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post #19911 of 22487
Quote:
Originally Posted by deegzor View Post

Just enabled c7 state and temps wen't on idle to ~23C and power consumption dropped to 5-10w. I guess this is enough for me since core speed doesn't hurt cpu.

Hmm, i was monitoring my core frequency on hwinfo and found out that my max clock jumped to 4.8ghz and bus speed to 102.4mghz.. Tried to take C-states off again but it still happens after pc is idling few minutes. Also checked with hwmonitor (i know it's bad) and it showed max core clock 4773mhz. Is my overclock suddenly unstable or what could cause this?

P.s No crash, no bsod, everything seems to work fine rolleyes.gif
post #19912 of 22487
If it doesn't crash it's stable.

Hwinfo and other programs get the clock by multiplying bclk with multiplier. So when the bclk goes to 102 then you get another 100 mhz.

It's a fairly common thing. Most people just change the setting in hwinfo so that bclk is only read on startup. Then you just ignore it.
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post #19913 of 22487
Quote:
Originally Posted by jdorje View Post

Enable all cstates. Adaptive voltage does not do anything if cstates are working.

Yes it does. C-states will only lower voltage when the core is idle. When cores are active, the voltage will be varied with the load (frequency) while the core is active.
post #19914 of 22487
Quote:
Originally Posted by deegzor View Post

if i remember correctly, no stress testing with synthetics after this? x264 v2 few loops should be enough?

A few successful loops is not much of an indication of stability. You should run other stress tests as well and for some time if you want stability.
post #19915 of 22487
How would you go about proving that? I never see full voltage when the cpu isn't under load and at full clock. Therefore I'm pretty positive you are wrong.
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post #19916 of 22487
Quote:
Originally Posted by jdorje View Post

How would you go about proving that? I never see full voltage when the cpu isn't under load and at full clock. Therefore I'm pretty positive you are wrong.

With fixed voltage, you never see full voltage on a core when you have the C-states enabled because the core is idle (that is what C states are, except for running C0 state) and the voltage is lowered or removed in the idle C-state. Adaptive voltage applies to the running, C0 state, and if you have adaptive or offset voltage enabled, when the core is running, the voltage is adjusted according to load. If you do not have adaptive or offset voltage enabled (fixed voltage), then the voltage is always at the fixed voltage you set when the core is in running.

or in other words, with a fixed voltage, when you see a lower voltage on a core, it is because it is in an idle state. Cores executing code will be at the full voltage.

I am not wrong, that is the way it works. Read about it in the 4th generation data sheet volume 1 if you want to understand how it works.

EDIT:
BTW the various lower voltage/frequency states cores can take when running (sub-states of C0) are called the P-states and are disabled/enabled thorough enabling/disabling EIST and not running in fixed voltage/manual/override mode,.



.
Edited by GeneO - 3/1/16 at 9:41pm
post #19917 of 22487
You know, the manual/override voltage behavior is what I see on my Asus boards. I wonder if manual is even in the Intel vocabulary and it is not some motherboard manufacturer dependent implementation. I think I recollect some motherboards don't seem to lower voltage even with c-states enabled when in manual mode. So maybe we are both right. LOL.

The way to tell what is happening is to look at the VID (not core voltage) in HWIFO64 when idle. If the VID hasn't dropped but the core voltage has, then the voltage drops you see are from the cores idling.

.
Edited by GeneO - 3/1/16 at 10:20pm
post #19918 of 22487
Yes, I never see full voltage unless the CPU is under full load. I fail to see how this is different from adaptive voltage though. If the chip is at partial load, say 1400 or 2300 or 2900 mhz, the voltage will be something like 0.7V.

Again, how would you prove that adaptive is doing anything at all? If the chip is at full clock then you have the maximum voltage which is the same either way. If it's not then cstates causes you to have much reduced voltage. How would you demonstrate there was some state in between where adaptive did anything?
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post #19919 of 22487
On my GENE VII, if I set manual voltage and and enable EIST, C1 and C3, I only see two different voltages. When cores idle it's 0,724V and when they're under any load it's at whatever was set, say 1,296V. VID doesn't change, however. There's also "fully manual mode", which disables EIST and C-states and applies constant voltage. When I use adaptive mode there are more "steps". 0,724V @800Mhz, 1.020V @ 4Ghz, 1.296V @ 4.7Ghz, 1.344V @ 4.7Ghz... and probably a few in between. VID changes along with Vcore.
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post #19920 of 22487
Quote:
Originally Posted by GeneO View Post

You know, the manual/override voltage behavior is what I see on my Asus boards. I wonder if manual is even in the Intel vocabulary and it is not some motherboard manufacturer dependent implementation. I think I recollect some motherboards don't seem to lower voltage even with c-states enabled when in manual mode. So maybe we are both right. LOL.

The way to tell what is happening is to look at the VID (not core voltage) in HWIFO64 when idle. If the VID hasn't dropped but the core voltage has, then the voltage drops you see are from the cores idling.

.

That is correct, my GB mobo keeps all voltages maxed if have the vcore to a specific number. It was pegged even when the core down-clocked to 800MHz. Adaptive only kicked in when I set the vcore back to "normal" and use your offset to compensate. So, I think you are both right depending on MFG.
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