Manual Vcore vs adaptive Vcore - i7 7700k - 1.38V

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overdriver_pt83

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Aug 11, 2017
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Hi all!
Maybe this question was already asked a bunch of times but I keep my doubts when talking about Vcore near 1.4V.

My build:

Asus z270m prime
I7 7700k (delidded)
Kraken X42
Gigabyte GTX 1060 6GB WF OC
Crucial ballistix sport 32GB DDR4 2400Mhz
Corsair VS650

I have been having issues with my OC. After delidded my CPU and installing a Kraken X42 I'm able to OC my CPU to 5Ghz @ 1.38Vcore (Bios) 1.39V ( SW readings). System is stable, no issues when using constant Vcore with manual settings.

When trying to use adaptive Vcore with negative offset, I get BSOD now and then or total feeze when gaming or using demanding software like audio DAW (Cubase)
LLC is set to level 5

My question is:

Being a litlle bit tired of not getting a stable adaptive OC, will manual 1.38Vcore damage my CPU on the long run? Is it posible that maintaining this setup will make the OC unstable over time, or is totally fine and I shouldnt worry and even try 1.4V constant and maybe 5.1 Ghz? :) This last part is a bit greedy, I know.

Thank you all!!

Regards,

Luís
 
Solution
Finstar
I don't know about the max recommended vcore for kaby lake but i think under 1.4 constant should be fine for long run. And yes, i would avoid using the adaptive oc since i was just looking at a post where an Asus board might have fried a cpu because if it.
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Finstar

Finstar

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I don't know about the max recommended vcore for kaby lake but i think under 1.4 constant should be fine for long run. And yes, i would avoid using the adaptive oc since i was just looking at a post where an Asus board might have fried a cpu because if it.
 
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mdd1963

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Jan 14, 2006
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Possibly adaptive is not changing the voltage quite fast enough for stability if the clocks ramp are that high...; I'd choose a slightly lower fixed vcore, and as clock high as you can get off of 1.3 V or 1.32 or so, whatever temps you are comfortable with.
 
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overdriver_pt83

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Aug 11, 2017
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Thank you for the info!! Got to be carefull then. :)
 
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overdriver_pt83

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Aug 11, 2017
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Thanks! I'm going to try it then. If I remember correctly, I cant get a stable OC @ 5Ghz under 1.38V. Anyway I'm going to set it up again and try a lower vcore.
 
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overdriver_pt83

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Aug 11, 2017
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The thing is, on both setups it's stable on prime95, realbench, cinebench and a few more. But, when in adaptive, from time to time it simply crashes.. Even when not on full load.

An example, the last few times I had a BSOD or total freeze, I could run 15min or more of prime95 small fft or realbench but had random crashes using the menus on BF1 or playing or even opening a new, empty session on cubase... it dosent make sense, there seems to be something wrong with adaptive vcore.

Thanks
 
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overdriver_pt83

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Aug 11, 2017
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Yes, that is correct. I remember testing Ocing the CPU to 4.9Ghz required much less voltage, something around 1.32V or even less.

The thing is that I'm able to get 5Ghz under 1.4V and temps under 70C after the delid (not in prime 95 of course :) Any AVX stress test goes up to between 75 to 77C).

Thanks!
 
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