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Discussion Starter #1
trying to optimize my 3.8ghz 24/7 oc, vcore is set @ 1.44375v in bios

however, after ~8 hours of prime95, which passed fine, i noticed in HWmonitor that my vcore fluctuated from 1.33v to 1.54v

is this normal? does this mean when i set my vcore to 1.53v in bios for 4ghz, it'll actually reach 1.6v+ at times? is this dangerous?
 

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I can see going up and down half a volt or so here or there but if its jumping for example, from 1.4V to 1.5V, then back down to 1.3V and so on and so forth, might want to look into that.

If you have a high overclock you're already on the trip wire or close to it, my Phenom II starts to get hot over 1.5V REAL quick, and enough spikes to 1.6V could damage my chip and/or mobo.

A large enough spike in the volts, even if its just for a moment, can do serial damage in a hurry.
How stable is it when you aren't doing any activity?
 

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Discussion Starter #3
during idle/using firefox, it sits around 1.41v usually, it'll jump down to 1.39v or up to 1.44v sometimes but for the most part, it hovers around 1.41-1.42v which seems normal to me

it's just when i run stability tests, i see it jumping at least .1v over what i set in bios

does that i mean i shouldnt be running 4ghz @ 1.53v anymore? because it'll likely jump to ~1.63v and might be damaging? i never really paid attention to the min/max vcore when running @ 4ghz, it did pass OCCT w/ no errors, but now i'm afraid to go back and try
 

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Discussion Starter #5
LLC is on Auto ( will setting this to a certain % help? )

voltage in bios is set to 1.44375v or something like that, 1.44xxxx
 

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LLC will to some extent either stabilize or add a small amount (around .05v if I remember correctly) under load. LLC helps vdroop on some boards this way. Leaving it set to 'Auto' may not be suitable for your overclock.

I think some people use the lower percentage to get it working they way it's meant to be, but don't quote me on that. I'd say read up on some of the threads or search for 'AMD LLC' here on the forum to find your answer.
 

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I have the same motherboard and it took me days to figure out what my best settings would be to turn off the voltage fluctuation. I set LLC to 38.7% and CPU VDDA to 2.6 and now my cpu fluctuations are between +/-.01 or .02.

Play around with it and see what settings work for you.
 

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Discussion Starter #8
thanks, i appreciate the help

will try that and report back
 

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Quote:

Originally Posted by koven View Post
thanks, i appreciate the help

will try that and report back
Hopefully those settings will work for you, it works for me but it might not work for you. It took me awhile to find the best settings for my system. Just fiddle around with LLC until you find your best option.
 

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What the heck is LLC and where is it in the bios? i only have mine at 3.8 and its kinda stable ide like to be able to get it stable for playing crysis I dont know how suitable the AOD stability test is and i did not use AOD i used the Bios for the OC i havent been doing this too long though
 

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Your board may not have an LLC option. Some don't. Mine doesn't sadly.

You need to run Prime95 on Small FFT and Blend for about 6 hours each which will stress everything to be stable.
 

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Discussion Starter #12
p95 running now w/ LLC @ 38% and CPUVDDA 2.6, will report back in a few hours w/ vcore #'s

hope it doesn't jump over 1.5v this time!
 

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Quote:

Originally Posted by koven View Post
p95 running now w/ LLC @ 38% and CPUVDDA 2.6, will report back in a few hours w/ vcore #'s

hope it doesn't jump over 1.5v this time!
the higher you set the llc % the lower it stays below what you set it. I havemine at 16% i beleive.

Sorry for the typos im on my phone
 

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Discussion Starter #14
well, 38% and 2.6 cpuvdda didnt seem to work, still jumped to 1.52v... will try 16%
 

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Quote:

Originally Posted by koven View Post
well, 38% and 2.6 cpuvdda didnt seem to work, still jumped to 1.52v... will try 16%
Just fiddle until you find your best setting. I know 19% works best for dual cores. You will find your settings and once you find it you well be able even lower your vcore and still remain stable. Me at 3.5 I am stable at 1.33vcore.
 

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i lied it crashed during crysis but also my ac went out while i was sleeping so its not as cold in my room anymore either
 

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Discussion Starter #18
ok.. i've tried a bunch of LLC settings from 0% to 19% to 35% but my vcore still fluctuates at least .1v

i.e. i set it to 1.43v in bios and after 8 hours of prime, my vcore ranged from 1.32v to 1.54v

any other ideas..?
 

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lolz thanks for this thread. Mine also fluctuates however, instead of having a 1.4 to 1.39 vcore after increasing it really high I logged into windows @ 1.504, it does go down a bit, but woot woot thanks. I kept saying my heat was way too high for the amount of vcore the cpu was getting! Derp derp!

Now I need to turn of over/under voltage which should stop the fluctuations, thanks guys!

(Load Line Calibration on my board)
 

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I find it strange that the voltage fluctuates that much. 0.01-0.035v ok, but 0.1 and over NO. Could it be your psu? Have U tested with LLC off?
 
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