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post #3191 of 5494
Why doesn't it change then? The clocks drop but voltage stays fixed.
post #3192 of 5494
Quote:
Originally Posted by Martin778 View Post

Why doesn't it change then? The clocks drop but voltage stays fixed.

Hi Martin. Thanks for sharing your experiences.

Could you please post a cinebench r15 at max overclock???

wink.gif
post #3193 of 5494
Quote:
Originally Posted by aerotracks View Post

Feels like I've already answered your question, but I'll try again tongue.gif - Your voltage mode has nothing to do with reduced idle voltage. This is because the C-States are responsible for dropping VCore in idle.

As long as C-States are active, Idle voltage in Override is almost zero just as much as Adaptive voltage is almost zero.

It's been this way since the very first gen of (F)IVR chips in 2013.


This interests me as well. So you are saying, if i keep the C-states on, and set the vcore to fixed, the voltage will drop alongside clock speed, when core is idle? What the fixed means then? Its like fixed only under load or something? If already fixed "adapts" to load, what is the point of adaptive?

EDIT: Why does the CPU-Z report fixed vcore value, even at idle, if as you say, that value drops due to C-states?
Edited by Timmaigh! - 9/19/17 at 3:54am
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post #3194 of 5494
C-State only drop CPU frequency on idle, and not the core voltage.
CPU core voltage will drop on idle only when adaptive voltage was chosen in the BIOS
post #3195 of 5494
Quote:
Originally Posted by Martin778 View Post

As I said, 7920X and up are ALL big HCC die. Same size, different core count.

So the 7920X is basically a 7980XE with 6 cores + cache disabled?
post #3196 of 5494
Quote:
Originally Posted by Timmaigh! View Post

This interests me as well. So you are saying, if i keep the C-states on, and set the vcore to fixed, the voltage will drop alongside clock speed, when core is idle? What the fixed means then? Its like fixed only under load or something? If already fixed "adapts" to load, what is the point of adaptive?

EDIT: Why does the CPU-Z report fixed vcore value, even at idle, if as you say, that value drops due to C-states?

Quote:
Originally Posted by ELIAS-EH View Post

C-State only drop CPU frequency on idle, and not the core voltage.
CPU core voltage will drop on idle only when adaptive voltage was chosen in the BIOS

guys - c-states operate on individual cores, cpuZ reports the manual override vcore to any core.. and unless you do a complete suspend to ram (s-state) you have wake cores. those cores that are parked or in low power state receive near zero volts.
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post #3197 of 5494
Quote:
Originally Posted by Betroz View Post

So the 7920X is basically a 7980XE with 6 cores + cache disabled?

Yes.

Quote:
Originally Posted by Jpmboy View Post


guys - c-states operate on individual cores, cpuZ reports the manual override vcore to any core.. and unless you do a complete suspend to ram (s-state) you have wake cores. those cores that are parked or in low power state receive near zero volts.

Thanks!thumb.gif
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post #3198 of 5494
Passed one hour at 4800 1.230V Realbench 2.4x.

Testing 4700 at 1.180-1.184V now. (1.160V in bios).

This is with lowered cache which seems to help alot, maybe my chip is finally "broken" in. Manual voltage and -2/-4 AVX offset.

Seems like a decent 7800X.
Edited by GreedyMuffin - 9/19/17 at 6:50am
post #3199 of 5494
I am stable at round 4600 @ 1.21V but it's hard to call it stable as the temps are very high.

What cache voltage/frequency do you use?

My best Cinebench R15 run so far is 3114:
https://i.imgur.com/9wAbnGJ.png
Edited by Martin778 - 9/19/17 at 8:38am
post #3200 of 5494
Any info if the toothpaste quality on the 7920x and above is better or same as the one used on 7900x and lower? 🤔
Thanks
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