Z490 New bios with new feature OCTVB

[RobertoSampaio]

lets say the cpu's native vid at 53x its highest boost freq is 1.53v
lets say your configure such that the highest core freq for light loads is 54x.
lets say you set an adaptive voltage of 1.55v
lets say vf pt 7's original vid is 1.49v
lets say no offsets applied to vf7/8
so when cpu goes 54x, the 1.55v setting will get honored.
the resultant vid request/voltage received is also affected by a whole slew of other factors such as (acdc LL/svid behavior, tvb voltage opt if enabled, vrm LL) but those need to be dealt with seperately in order not to complicate the example.

in same example just changing 1.55v value to 1.5v value:
when cpu goes 54x, the 1.5v setting does not get honored then due to it being lower than its native 1.53v

then u do an offset of -30mv to vf8
so when u run 54x, 1.5v (which is 1.53v - 30mv and not your setting of 1.5v-30mv in this case, always bear in mind trying to set adaptive lower than native volt is futile, this is a key point in understanding its behavior) is achieved because negative offsets work regardless of native vid as long as the vf curve remains monotonic, ie, always increasing/at very least constant. 1.5v is higher than the point before it, vf7 which is 1.49v which has no offset v set at the moment.

then u decide to add an offset to vf7 , say 40mv. thus vf7's resultant v is 1.49+40mv=1.53v. then now even though u did nothing to vf8, it is no longer 1.5v when at 54x but 1.53v to keep the vf curve monotonic.

so to understand adaptive voltage, always bear in mind:
voltage settings can only take effect if freq is > default boost and volt is > default vid
anything else is futile
that is where vf pt offset comes in, when u cannot do it by adaptive v setting as above, then u do it by vf pt offset, bearing in mind it's monotonic behavior.

Tx Shamino !!!
I think I understood ...

So which is the better choice for the higher frequency?
Pump up V/F8 or add voltage thru adaptive offset?

I'm trying 54x3, 53x5, 52x8, 51x10 +1boost

5100MHz - V/F6=1.329 (+0.016) = 1.345v
5200MHz - V/F7=1.329 (+0.031) = 1.360v
5500MHz - V/F8=1.428 (+0.032) = 1.460v
Adaptive = 1.480v

So the results should be:

5100MHz - VID ~ 1.345v
5200MHz - VID ~ 1.360v
5300MHz - VID ~ 1.410v
5400MHz - VID ~ 1.445v
5500MHz - VID ~1.480v

Is it?

[geneo]

It seems it would be simpler if the adaptive mode's additional turbo voltage (ATV) were independent of the VF curve - that is, VF8 stuck at the native turbo multiplier and only ATV affected the maximum multiplier (above the native turbo). Then you would want the voltage for maximum multiplier to be the maximum of Vf8 (native turbo) and ATV.

For instance, I have a VF curve that is stable at 51x all-core. When I do a OCTVB+1 @ 52x on my 10700k, it drags VF8 to 52x. Since the VF is monotonic increasing, this means 51x is going to run at a lower voltage now instead of VF8+offset since it is interpolated. My OC is unstable not because of the 52x voltage, but because 51x is now running at a lower voltage, So I have to diddle with VF7 and VF8 to get 51x stable again in a non-optimal way. If the VF8 point stuck to 51x, then I would set the voltage I want for 52x via ATV and not have to tangle with the VF curve (ever again)

You must see some down side to this suggestion?

BTW, thanks for posting the tool for manipulating OCTVB, it is very useful for tuning without having to do constant reboots (which I am doing right now).


EDIT: I think what I am suggesting is the way adaptive used to work before the VF curve was exposed for editing.

[Betroz]

Have any of you guys tried Auto vcore when using this OCTVB feature?

[Shamino]

Tx Shamino !!!
I think I understood ...

So which is the better choice for the higher frequency?
Pump up V/F8 or add voltage thru adaptive offset?

I'm trying 54x3, 53x5, 52x8, 51x10 +1boost

5100MHz - V/F6=1.329 (+0.016) = 1.345v
5200MHz - V/F7=1.329 (+0.031) = 1.360v
5500MHz - V/F8=1.428 (+0.032) = 1.460v
Adaptive = 1.480v

So the results should be:

5100MHz - VID ~ 1.345v
5200MHz - VID ~ 1.360v
5300MHz - VID ~ 1.410v
5400MHz - VID ~ 1.445v
5500MHz - VID ~1.480v

Is it?

Theres no better way , just which way is easiest, typically just use adaptive volt for the oc part and vfpt for below this, but can do it together for specific reasons anyway, use it to suit your target.

Your example, 54 and 55 will both be 1.48 as youve set adaptive voltage of 1.48 and it carries for any freq > 53x. To get what you wrote simply set down the adaptive to 1.36v (since vf7 is 136, you're basically nullifying adaptive so that you rely on vf offset entirely)or so, and set vf 8 to 1.48-1.36 = 0.12 this will give wgat you propse with 54x v interpolated between 53x vid and 1.48
Only vf pt can give u the interpolation, adaptive v by itself can't

[Shamino]

It seems it would be simpler if the adaptive mode's additional turbo voltage (ATV) were independent of the VF curve - that is, VF8 stuck at the native turbo multiplier and only ATV affected the maximum multiplier (above the native turbo). Then you would want the voltage for maximum multiplier to be the maximum of Vf8 (native turbo) and ATV.

For instance, I have a VF curve that is stable at 51x all-core. When I do a OCTVB+1 @ 52x on my 10700k, it drags VF8 to 52x. Since the VF is monotonic increasing, this means 51x is going to run at a lower voltage now instead of VF8+offset since it is interpolated. My OC is unstable not because of the 52x voltage, but because 51x is now running at a lower voltage, So I have to diddle with VF7 and VF8 to get 51x stable again in a non-optimal way. If the VF8 point stuck to 51x, then I would set the voltage I want for 52x via ATV and not have to tangle with the VF curve (ever again)

You must see some down side to this suggestion?

BTW, thanks for posting the tool for manipulating OCTVB, it is very useful for tuning without having to do constant reboots (which I am doing right now).


EDIT: I think what I am suggesting is the way adaptive used to work before the VF curve was exposed for editing.

Vf pt addition never changed how adaptive works. It seems like intel firmware engineers take precautionary measures to ensure what is deemed illogical doesnt take place, hence all these conditions yhat need to be fulfilled before taking effect, but it certainly narrows down your options at times

[RobertoSampaio]

Vf pt addition never changed how adaptive works. It seems like intel firmware engineers take precautionary measures to ensure what is deemed illogical doesnt take place, hence all these conditions yhat need to be fulfilled before taking effect, but it certainly narrows down your options at times

Any frequency above 53x use the adaptive! If it is higher than V/F... This is from intel project...
Now I understood!
is it Right?

[gogo974]

HELLO
I give you screenshot I use the bios 901 with AI OPTIMISER

[gogo974]

Hello

[Shamino]

Any frequency above 53x use the adaptive! If it is higher than V/F... This is from intel project...
Now I understood!
is it Right?

Adaptive plus vf8 if vf8 is not 0 offset

[RobertoSampaio]

Adaptive plus vf8 if vf8 is not 0 offset

In this example


5100MHz - V/F6=1.329 (+0.016) = 1.345v
5200MHz - V/F7=1.329 (+0.031) = 1.360v
5500MHz - V/F8=1.428 (+0.032) = 1.460v
Adaptive = 1.480v

Which VID will be 5300MHz?