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post #11 of 22
Ok to clear this up, i forget myself since i havent done it for a while!

So the DVID works like this:

Multiplier defines the VID, the +/-0.005v offset will determine the VID as close as possible to 0.00v offset.
However using Auto Vcore offset causes the Motherboard Manufacturer to advise the Vcore. That is why 0.005v offset fails to boot, and Auto is 1.5v.

x45 Multi
DVID + 0.005v Offset = CPUz VCore - 0.005v = 1.30v (May fail to boot)
Auto: Motherboard lookup table -> Select recommended VCore based on selected Multi = 1.50v (Over volted as expected)
DVID + 0.05v Offset = 1.35v ->Stable

So you are safe to increase the offset till it boots and go from there. For precaution, i would disable the CStates and EIST till it boots, as you may push unnecessary Vcore if these settings cause the CPU to fail to boot into Windows.

The only real way to be safe is start at stock multiplier and 1 multipler higher, test with Auto and 0.005v Offset, you should confirm my theory then.
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post #12 of 22
.[/quote]
Quote:
Originally Posted by wampastompa View Post

Good info, I'm finding out that a small positive offset is exactly what I needed.

I guess to put it concisely, I was confused because of a couple of things:

- The offset I'm ending up with is nowhere near what I expected from reading guides and approaching it logically (I guess because of LLC)

- I assumed that the auto setting would be equivalent to zero offset because it is positioned between -0.05 and +0.05. It isn't.


I agree that your chip isn't great, but I don't think mine is either and I think you could do a lot better. The voltage you're using is pretty low, Ivy Bridge can go much higher than 1.2V. Are your temps too high? If not, keep going. I've done a lot of reading too and I know that it's perfectly safe to get your temps up in the 90s while stress testing. Max is 105, and you will never hit your stress test temps in normal use. I'm at 4.5 GHz and 1.3V right now, and my temps never get higher than about 75-80. Once I get a better handle of working with offset, I plan to keep pushing it.

Like you said, I can get 4.2 GHz on auto with no issues and very reasonable temps. I've seen the success others have with the 3570 and I don't think my chip is that great either.

Temps are another thing people disagree on:) I wanted to keep under 80 just 'because'. I tested and ran at 4.3 ghz for a while my chip needs 1.29 V around to be stable there. So i guessed from that jump 4.2 ghz is where the hill starts to get steeper as it were and I became uncomfortable with my temperatures at that voltage with my cooler when summer started to kick in last year (Such as summer is in 'sunny' England).

I guess I could push it with a better cooler but I decided that an extra .1 or 2 wouldnt make as much difference as putting the money towards a 780 biggrin.gif.

"Multiplier defines the VID, the +/-0.005v offset will determine the VID as close as possible to 0.00v offset.
However using Auto Vcore offset causes the Motherboard Manufacturer to advise the Vcore. That is why 0.005v offset fails to boot, and Auto is 1.5v."

Interesting, I have notes here that when I was testing I set the multiplier to 3.8 just to test on auto and I pulled 1.3 vcore under a normal load. Perhaps the mobo manufacturers differ? I've only used Asus. Also according to my old notes I actually pulled 1.55(!) Vcore at 4.5 ghz on auto I remember I thought I had screwed my chip couldnt shutdown fast enough after I opened CPUz bigeyedsmiley.pngsmile.gif
post #13 of 22
Yes each manufacturer tunes the Auto Vcore to their sample of CPUs and how they overclocked.
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post #14 of 22
After going round in circles with an overclock on a different platform, what I learned is that, a good overclocking procedure must start with an exploration of how to take the reigns of the voltage control on the motherboard in question first. Trying to solve the voltage problem at an overclocked setting is counterproductive and will usually lead to a lot of BIOS resets recoveries, etc. Learning all the nuances of how each setting effects the starting VID, and effective voltages under a load, and taking the time to find a stable under-volted setting at a given "lowish" clock speed, offers enormous insight into what sort of voltage will be required to achieve a particular overclock, and how to achieve it via offets/LLC etc. Once I finally ironed out all the variables and how/when they come into play, I was able to boot at 5ghz because I knew how to get the actual voltage required to the chip without going way over or under. (not enough cooling to use this permanently but it was a good confirmation of a working procedure).
     
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post #15 of 22
Thread Starter 
Quote:
Originally Posted by jasjeet View Post

Ok to clear this up, i forget myself since i havent done it for a while!

So the DVID works like this:

Multiplier defines the VID, the +/-0.005v offset will determine the VID as close as possible to 0.00v offset.
However using Auto Vcore offset causes the Motherboard Manufacturer to advise the Vcore. That is why 0.005v offset fails to boot, and Auto is 1.5v.

x45 Multi
DVID + 0.005v Offset = CPUz VCore - 0.005v = 1.30v (May fail to boot)
Auto: Motherboard lookup table -> Select recommended VCore based on selected Multi = 1.50v (Over volted as expected)
DVID + 0.05v Offset = 1.35v ->Stable

So you are safe to increase the offset till it boots and go from there. For precaution, i would disable the CStates and EIST till it boots, as you may push unnecessary Vcore if these settings cause the CPU to fail to boot into Windows.

