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Did we ever come a conclusion on safe SB voltages? - Page 3

post #21 of 93
Quote:
Originally Posted by bce22 View Post
Two Cables,

Well if i knew how awesome your answer would be I would have asked ages ago. Thanks for the great post.

Sorry to semi-hijack the post.

Personally i think i will try to up my voltage to hit the 5ghz e-peen barrier using offset. Physcologically i feel better knowing the voltage will throttle down at idle.
hehe it's all good. I was using a Manual voltage myself at first until a couple of people from the P8P67/P8Z68 thread came into my thread and were like "hey why are you still using a Manual voltage? Don't you know about using an Offset?" lol That was a good week or two after I upgraded too.

So I was lucky. If it weren't for them, then it would have taken way longer for me to figure it out. I mean I used to have an E8400, so I loved seeing my voltage and clocks maxed out 24/7. However, it was then explained to me that it might be better for these 32nm transistors if I allow all of the power-saving features to do their thing.

In the end, I learned that if I leave the BCLK at 100.0 MHz, then I can indeed take full advantage of these power-saving options without worrying about it in the same way I used to worry about it back in the days when I didn't have an unlocked multiplier. So that was music to my ears because for the first time ever, I could have my CPU heavily overclocked and still watch those power-saving features work their magic.
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post #22 of 93
Thread Starter 
Quote:
Originally Posted by bce22 View Post
Two Cables,

Well if i knew how awesome your answer would be I would have asked ages ago. Thanks for the great post.

Sorry OP for semi-hijacking your thread.

Personally i think i will try to up my voltage to hit the 5ghz e-peen barrier using offset. Physcologically i feel better knowing the voltage will throttle down at idle.
Don't feel bad. It was actually my next question. My strategy is that, once I find a stable manual voltage, then it would be time for offset. Now I know how to do that.

So, actually, thank you for asking!
post #23 of 93
hehe OCN is too awesome for words.
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post #24 of 93
Thread Starter 
Quote:
Originally Posted by TwoCables View Post
hehe OCN is too awesome for words.
This is when I really wish OCN had "Like" buttons for posts, instead of just Rep.
post #25 of 93
Quote:
Originally Posted by Nick2253 View Post
This is when I really wish OCN had "Like" buttons for posts, instead of just Rep.
Hmm.... that's a great idea!

The new OCN platform is launching very soon (all I can say is that it is absolutely positively being released before 2011 is over), so I wonder if this is something they can add... I will check!
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post #26 of 93
They tried the 'like' button briefly, got too many complaints & nuked it.
    
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post #27 of 93
Quote:
Originally Posted by TwoCables View Post
Oh, I am glad you asked about Offset mode. It's actually fairly easy to figure it out.

My first step is to set Load-Line Calibration to Ultra High for the smallest amount of vDroop possible while also avoiding vRise. This helps for what we will do next.

Look at this part of Real Temp (I recommend Real Temp 3.67):




Click that button if necessary.

If you get a very low number in comparison to mine here, then put some load on the CPU to see what your actual Voltage Identifier really is.

Now find the difference between the VID you get and the core voltage you want to see in CPU-Z while under full load, and then the Offset value you need to use is revealed. So what you do at this point is round up or down a little bit to see which Offset achieves the exact voltage you want (experimentation will be necessary).

For example: my VID flip-flops between 1.3561V and 1.3611V. The core voltage I wanted was a flip-flop between 1.392V and 1.400V. So the difference between these 4 numbers (the two VIDs and the two voltages) is 0.0359/0.0309 and 0.0439/0.0389. My Offset ended up needing to be +0.040V to achieve the voltage I want, but someone else with an identical system may end up needing +0.035V or +0.045V.

So yeah, that's basically it.

If you lower the LLC to High, then the Offset will need to be adjusted a bit to compensate. If the LLC is raised to Extreme, then of course the Offset will need to be adjusted the other way.
I'm starting to be a little skeptical about VID being 'individually programmed'. For the last 4 weeks, I've been running a 2500K @ 4.8, it's load vid is 1.3861. I picked up at 2600K (and a new mobo) today. At 4.8, you'll never guess what load vid is? One handed sitting ovation for the man who guessed 1.3861! Too much of a coincidence in my books...I'd say we talking in this thread don't necessarily understand everything about vid yet.
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post #28 of 93
I can report on my 2 sandy bridges.

2500k: 4.9 Ghz @ 1.47 vcore - air
2600k: 4.8 Ghz @ 1.51 vcore - water

They both fold 24/7 and I've had no problems with either one.
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post #29 of 93
Quote:
Originally Posted by FtW 420 View Post
They tried the 'like' button briefly, got too many complaints & nuked it.
I ruined the heck out of that stupid "Like" button.

Anyway, 4.90GHz, 1.488v checking in. Been running 1.45v+ since I got it in February.
 
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post #30 of 93
there seems to be some confusion here.

-VID does not mean that you can jack it up to 1.52v and overclock to 5ghz and be fine. VID is the maximum voltage that CPU's from the factory can take AT STOCK and be fine.

-1.45v is really okay, even at high overclocks.

-its not the voltage that causes degradation. its the temperatures. if youre worried about degradation, invest in better cooling.

-stability is dependent on temperatures as well.

so, if you dont want electromigration to occur at high freq/voltage, keep your CPU cold.
 
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