Always get a boot failure when trying to OC my i7-6700 (non-K) CPU

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behmer147

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Jan 26, 2017
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I'm trying to play around with overclocking my i7-6700 (non-K) processor and get a boot failure every time I change the base clock.

I followed this guide:
http://overclocking.guide/gigabyte-z170-non-k-overclocking-guide/

I have a Gigabyte Z170XP-SLI MB and have the F6e bios version that it recommends.

After following the guide, I get a boot failure every time I change the base clock speed above 104ish MHz.

Any idea why the step-by-step guide doesn't work for me?
 
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breek

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Jan 4, 2013
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Hello Behmer. I'll do my best to help you out here. Can you tell me when exactly it crashes and if there are any beeps? One beep? Many beeps? Long beeps? Short beeps?

Before overclocking, did you make sure everything runs well? One thing you can try is leaving only 1 stick of ram in (this could require trial and error if you need to find the right slot). Assuming this does not fix the problem, the next step would be to check your BIOS settings. Have you double checked your LLC is set to high/ultra? Have you adjusted your voltage from auto to manual? Have you tried upping the voltage to 1.325 or 1.35v? Make sure you're adjusting your RAM multipler as well. Let me know.

Keelin, to dispel any misinformation, non-k Skylake CPUs can be overclocked with the proper BIOS. You're required to install an older version that allows a separate baseclock for your CPU and RAM from the rest of the system. This is what the OP is referring to and what I have done with my i5 6400 @ 4.5Ghz on Gigabyte's Z170x G1 Gaming 3 board.
 
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behmer147

Commendable
Jan 26, 2017
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Hi breek, Thanks for the reply.  I don't get any beeps during the boot up.  I see the GIGABYTE screen for a few seconds where you would push DEL or one of the F#'s to open the bios or boot menu, and then the next screen is the boot failure screen. 

My system runs just fine without trying to OC, it's about 6 months old and hasn't had any problems, just interested in trying to play around with the clock. 

I do have the LLC set to high (the only options are high, standard and auto). As for the voltage setting, I just changed the CPU vCore voltage from Auto to 1.35 V. I've tried changing just the voltage and when I boot up the system and open CPU-Z I can see that with only a voltage change, it does apply the 1.35 V constantly to the system. Is this what you mean changing voltage from auto to manual? there's no option for me to actually have anything say the word "manual." I also have checked the RAM multiplier to make sure it's still at a value around 2500 MHz when applying the OC.

So far I've tried everything you suggested except removing some RAM so I'll give that a shot.
 
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breek

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Jan 4, 2013
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Behmer, it sounds like you've taken the right steps so far. When I said setting the voltage from auto to manual I meant to set it to a specific value so you have done that correctly.

I did have a few issues with my OC as well. Took some trial and error to get it going so I hope I can be of help. I assume that motherboard supports BIOS screenshotting, so if you can, please upload some pictures of your CPU voltage page, CPU frequency page (this may also include RAM) and your RAM/memory frequency page. If applicable, is an XMP profile enabled for your RAM?

Another question I should have asked already, what BCLK and multipliers are you pushing to? Also, what are the stock CPU frequency values; 100mhz x 33? What I would try is putting your CPU voltage to 1.325v, 33 multiplier, and ~130Mhz BCLK. Play around with that; moving up and down 5-10Mhz at a time and let me know how it goes. As per usual, keep an eye on your RAM and adjust the multiplier as required.
 
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