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2500K multiplier question. - Page 2

post #11 of 18
Thread Starter 
Quote:
Originally Posted by techheadtrevor View Post
Your problem sounds very much like throttling. I read the techy spec sheet on the sandy bridge processors and the chips are designed to systematically lower the multiplier one notch at a time if there is a major problem with the chip, at a certain speed and temperature, until the problem goes away.

It doesn't seem your temps are that high... they seem to be normal... but having your chip downclock 4-5 seconds after you stess it seems to me to mean that the chip is getting information from somewhere that it is in trouble(most likely temperature wise) and so tries to save itselfe. This may be because the sensors are good(and the chip really is in trouble) or bad(the sensors are bad or sensor feed is bad).
If this is the problem you might need to RMA your board, but I'm not sure about other fixes or ways to test this.
When i use automatic overclock feature in my BIOS i can boot at 4.8ghz but the voltage and temp are way to high for me.. (1.51v and 55C at idle...).

When the vcore is set to auto, it resolve the problem but it put my voltage too high for my comfort... like 1.4 for 4.4ghz...

My board seems to dislike fixed voltage..
    
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post #12 of 18
yes..that is always the question with Sandy Bridge overclocking isn't it?

Actually it's the only question Mom needs to know about overclocking her Sandy Bridge. Just slide the multiplier bar back, reboot and calll her good.
post #13 of 18
its already discussed monsieur

raise short and long power duration limits

up to 180/150 in your case.

http://s52.radikal.ru/i136/1101/10/5a39dae9465f.jpg

bon chance
post #14 of 18
Thread Starter 
Quote:
Originally Posted by clock12 View Post
its already discussed monsieur

raise short and long power duration limits

up to 180/150 in your case.

http://s52.radikal.ru/i136/1101/10/5a39dae9465f.jpg

bon chance
Wow +1 Rep. thank for the info! It resolve the problem!

I make a little research on google and i have difficulties to find info about these short and long power duration limits.. Can someone give me a link or a chart that explain wich settings are the best ? Like 250/200 for a multiplier of 50...

Thanks!
Edited by exale - 1/30/11 at 11:53am
    
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post #15 of 18
you won`t need a link,youre on the right track

it`s all a question of your cooling and how much v core you dare to apply.

so for a 50 multi you may start ~1,45 v core,also usefull can be to tweak the cpu pll voltage too.

hopefully your bios has already the pll override,which should be of course enabled.
post #16 of 18
Thread Starter 
Ok but what is the highest short and long power duration limit i can go with my system ?

With my coolermaster V8, i have 72 Celsius under load at 4.8GHZ with 1.47vcore and 200/200 at power duration limits... Is it dangerous to burn my chip ?

For 24/7 use im more comforatable with my current setting... 4.5GHZ @ 1.30vcore with 180/150 for the power duration limits. I get 35C normal and 60C max under load.
Edited by exale - 1/30/11 at 12:54pm
    
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post #17 of 18
good question-nobody knows right now-no long time experience.

i`ve run some extreme test 2 days ago-v core load 1,64 volt-chip is still living-no degrade so far

http://i005.radikal.ru/1101/65/c3ab0080a52d.jpg

so i dare to say :v core in bios max 1,48 at load line calibration 1
under load -prime- you should have max 1,52 v.

how much your cpu need for 5...

well thats your run.
post #18 of 18
..but in order to give you a rough idea about voltages

these are my settings for 5 ghz-its the asrock extreme 6

note,i`ve used a really bad 2600k,so probably no need to push v core to this level.





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