that the motherboard and CPU chose upon first start up, not what the user decided on. Using the "load optimized defaults" in the BIOS is the easiest way to do this.
 
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Themastererr

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May 22, 2016
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Yes.. Only to see if the voltages go back to normal. Chances are you changed something that is allowing it to spike.
 
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Themastererr

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May 22, 2016
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Load line calibrations are the main culprit. They control a strict % of voltage that can be applied.

A.I overclocking options that most motherboards have do this as well.
 
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Themastererr

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May 22, 2016
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To make sure your system stays stable.

Look in your exit screen of the BIOS. "load optimized defaults"

 
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Kill3rCat

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Aug 23, 2016
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Ok, I'll try that. Would you recommend a manual overclock after ensuring my voltages are within safe bounds?

On a side note: I'm having a seemingly erroneous POST message about CPU fan speed errors... can we discuss that here, or shall I make a new thread for it?
 
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Themastererr

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May 22, 2016
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I just built a friends rig last week that uses the exact same CPU and motherboard lol..He used the ASUS A.I software to overclock his rig to 4.7. Just one mouse click. Pretty cool if you're not combortable screwing around with the BIOS.

Normally I don't recommend software overclocking, but the A.I suite from ASUS is not too bad.

In regards to the fan do you use a liquid cooling setup? If so you still need to have your CPU fan header plugged in. If you don't, and your header is plugged in, either the fan is actually having issues or the motherboard is having an issue controlling it. With new components the latter is unlikely.
 
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Kill3rCat

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I've got to go out for a while. I appreciate your help, but I won't be able to reply for a few hours.

And yes, I am using a Corsair H110i GTX liquid cooler. The two cooler fans are connected to connectors which fork off a main header. That header is the pump header, it's a 3-pin which goes from the pump (which rests above the CPU) to the CPU_FAN header.
 
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Kill3rCat

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Aug 23, 2016
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I reset to 'optimised defaults', and proceeded to change ONLY the voltage and ratio:

Voltage --> Manual (1.32V)
Core ratio (all cores) --> 44 (up from 40)

The voltage is still fluctuating. Sorry for the delayed response, btw.
 
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Themastererr

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May 22, 2016
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Interestering. The VRM's could be damaged at this point of the voltage is still fluctuating. Can you confirm this is the voltage in the BIOS as well?

I'm wondering if Hwmonitor is giving us a false reading.
 
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Kill3rCat

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Aug 23, 2016
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It's possible. Are there any other settings in the BIOS which could affect voltage?

And in the BIOS, I believe I did observe voltage fluctuations when I booted this morning (I have to go into the BIOS and then exit to bypass the 'CPU fan speed error' that pops up on POST).
 
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Kill3rCat

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Aug 23, 2016
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Well, just had quite the scare. Tried to manually change a couple other voltage-related settings, in case that was what was causing the voltage spikes.

PC didn't boot... not even to POST.

For some reason the CMOS reset button at the back of my motherboard didn't have any effect - that led me to all kinds of terrifying conclusions; 'did I fry my CPU?', 'did I fry my RAM?', 'did I fry my motherboard?'. Fortunately, I noticed another CMOS reset button inside the case, near the USB headers. Hitting that caused my PC to power on, then a couple seconds later power off again. After another couple seconds of being off, it powered itself on again and booted to BIOS.

PHEW!

I put all the BIOS settings back to how they were before, and rebooted. It would appear that inexplicably there're a few lasting effects, however - for some reason, my PC seems to take twice as long to boot as it should usually, with quite noticable unresponsiveness for the first 5-10 seconds. My OS is located on an SSD - A Samsung 850 EVO, 500 GB to be precise.

Before this whole affair, it booted in half the time, with virtually no unresponsiveness (~1-2 seconds) upon first login. I couldn't think how this could've occurred. Perhaps relevant, is that the first time it booted an error was thrown about RAID configurations, despite the fact that I am not using any RAID configuration. I should note that both my drives (SSD main/OS drive, and HDD storage drive) are recognised seperately and are functioning normally, apart from the fact that the SSD seems slower somehow.

Welp. Quite enough adrenaline for one morning.
 
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