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1.18v vcore 3770k 4.4ghz? - Page 3

post #21 of 31
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1.25 4.4

MY chip is not golden, it`s wood
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post #22 of 31
Quote:
Originally Posted by Syzygy1290 View Post

I have the p8z77-v

 

Oh, then I recommend the Medium LLC setting.

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post #23 of 31
Thread Starter 
I might. Once I get a stable voltage with no LLC, I'm going to see how much it changes. I'm a little worried about it due to this article...

http://www.masterslair.com/vdroop-and-load-line-calibration-is-vdroop-really-bad
post #24 of 31
Quote:
Originally Posted by Syzygy1290 View Post

I might. Once I get a stable voltage with no LLC, I'm going to see how much it changes. I'm a little worried about it due to this article...

http://www.masterslair.com/vdroop-and-load-line-calibration-is-vdroop-really-bad

 

I don't know when this was written, but he stole all of this content from a very old article on AnandTech's website that no longer applies to today's quality-made motherboards (such as yours). Everything has come a very long way since then.

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post #25 of 31
Thread Starter 
True that...almost 5 years for the Anand article. Can you explain to me the difference then? I currently understand LLC like this:

It stops vDroop and on new boards can be activated at different levels. The result is that the cpu reaches a higher voltage under load which is good for stability. It has two side effects. One is that voltage spikes will rise above your set voltage (simply because this is what Vdroop prevents). This isn't so bad as long as you realize that they would not go above what your voltage had been set to had you not gone with LLC. The second is that the faster voltage regulation and higher volts put out cause more strain on the power delivery components creating more heat. The nice thing about it is that you can run your cpu idle voltage lower because it won't fall as low under load.

So the question is whether the you want lower idle voltages or if the extra load on the power supplying components is worse (higher temp). If you are at load quit often like me (BOINC) then probably it is not worth it. If you're not then it probably is good although then you might want to consider using offset voltage instead of manual settings.

Feel free to correct me...this is only from some online reading over the last few days.

Some questions I still have are..
how is it that a really high LLC can cause you to increase your voltage above your set point? If I am right (which might not be the case biggrin.gif), then cancelling out vDroop should only at most bring you up to your set voltage at load (no vdroop), but I have had a higher load voltage than set voltage with high enough vDroop.

Can LLC cause a voltage spike beyond what would have been set without it?
post #26 of 31
Yes Medium on the P8z77-V works great!
It is what I use smile.gif

LLC in basic terms pushes volts through the chipset. The amount of voltage depends on the LLC setting. So instead of the CPU calling x.x volts from having no extra voltage already in the circuit with LLC the CPU already has x.x volts to work with.
Extreme LLC will push more volts than is necessary through the chipset, thus the CPU will call for less voltage. In reality though it is still using a higher voltage because of LLC already providing voltage.

Really high amounts of LLC is considered bad for long term use because unlike the CPU it does not scale down. With LLC that voltage is constant through the chipset.
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post #27 of 31

The spike that they are referring to is only detectable with special sensing equipment. Software will never show it (maybe with "tomorrow's" technology, but not with "today's"). What you're describing is what is called vRise where vDroop is practically reversed and the voltage rises under full load instead of droops. This isn't the spike that is being talked about. The spike used to occur in that nanosecond when the load on the CPU changed. So, a spike was able to happen many, many, many times in just a split second. With today's quality-made motherboards, this is no longer a concern because they solved the problem (well, I haven't seen any talk about it on OCN for the past 4 years).

 

So, I'm absolutely certain that it's no longer a concern. I think the only concern now is hotter Voltage Regulator Modules from using the highest LLC setting (or sometimes just getting too close to the highest setting). I've seen a couple of people here on OCN say that a hotter VRM can reduce stability.

 

I guess in other words, I feel it's not worth worrying about if you know that your VRM's temps are ok. It's not that a hotter VRM will result in spikes, but it's kind of like a hot CPU: it can reduce stability.

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post #28 of 31
Thread Starter 
So it sounds like, I am essentially understanding correctly. The only real advantage of LLC is that it lowers your idle voltage, but at the cost of increasing VRM temps by a couple degrees. I never was really worried about voltage spikes as I didn't think these would be any greater than the voltage that you would have to set without LLC (assuming that a short voltage spike is less damaging than a more constant voltage).

I'm doing a creating some optimized manual overclock profiles at the moment to see if I can see any temp difference (my guess is not until a high or very high LLC).

Sorry to keep changing the subject but...What about on a setpoint OC? What effect does LLC have on that?

Thanks for the comments so far...you guys are awesome.
post #29 of 31
Quote:
Originally Posted by Syzygy1290 View Post

So it sounds like, I am essentially understanding correctly. The only real advantage of LLC is that it lowers your idle voltage, but at the cost of increasing VRM temps by a couple degrees. I never was really worried about voltage spikes as I didn't think these would be any greater than the voltage that you would have to set without LLC (assuming that a short voltage spike is less damaging than a more constant voltage).

I'm doing a creating some optimized manual overclock profiles at the moment to see if I can see any temp difference (my guess is not until a high or very high LLC).

Sorry to keep changing the subject but...What about on a setpoint OC? What effect does LLC have on that?

Thanks for the comments so far...you guys are awesome.

I don't believe that is correct.
LLC reduces the range of the CPU voltage, Vdroop. The effect it has on idle voltages is negligible unless you only use your system at idle state.
What it does is make it easier to find the true voltage the CPU is in fact stable at. So if you set the CPU voltage in BIOS at 1.2 and your board has a Vdroop of 0.2.
The CPU will read as 1.0 at load because of the drop in voltage. If the CPU required 1.2v to be stable you would need to bump the BIOS voltage up to 1.4v.
Adding LLC to push that extra 0.2v will let you set voltage in BIOS at 1.2 and read at load at 1.2.
--very basic idea of this--
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post #30 of 31
You guys think I should lower my LLC? Mine is set on Ultra High as per the guide here. Mobo is Asus P8Z77-I Deluxe. Offset mode -0.03. Vcore on CPU-Z is 1.144 @ 4.4Ghz when stressing with prime95.
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