Alder Lake V/F Curve Deep Dive | SB#31

[@s0ulkiller]

Finally I understood what are those voltages for LOL - brilliant ... Glad I finished the whole film with ... the last sentence you said summarizing everything :)

[@SkatterBencher]

Glad you enjoyed it!

[@mamamia5668]

Great video. I finally learnt what some of those voltage settings meant

[@Subclient18]

Very informative video, in conclusion, when try to figure up the adaptive voltage, just focus on a maximum ration for your P-Cores and let the CPU worry about all the other things ))) LIKE

[@hiriotapa1983]

But how do you know that the OC ratio for 55X is 1.45V, and what if you let the CPU automatically decide on the voltage by leaving adaptive voltage on auto? How does the CPU calculate the voltage then? Will it be different from 1.45?

[@efenditiar714]

amazing video. as always

[@SkatterBencher]

Glad you enjoyed it!

[@ondrejsobek6565]

Very nice explanation, though there's something I don't understand. In the 12900K overclocking video you said that VF points 7-10 are a copy of VF point 11. I am running a 12900K on Asus Z690 TUF where I set VF point 6 offset to -0.03V and VF point 11 offset also to -0.03V which in theory should offset every bin between 48x and 53x by -0.03V, am I correct? Because that did not happen - for a frequency of 5.1 Ghz there was effectively no offset and when I went into the UEFI and set VF point 7 to also -0.03V (or even -0.015V for that matter) the computer bricks and does not post for some reason... In the OS I can use Intel XTU to offset -0.08V and it still doesn't crash (at least at first glance). So I am not sure what's going on here - I guess I'll just skip adaptive voltage with offset completely and simply run a fixed allcore frequency with a fixed maximum voltage for that and call it a day.

[@SkatterBencher]

Hi Ondřej, thanks for the feedback. Long story short: I didn't quite get the explanation of the Advanced Voltage Offset feature on Alder Lake correct. I will be addressing this in my next SkatterBencher video where I will discuss it in more detail. Here's the brief notes: (SPOILER ALERT for SkatterBencher #34) For Alder Lake CPUs, there are a total of 11 V/F Points available for the CPU P-cores. Each V/F point is associated with a specific CPU ratio on the voltage frequency curve - V/F Points 1 to 6 are each unique and associated with a ratio below the maximum default turbo ratio. - V/F Point 7 is also unique and is associated with the maximum default turbo ratio (52X for 12900K, 50X for 12700K, 49X for 12600K) - V/F Points 8 to 10 are copies of V/F Point 7 - V/F Point 11 is the final unique point and is associated with the OC Ratio Three notes: 1) OC Ratio = max ratio you configure across all settings; default = max default turbo + 1 (for 12900K that's 52+1=53X). 2) VF Point 7 is mapped to 53X on 12900K/KF, while it should be mapped to 52X according to the rule. This appears to be a remnant of the original intended spec of the ADL-S Core i9 which was to match the 11900K max boost frequency. 3) There are some complexities with programming VF Point 7 due to the "copy-points" 8, 9, and 10. The CPU microcode does not like VF7 to be lower than VF8, so if you want a negative offset on VF7 first you should program VF8 to negative. Usually this is taken care of by motherboard auto-rules, but Z690 seems to be a really tough platform for the motherboard engineers so I’m not sure all boards have the auto-rules implemented. If you want a negative offset for VF7, my suggestion would be try and set VF8 to VF10 to negative (without offset value) pro forma.

[@cptnsx]

@@SkatterBencher I used Intel XTU - which only has VF point 6 and 7 (at least the updated version I have). I set both to -0.100V and it appears to be honoring that on my 12700KF as I tested 4.8, 4.9 and 5.0 all core - in benchmarks. Since I'm air cooled its the only way I could overclock the all core setup while staying below 80C.

[@p1st0ls44]

we dont deserve this kind of overclocking information

[@gecho8848]

First of all great vid, I learned a lot! I also have a quick question for anyone reading who is interested. So I have a 10600k I can run at 5ghz and so far is stable. However at idle it only takes like 10% load for the CPU to go straight to 5ghz. I don't think this is really a problem but I am curious to know if there is a way to tell the CPU not to boost frequency when under a specific load percentage. So like saying if the overall CPU load is less than 30% do not use turbo. That way it would only go to the non boosted 4.1ghz when using chrome or just watching videos, but any actually demanding programs or games would go over that 30% threshold and boost up to 5ghz. Is that possible? Is that already a thing and I've just missed something very obvious? Anyway just curious is all and to my surprise I couldn't find anything just by googling. Thanks for your time!

[@yoltsbp]

My 12700kf gets 5ghz p core and 4ghz e core at 1.27v . @1.37v I can get 5.2ghz p cores and 4.1 ecores at 1.37v. Not sure how that stacks up silicone wise

[@Extreemy]

Are you going to do asus z690 hero with i9 12900k anytime soon?

[@SkatterBencher]

It's not on the plan. I'm currently working on a 12900KF guide with MSI motherboard, then I have planned to do a video on 12900K with Cryo Cooling when it finally becomes available. After that, I might need a couple weeks off to prepare for next-generation platforms ... :)

[@Extreemy]

@@SkatterBencher awww would love to see the "fire" motherboard overclocking lol

[@brandonb56]

@@SkatterBencher would i be able to follow that guide with a 12900k?

[@SkatterBencher]

Yes, the general process will be the same for all motherboards. Of course the terminology in the BIOS might differ from vendor to vendor, so look out for that.

[@KinGDGaminG63]

Man I'm having a hell of a problem getting my dynamic oc with Adaptive voltage stable. Always crashes. Always crashes when system is idle never under load

[@TimMer1981]

Then I suppose you should check the lowest VF point(s), no?

[@doriandodo99]

Great video as always :) Now lets get to 1m views

[@SkatterBencher]

Thanks! :)

[@timeDrapery]

Is it possible to do something similar with AMD Ryzen CPUs / chipsets?

[@SkatterBencher]

Hm good question. I think it's more difficult with AMD CPUs. As you know, on Ryzen CPUs there are two modes: Precision Boost and OC Mode. When Precision Boost is enabled, then manual overclocking is disabled. When you do manual overclocking, then Precision Boost is disabled. I think the only way to get an insight in the V/F curve is via Precision Boost, but the process I use in this video requires me to manually fix the CPU ratio. Doing the same on AMD would enable OC Mode and disable access to the V/F Curve via Precision Boost. I think we can only observe AMD's V/F curve indirectly via monitoring tools. It's basically what I did in these videos: kzbin.info/www/bejne/oIXOdaR3h6mefck & kzbin.info/www/bejne/Z6jGhmuGp8l6gqc

[@Jose-wy3qp]

Waiting for 5ghz i7 12700k in carbon mai z690

[@SkatterBencher]

My video with i7-12700K and Z690 Carbon is already out kzbin.info/www/bejne/mZDGlpVuZ5VjbtU

[@TrueRegulators]

found a use for 2x playback speed

[@fantomddd]

SkatterBencher, please include the translate button in your vidoes.

[@SkatterBencher]

Oh I will have to look into that. Thanks for the tip!