Undervolting with AC/DC LL query

[0121danwilliams84]

Hi all.

I am a bit confused about the difference between changing LLC levels (such as 1-8) and undervolting via AC/DC LL.

If you change from level 3 to 5 for example the ac/dc Loadline seems to go down (1.1 to 0.73) but I imagine that is not undervolting?

Could anyone explain this in basic terms as googling is not getting the answer!

Thanks

 

[0121danwilliams84]

As far as I know LLC is Load Line Calibration and is basically a extra bit of voltage supplied during load to account for the vdroop.

Thanks for the reply. I kind of go that part of it but was interested in how people are undervolting via the AL loadlines rather than a traditional vcore offset.

It is a bit of a tricky thing to explain and understand though I imagine!

 

[0121danwilliams84]

watch buildzoids recent video's
unfortunately, apart from a vague understanding, i cant comment more helpfully.
as for the ac/dc setting on my particular motherboard (asus) i've set them both to "1" with an LLC of 5 . i know from my small experiment that setting a higher ac/dc ll value increased the vcore voltage greatly. the value setting of 1 in my case actually slightly lowered the vcore voltage under stress test loads (so i thought good one! and left it at that)
the default value on my board is "0"

now BZ did an experiment by setting the ac and dc ll values to different values (the boards' bioses usually recommend to set them to identical values)
and this had a notable effect on his vcore voltages (i cannot recall what exactly but this may be related to your original question of manipulating vcore with the ac/dc ll values -see buildzoid's videos )

depending on your specific platform you may wish to reduce the vdroop by setting a higher value for LLC (or lower on some motherboards where the vdroop settings are opposite for some reason) this has the effect of minimising undershoot.
CEP - current excursion protection is a feature that minimises overshoot on some boards.

im a believer in utilising board features in the bios...so, the ultimate way to find out is by tweaking your settings to see the result.
PS if you learn more please share i'd also like to know more about it.

Hi, thank you for your response and the info.

I have watched buildzoid's videos, I just think a lot of it goes over my head (even when I watch the whole rambling episode.)

I just don't think I got what the differences between AC/DC LL and LLC values actual was.

I presumed if you set LLC level 6 from level 5 (for example) that lowers both values. But that's not really undervolting I don't think. So, they must be different things. But I have seen BZ check HWinfo when we made AC/DC LL changes. Just really confused on that I suppose!

I also tinker with the settings in the bios, even though it can be a bit daunting.

My recent issue was clocks dropping in games. I tried disabling CEP and initially presumed it was a loadline issue (after watching BZ.)

It turned out to be that the power settings (even though they never reached maximum in hwinfo) was pre-emptively clipping the clock speed.

I am now using the "extreme" power setting for my 14900KS (320W, 400a) and experimenting with undervolting the old fashioned way by offsetting the core voltage.

Currently at -0.075v offset and testing for stability. I had a previous 14900K and that wouldn't undervolt at all, not even 0.010v.

All good fun anyway!