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Changing over from Manual to Offset mode.

post #1 of 8
Thread Starter 
Hello everybody. So while I *think* I've got most all of this understood, one major thing has me sorta stuck. Please correct me where I'm wrong.

I'm using an Asus P8Z68/GEN3 and an i5-2500k with 8GB 1333 RAM.

It is my understanding that to find your offset voltage, you run prime and check your VID using CoreTemp under 100% load. I know from using manual mode, that I was able to set a 4.5ghz speed and it was stable for a 12 hour blend at 1.315v. If my VID shows 1.3961, my offset would be 0.0811, right? That seems much too high, and my motherboard only allows an offset of 0.0640. So this is where I'm confused. I have no clue what I should be setting my offset value to be.

I also am reading a ton of conflicting settings concerning c-states, PLL, OC Tuner, Phase Control, CPU Current %, LLC, and speedstep. One guide says one thing and another guide says the opposite, just adding to the confusion! Do these settings ultimately just come down to trial-and-error until I find what works for me, or should I have them set a certain way and I've been reading misinformation? Just seems like a ton of variables for a trial-and-error method.

Thanks!
post #2 of 8
The best information about SB OCing (and the only one I trust) is the info from Munaim in the Sandy Stable Club (check my sig for link). His advice got me to 5GHz at about 16 hours stable.

Also, just clear up what might be a misconception, in your example, your offset would be -0.0811. Make sure you set it to subtract, not add. However, your mobo should go much higher than that. My offset is +0.12V, and I'm also using a P8Z68 (though mine is the Pro version, it shouldn't matter I don't think).

Unfortunately, when it comes to PLL and VCCIO voltages, it very much is trial and error. The other settings are all described in the Sandy Stable Club info.
post #3 of 8
Quote:
Originally Posted by flipe View Post

Hello everybody. So while I *think* I've got most all of this understood, one major thing has me sorta stuck. Please correct me where I'm wrong.
I'm using an Asus P8Z68/GEN3 and an i5-2500k with 8GB 1333 RAM.
It is my understanding that to find your offset voltage, you run prime and check your VID using CoreTemp under 100% load. I know from using manual mode, that I was able to set a 4.5ghz speed and it was stable for a 12 hour blend at 1.315v. If my VID shows 1.3961, my offset would be 0.0811, right? That seems much too high, and my motherboard only allows an offset of 0.0640. So this is where I'm confused. I have no clue what I should be setting my offset value to be.
I also am reading a ton of conflicting settings concerning c-states, PLL, OC Tuner, Phase Control, CPU Current %, LLC, and speedstep. One guide says one thing and another guide says the opposite, just adding to the confusion! Do these settings ultimately just come down to trial-and-error until I find what works for me, or should I have them set a certain way and I've been reading misinformation? Just seems like a ton of variables for a trial-and-error method.
Thanks!

here is quick work around to find how much you have to change and how ;
"DVID Offset: With SB and SBe we have SVID, and SVID will change the VCore unless the VCore is explicitly set. At 4 GHz my VID will be 1.30v, at 4.1 it will then be 1.315v, at 4.3 it will be 1.335v. Setting DVID is setting a positive or negative offset onto that VID. The issue is that VID changes with frequency, so if you set a +0.100v offset, at 4GHz it would be 1.4v, at 4.1 GHz it would be 1.415v, and at 4.3 GHz it would be 1.435v. You can’t control the final VID on these CPUs, so I do not recommend using DVID offset, but if you want the voltage to drop when the frequency drops then you need to use it. Please set the maximum frequency you wish to achieve, and disable all power saving features (EIST, C1E, C3/C6 states). Then boot into Windows and then restart and go into BIOS. Your max SVID bin for that frequency should now be your VID. Set the offset off this voltage, and then save, that will be your max VCore. If you increase the frequency more, then do that again, SVID might or might not change the VCore."
http://www.overclock.net/t/1189242/sandy-bridge-e-overclocking-guide-walk-through-explanations-and-support-for-all-x79-overclockers
if you already know your stable manual/fixed Vcore ,try this ;
http://www.overclock.net/t/1219588/offset-mode-overclocking-starter-guide-and-thread
    
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i7 4930K Rampage IV Gene SLI Evga GTX 780 Classy 16Gb TeamX2400c9 
Hard DriveCoolingOSMonitor
Samsung 840 Pro/ Hitachi Deskstar 1TB  H20 (NexXxoS 420+280) w7x64 VG248QE 
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Logitech G110 SuperNOVA 1300 G2 G502 Proteus Core Foobar2K/WASAPI >NuForce Icon HDP >Crack with S... 
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post #4 of 8
Thread Starter 
Alright here's a quick update now that I'm actually home and can physically mess with stuff. I've been at work reading up on everything all day.

