Need help with my overclock (i7 8700k)

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silvanplss

May 31, 2018
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Hello dear Tommunity.

I have some problems while overclocking my i7 8700k.
The highest I can get is 4.7GHz at 1.3V. That is pretty high for an 8700k, other people get 5GHz at 1.29V.
Did I do something wrong in the UEFI-BIOS ?
I set: Multiplier on 47 = 4.7GHZ, VCore Voltage on 1.3V and the Internal Loadline Calibaration on Extreme. And I turned on XPM.

Is my CPU just bad (Silicone Lottery), is it my Mainboard, or is it just me?
I have the Z370 Aorus Ultra Gaming. I heard a lot of bad reviews from der8auer, OC3D and more about overclocking and stability and I wonder if that may be the problem.

I even delided my CPU yesterday, hoping that it would fix it by lowering thermals. I have around 50°C-60°C before it crashes.
 
Solution
vMax
Getting the ofset right is not easy as you need to know what the base vcore is first...So if it is 1.3 then an ofset of0.02 will move it up to a max of 1.302 etc... but you need to get where the vcore is at the beginning. If it is topping out at 1.5 then use a minus ofset of around minus - 0.70v and see if the true reading is 1.43 and keep working your way down.
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What CPU Cooler are you using? You should be getting better even with the Ultra Gaming!!! reset Bios to defaults, set multiplyer to 48, change vore to 1.325v and LLC to Turbo...Let me know if that works at all, then you can lower vcore to see if it hold stability.
 
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Thanks for your help. But No...
I resetet the BIOS to the optimized standarts, set multiplyer to 48, changed vore to 1.325v (I even tried 1.33V) and LLC to Turbo. Just like you said.
OCCT gave me the an Error 3 times. One time ERROR on Core#0 (and the loud quack-noise scared tf out of me ... ^^)
And Aida64 gave me an blue-screen after 3:00, 2:24 and 3:01min. Everytime there was an other error code.
At OCCT I just kept everything on default and just clicked start.
In AIDA64 I stressed the CPU, FPU, cache and system memory.

Should I go higher than 1.33V just for 4.8GHz ??

But thanks for you help :)
 
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Hi, what CPU cooler are you using?

With regards to going higher, you can go all the way to 1.4v as others do but I personally will never go over 1.35v...thats my limit!!! To scared to go higher.

Not sure what is going on but could be motherboard or not the best 8600K...still you should get 4.7 at least...

I hope someone else can jump in and help..
 
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Sry ... i forgot that. I have the Corsair H115i. (280mm AiO)
Yes, with my luck I probably got the worst 8700k possible. (And now that I delided it I will have no chance for a replacement ... )
I will try 1.35V on 4,8GHz with LLC Turbo (or is Performance higher?) later. I get stable 4.7GHz on 1.3V ... -_-

Or if it is the Mainboard I could try to keep an eye on sales and maybe try to grab an Asus Maximus Hero is something.
 
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Thanks for your help again ... but I am still a bit frustrated with my Hardware ...
 
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Just thought of something but have you tried adaptive mode or ofsett mode for the overclock?
 
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No ... never heard about that tbh. What is that ?

Btw. I tried 1.35V and even that didn't work.
 
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You NEED to put your CPU VCORE TO 'NORMAL' type in norm then press enter before Gigabyte's dynamic vcore unlocks.. so you can put an offset with +- keys. start with a fairly low ofset like +0.20 on a 4.6GHZ make sure you have Core temp or Hardware Info running so that you can see how much vcore you are using at load...then you can add or minus the ofset..

But please read up on this...
 
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So ... I read some threads about offset Overclock...
I did set the offset to +0.2, Aida showed me 1.5V under load, my CPU was instantaneously on 80°C adnd after 20sec on 95°C and throttled then.
I stoped the stress-test, because 1.5V are to much anyway in my opinion, and I dont want a thermal throtteling cpu.
But I will try with +0.1V or something.
 
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Getting the ofset right is not easy as you need to know what the base vcore is first...So if it is 1.3 then an ofset of0.02 will move it up to a max of 1.302 etc... but you need to get where the vcore is at the beginning. If it is topping out at 1.5 then use a minus ofset of around minus - 0.70v and see if the true reading is 1.43 and keep working your way down.
 
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Solution


This helped for now ... I get 4.8GHz on with an offset of +0.035V.
Thank you :) It is more or less stable after 10min.
 
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