The only real way to be safe is start at stock multiplier and 1 multipler higher, test with Auto and 0.005v Offset, you should confirm my theory then.

Thanks, this is the sort of explanation I wanted. I figured out how to get the voltage I needed, I just wanted to understand better what was going on. I still have a lot to learn about LLC, though.

I have it set up exactly how I wanted now, and it's stable. I did disable C3/C6, although most of the time I was working with EIST enabled. Should I keep C3/C6 disabled permanently?
post #16 of 22
Thread Starter 
Quote:
Originally Posted by Slink3Slyde View Post

Temps are another thing people disagree on:) I wanted to keep under 80 just 'because'. I tested and ran at 4.3 ghz for a while my chip needs 1.29 V around to be stable there. So i guessed from that jump 4.2 ghz is where the hill starts to get steeper as it were and I became uncomfortable with my temperatures at that voltage with my cooler when summer started to kick in last year (Such as summer is in 'sunny' England).

I guess I could push it with a better cooler but I decided that an extra .1 or 2 wouldnt make as much difference as putting the money towards a 780 biggrin.gif.

"Multiplier defines the VID, the +/-0.005v offset will determine the VID as close as possible to 0.00v offset.
However using Auto Vcore offset causes the Motherboard Manufacturer to advise the Vcore. That is why 0.005v offset fails to boot, and Auto is 1.5v."

Interesting, I have notes here that when I was testing I set the multiplier to 3.8 just to test on auto and I pulled 1.3 vcore under a normal load. Perhaps the mobo manufacturers differ? I've only used Asus. Also according to my old notes I actually pulled 1.55(!) Vcore at 4.5 ghz on auto I remember I thought I had screwed my chip couldnt shutdown fast enough after I opened CPUz bigeyedsmiley.pngsmile.gif

Your auto voltage experiences are the same as mine, though I do have an Asus board. As far as temps go, seasons are definitely something to consider. I saved a lesser OC profile with the expectation that I would need it for the summer, but then I remembered that I have an air conditioner. thumb.gif
post #17 of 22
Thread Starter 
Boy that ".[/quote]" in your post really screwed me up
post #18 of 22
Quote:
Originally Posted by wampastompa View Post

Boy that /quote in your post really screwed me up

Ha, excuse my forum noobiness biggrin.gif. Just for your info I have all the C states and Speedstep enabled, and have experienced no problems in a year. I did disable them initially when I was testing and re-enabled them once I was totally stable without, keeping things systematic.

I think they may cause instability if you're unlucky these days but its more of a relic from the past people got into the habit of disabling them permanently on older chipsets and CPU's. At least I read that somewhere when I was doing my O/c, some people will probably disagree and I have no real argument against it other then they didn't affect mine smile.gif.
post #19 of 22
Quote:
Originally Posted by wampastompa View Post

Good info, I'm finding out that a small positive offset is exactly what I needed.

I guess to put it concisely, I was confused because of a couple of things:

- The offset I'm ending up with is nowhere near what I expected from reading guides and approaching it logically (I guess because of LLC)

- I assumed that the auto setting would be equivalent to zero offset because it is positioned between -0.05 and +0.05. It isn't.


I agree that your chip isn't great, but I don't think mine is either and I think you could do a lot better. The voltage you're using is pretty low, Ivy Bridge can go much higher than 1.2V. Are your temps too high? If not, keep going. I've done a lot of reading too and I know that it's perfectly safe to get your temps up in the 90s while stress testing. Max is 105, and you will never hit your stress test temps in normal use. I'm at 4.5 GHz and 1.3V right now, and my temps never get higher than about 75-80. Once I get a better handle of working with offset, I plan to keep pushing it.

Like you said, I can get 4.2 GHz on auto with no issues and very reasonable temps. I've seen the success others have with the 3570 and I don't think my chip is that great either.

I'm quite curious, just how high an overclock can you achieve with that chip.. 4.7Ghz maybe? I wouldn't advocate for any vcore higher than 1.43v and 85°C average (may very very briefly spike to 88°C max post-flame-small.gifpost-flame-small.gifpost-flame-small.gif)
I would really like to know...
post #20 of 22
Quote:
Originally Posted by TLM-610 View Post

I'm quite curious, just how high an overclock can you achieve with that chip.. 4.7Ghz maybe? I wouldn't advocate for any vcore higher than 1.43v and 85°C average (may very very briefly spike to 88°C max post-flame-small.gifpost-flame-small.gifpost-flame-small.gif)
I would really like to know...

I don't think you want to try 1.43 Volts on a Hyper Evo 212 devil.gif

EDIT: I was looking for more fire/burning related smilies tongue.gif
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