The guide I'm following seems to be working out pretty well, and it makes sense to me. Not sure if I'm allowed to link to a guide on another forum, if not please delete it from my post. http://forum.overclock3d.net/index.php?/topic/39090-offset-mode-overclocking-starter-guide-and-thread/

If I've got this right, basically after setting the base settings, it comes down to the lowest vdroop allowable with the offset. I've got a sheet of paper here that I've been following vcore with as I've changed the offset. With LLC at 75%, at -0.030 my vcore while idle at 1600mhz hasn't gone below 0.928. I'm not sure how long to let it sit idle, but I'd assume if it were going to BSOD it wouldn't take long. This is when I then open up prime and at full load I'm at 77c max temp and a low vcore of 1.360.

As long as I was doing it right the first time, in manual mode I was stable in prime for 12 hours at 1.315vcore. Does this mean I have a LOT of offset left, going from 1.360 @ -.030 offset all the way to 1.315? Going between an offset of -.015 and -0.030 my idle vcore went from .944 to .928 and load from 1.376 to only 1.360. Is it unrealistic to think I may reach an offset of -.100 or more? Or is this only going to go on until I bottom out too much at the idle vcore? (the latter is what I'm presuming, and in which case, that means my 4.5ghz is going to actually take more vcore using an offset than I could run being manually set?) If it does use more vcore from using offset, I can already tell that it runs hotter than after 12 hours prime @ 1.315. If this is the case, should I just bump it up to 4.6 or higher right now since its using higher vcore anyways?


Sorry for so many questions bundled up together, I just hope I'm doing this right. The manual way was straightforward but I like the benefits from using an offset and really want to get this sorted out. smile.gif

edit: one last thing, does it really matter whether or not I'm using 50% or 75% LLC? From what I understand and can tell, the higher the %, the more vdroop it "makes up for". When I tested at the offset of -.010 with LLC at 50%, my lowest idle vcore was .952 and with it at 75% it went down to .944. Is either one of these particularly better than the other? The difference seems so minor.
Edited by flipe - 2/23/12 at 4:06pm
post #5 of 8
Thread Starter 
Alright another update. After reading some of Munaim's posts, I saw where he'd pointed out that using 50% LLC and the offset method produced better results. This has turned out to be true, as long as I'm stable (which I should be according to my manual settings). I dropped my LLC down to 50% and an offset of -.030 and it gives me an idle low vcore of 0.912 and a load low vcore of 1.320. I know that 1.315 had me stable before and I crash below 0.904, so I should be right to expect it to be stable for me now, yes? So basically as long as my idle doesn't BSOD, I should be set. And if it does, I'll just drop my offset to -.025 and be good. So far I've had prime running at this setting with over 90% ram and no issues yet.

Man I hope I got this nailed. If so, I know that I've got headroom as long as I keep her cool!
post #6 of 8
Thread Starter 
Not workin out as well as I'd hoped. In the last hour I've had a x0a, x024, and an x124 BSOD. I may just put it to rest for the night and try again tomorrow.
post #7 of 8
Thread Starter 
I decided to not give up. After tweaking a couple things, I've booted back up and did 20 minutes of prime with 90% ram for lengths 1344 and 1792. I also ran another 30 minutes with 90% ram on 2688 while I played a rip of this week's big bang theory and all 4 workers passed 0 errors. smile.gif

idle vcore @ .968 and load at 1.320 seem to be the sweet spot for my 4.5ghz goal. I haven't topped 68c throughout my 3 mini tests so temps are lookin great. I'm gonna go ahead and run a custom prime with 90% and just let it run hopefully the full 18 hours, considering it passed the 2688 test.

Super Stable Club, here I come!
post #8 of 8
Thread Starter 
I like how this thread is like a worklog for my hit-and-miss efforts. I'm so close I can taste it. lol not bad for methodical guesswork!
Edited by flipe - 2/24/12 at 7:39am
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