Simple question about adaptive voltage

Makentox · Jan 25, 2017

So simple question what is the difference between 1.2+0.1=1.3v and 1.3 + 0.0 = 1.3v
At the end it still the same 1.3v under full load.
What offset do u prefer? Have u noticed any stability difference with or without offset?

They say there are no stupid questions, only stupid answers.

Eximo · Jan 25, 2017

A voltage with no offset is a constant voltage?

What motherboard and CPU?

Makentox · Jan 25, 2017

Eximo :

Well it doesnt really matter what mobo and cpu it was just "overall" question that works for any motherboard.
Asus z170-a and i7- 6700k

I try to explain it to you. In bios when overclocking desired voltage for your cpu speed u can choose between manual, offset, adaptive.
I choose adaptive mode to make voltage scale depending on cpu speed and how much voltage it needs to keep frequency up.

Eximo · Jan 25, 2017

Actually extremely relevant to the discussion since voltages will vary completely on chip type, your target frequency, and the maximum voltage your cooling can handle. Depending on the circumstances I might suggest something else.

And every motherboard manufacturer uses slightly different terms. ASUS I am pretty familiar with for Haswell systems, not so much Skylake.

Adaptive voltage appears to add to the core voltage when the stock multiplier is exceeded. So it is essentially setting the maximum voltage you will see. 1.3+0.1 will be 1.4 when the multiplier exceeds 42 (assuming 100Mhz BCLK)

Offset voltages increase the voltage range of the CPU at all multipliers. You typically use this when you want power saving features to operate.

Makentox · Jan 25, 2017

Well there is still something wrong guess my english is not good enough to explain, i was looking for it all over the internet but cant find an answer for the question. Imagine, you need voltage to keep your clock stable, so you add voltage in bios. In my case i were able to keep clock stable @ 4.6GHZ feeding 1.275 v.
I dont have any issue with stability i just wanted to understand what the point of offset in adaptive mode. My settings in adaptive voltage mode are 1.250 + 0.025 v offset which makes total voltage on 100% load rise to 1.275v. I have tried to make it 1.220 + 0.055v or 1.275+0.000 no matter what i set as long as i get total voltage of 1.275, my clock speed is stable.
I totally understand how manual and offset mode works with values u set, but only adaptive mode is not clear. Exactly what offset in adaptive mode does.
I guess thinking logically offset in adaptive mode just add this offset value when is not 100% load.
For example if i have 1.275v+0.0v offset while 50% cpu load it takes 1.020v.
If i have 1.250 + 0.025 then when cpu on 50% load it takes 1.045v.
Probably im wrong but want to know what offset exactly does in adaptive mode voltage control.
Well it may have something to do with power saving features. Or at least want to know what are pros or cons of having offset in adaptive mode then

Eximo · Jan 25, 2017

I don't think there is a point to using Offset with Adaptive mode. If you are using Offset mode you will increase the voltage at all points in the CPU's range. If you use adaptive, you are only increasing it at the top end when the CPU is loaded. If you use both, I imagine the top of the voltage/frequency curve would stay the same, but the rest would increase with the offset value.

Makentox · Jan 25, 2017

Eximo :

Yeah this was nice thought.

Eximo · Jan 25, 2017

Something like this:

Stock ||| Offset +.025 ||| Adaptive +0.1 ||| Offset and Adaptive

1Ghz .7 | .725 | .7 | .725
2Ghz .8 | .825 | .8 | .825
3Ghz .9 | .925 | .9 | .925
4Ghz 1.2 | 1.225 | 1.2 | 1.225
4.5Ghz Max(Vcore) | Max+.025 | 1.3 | 1.3

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Simple question about adaptive voltage

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