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Llc?

post #1 of 7
Thread Starter 
So here is my question, i have overcloked my i7-2600k to 4,5Ghz and is stable (almost 2 days in a row without BSOD or freezes running Prime95 + Starcraft 2 + Dragon Age 2 - VS 2010 - Dev tools etc etc etc, so far so good ) and somebody told me from another post about adjusting my LLC so i could drop a few centigrades (right now my idle temp is 39c~ and at full load 68c~)

So, how does the vcore Load Line Calibration works? right now i have it at AUTO which is the default on the MOBO.

Anyone? Thanks in advance!
    
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post #2 of 7
Disable LLC, a higher Idle coltage is nothing to worry about, nor are high idle temps. LLC can cause more issues especially if the idle voltage drops below the stable voltage at which you find whilst stress testing.

Only run LLC if your idle voltage matches your load voltage. If your Bios offers Enabled, Disabled and Auto, leave it on Disabled. If it gives you more options then test to see if you can get Vcore at load and idle the same, if not use Disabled.

Youll BSOD at low or idle loads if the idle voltage falls below the voltage your stress test passed.
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post #3 of 7
I need to correct what jasjeet said, just a little bit, and expand on it, since you don't NEED idle and load vcores to match. That is just what people consider "ideal."

LLC is perfectly fine to use, as long as your idle voltage either matches, or is higher than your load voltage. As long as this is the case, you should not have any issues whatsoever. A small amount of LLC can significantly reduce the voltage you need to set in the BIOS, and for a 24/7 setting, where you are idle at higher manual voltages, this can help preserve the CPU a little bit.

When you start to get issues, is when the idle vcore is LOWER than the load vcore (this is assuming you aren't using offsets and speedstep, of course). A tiny vrise (about 0.01v) isn't harmful, but when you have something like a 0.05v difference between idle and load, something that uses 1 thread, which can put one CPU at load while not loading the others, can be enough to cause a crash, if the full load vcore is fully stable, but the idle and light load vcore is below this limit. And if you raise the BIOS vcore to make the idle vcore at the stable limit, your LOAD vcore is going to be much higher than it should be, which is neither healthy, nor necessary, and completely defeats the purpose of having vrise. It's far, far safer for the idle vcore to be 0.05v above the stable limit of load vcore, than it is for the load vcore to be 0.05v above the needed stable limit, since then you're putting too much voltage into the CPU.

Vrise (higher load vcore than idle, by any more than 0.02v) is only useful for benchers, since they don't care about idle volts, since they won't be idle for long, and they won't have to use higher idle volts to compensate for droop.
Edited by Falkentyne - 4/18/11 at 4:08pm
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post #4 of 7
Thread Starter 
ok so yes, my idle vcore is higher that the load vcore:

- idle: 1.272 (some times it gets to 1.264)
- load: 1.264 (some times it gets to 1.256)

And right now my vcore is set to 1.26 on the BIOS. And the LLC is ENABLED AUTO as default on the BIOS.
That means, im ok with the AUTO LLC on my BIOS and i can keep using it that way for the time being right?

But, there is a difference of 0.008~ between my idle and load vcores.. not sure if thats ok following what you just said.
    
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post #5 of 7
Thread Starter 
Look at my AUTO conf:


Uploaded with ImageShack.us

I also noticed that my BIOS said something like this on the LLC:

0%
25% (Suitable for 3.8-4.0)
50% (Suitable for 4.1-4.5)
75% (Suitable for 4.6-4.8)
100% (4.9 and above)

Or something like that... so right now is at AUTO as i already said.
    
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post #6 of 7
Yes your setting is good, i didnt know your Mobo had that advanced LLC settings at Auto, usually Auto = 100%.
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post #7 of 7
About those percents:
The amount of vdroop you get is based on the vcore...the higher the vcore, the more droop you will get.
With a certain amount of LLC, the lower your vcore, the less amount of droop you will have, since--obviously, the voltage is less. Sort of makes sense, right? 1.1v with a 0.1v droop is a FAR bigger percentage than 1.5v with a 0.1v droop.

So, the higher your vcore with a certain amount of LLC, the more vdroop you will have, so you can increase the amount of LLC by a little bit.
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