Skylake 6700K Overclocking & Voltages Guide

crasherkid · 26 Dec 2015 at 18:44

Hi,
I've previously had a few rigs powered by a 4790k/5930k and more recently a 5820k.
On these chips it was a case of upping the multiplier to whatever ratio (eg x46 for 4.6GHz) and manually applying cpu vcore in small increments then test stability using Aida64 or Realbench etc.

My new system is running a Skylake based 6700k but the overclocking settings are a little different.
I see many options under the voltages menu saying "Offset", there's actually 3 different settings that say offset.
Also, I noticed at idle, (using CPU-Z) my vcore fluctuates from as low as 1.056>1.256 and sometimes up to 1.32v!!!!
Is this normal?? Why such big fluctuations?
Is there any way I can keep the vcore static so it's constantly at 1.275v?
Also, with Skylake is it true that the CPU needs a lot more vcore than Haswell?
I've seen some reviews online which state that the vcore was pushed all the way upto 1.4v?
Any help in this area would be much appreciated.
PS - Mobo is MSI Z170 M7/2x8GB Ripjaws V 2666MHz.
Thanks in advance.

crasherkid · 28 Dec 2015 at 20:08

new boy · 28 Dec 2015 at 20:28

I see many options under the voltages menu saying "Offset", there's actually 3 different settings that say offset.

Offset = +/- from stock

If vcore is 1.3 full load at stock, and you add +0.1v, offset, you will get 1.4v at load. The advantage is that instead of running 1.4v all the time, it will lower the voltage at idle and just add the 0.1v to what the CPU would normally run at idle instead of running 1.4v all the time.

So if at stock, load = 1.3v and idle 1.0v, then with a 0.1v offset you will get 1.4v load and 1.1v idle

There will be other voltage settings you an run an offset voltage on such as vring (cache) etc.

Also, I noticed at idle, (using CPU-Z) my vcore fluctuates from as low as 1.056>1.256 and sometimes up to 1.32v!!!!
Is this normal?? Why such big fluctuations?
Is there any way I can keep the vcore static so it's constantly at 1.275v?

Don't use offset voltage if you dont want the voltage to fluctuate. though you will still have to ballance vdroop (voltage dropping under load) with LLC (which counteracts vdroop, but will overshoot if set too high)

Also, with Skylake is it true that the CPU needs a lot more vcore than Haswell?

Yes, I think its because the VRMs that were put onto the PCB of the haswell chips were taken off and put back onto the motherboard again?

I've seen some reviews online which state that the vcore was pushed all the way upto 1.4v?

Yeah, people are seemingly pretty happy to pump these skylake chips full of vcore. I dont own a skylake CPU, so I've not been paying particulary close attention though to be honest

Thats about the best I can do, hope it answered some of your questions.

kayomani · 28 Dec 2015 at 20:38

crasherkid said:
1.32v!!!!.

Anything <1.4 is fine if you have the cooling, my thirsty core requires 1.39 :F

Altikriti · 28 Dec 2015 at 23:33

Managed 4.8 at 1.35V