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So I've been fiddeling around with this...

post #1 of 7
Thread Starter 
I posted earlier in the forums and Kennyparker updated the guide because of the error in the "offset 0.05" increment vs 0.005.

Anyway, I tinkered around with overclocking my i7 2600k on fixed mode and offset. I couldn't really get anywhere with fixed mode despite being Stable on 100% LOAD, the CPU would blue screen while idling....

...So I've been trying offset mode and managed to figure out the psychology behind it at this point.


So, I just want to make a suggestion, I would like the guide owner (KennyParker) to explain in the voltage section that using an offset of 0.005+ is good, but most users will probably need or would benefit from a negative OFFSET, since the CPU vcore by default, is bumped UPWARD by the motherboard.

For example, if you run 43x multiplier or rather 4.3ghz overclock on the i7 2600k, but you leave the vcore voltage on AUTO, the motherboard will bump up the vcore to around 1.300-1.375.

NOW, I"m not sure why the motherboard does this (maybe someone can enlighten us), I know from information regarding the VID on CPU's, the CPU is programmed to dissipate a certain voltage at certain levels, though the manual control of the "VCORE" truly dictates the VOLTAGE the CPU receives via the USER (which explains the primary difference between VCORE vs VID)

So people on here, leaving the offset on 0.005+, and running 4.3ghz + overclock, are surely going to be getting vcores of 1.3v+++, and temperatures getting close to 70°C, when ASuS reps regarding overclocking (Jose on Hard Forums/NewEgg TV) recommend that ~4.4ghz can be done on 1.240-1.280vcore, while 4.4-4.8ghz need be done on 1.300-1.375.....


Anyway, I'm running a negative offset of -0.100v with LLC at level 3.

That was the LOWEST I could get without blue screening (i.e. LLC 4 blue screens me prior to booting, and -0.105v blue screens me also).....

So we will see, my temps are at 61C loading on prime 95, and I will try to bump multiplier up after this.

I'm more worried on idling honestly, since I have no problem passing 100% load tests via prime95 or IBT. Usually I bluescreen 1-2days later while watching youtube or idling, which I further suspect was of voltage fluctuations when I was in fixed mode a few weeks ago.

I hope this offset mode to be the remedy.
post #2 of 7
... what?
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Warchief
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post #3 of 7
I can make sense of parts of this but you might want to clean it up a bit. I'm running +.005v on a 4.2ghz OC and my voltage never goes above 1.28 and is usually around 1.24 (Not quite sure why but in games it's 4.2ghz @1.24 and P95 4.2ghz @1.28). But you say it will be hitting 1.3v+. So there's that.
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post #4 of 7
Offset might solve your problems, although there are other variables beyond vcore voltage.

I was able to et a stable OC after messing around with VCCSA, dram etc.

Anyways, good luck. I'd rather use offset than fixed voltages anyday.

If you BSOD, post your complete bios settings and we might be able to help.
    
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post #5 of 7
Thread Starter 
Oh whoops.

I actually meant this thread to be a reply post on the "Overclocking Sandybridge guide in ASRock motherboards..."
post #6 of 7
Thread Starter 
Quote:
Originally Posted by alexmaia_br View Post

Offset might solve your problems, although there are other variables beyond vcore voltage.
I was able to et a stable OC after messing around with VCCSA, dram etc.
Anyways, good luck. I'd rather use offset than fixed voltages anyday.
If you BSOD, post your complete bios settings and we might be able to help.

True, I think I have it corrected now that I entered offset mode instead of fixed mode.

I messed with all the C states in fixed but it would not be stable, then I heard it's the voltage SWITCH from idle to load (the variation) that causes the blue screen.
post #7 of 7
Thread Starter 
Quote:
Originally Posted by Ghooble View Post

I can make sense of parts of this but you might want to clean it up a bit. I'm running +.005v on a 4.2ghz OC and my voltage never goes above 1.28 and is usually around 1.24 (Not quite sure why but in games it's 4.2ghz @1.24 and P95 4.2ghz @1.28). But you say it will be hitting 1.3v+. So there's that.

Yeah but IMO +0.005 offset is actually too much for that Vcore.

The motherboard always over compensates for voltage when you use the "AUTO" option and same with offset. I think any overclocker will attest to that, that's why most would find the max overclock frequency with the lowest Vcore that would support as to avoid Chip degradation and such.

I could probably do a higher frequency on this offset of -0.100v in stead of 4.3.ghz, but I'm just testing right now.

And I had everything stable at this setting so far, at it hits max vcore of 1.220-1.240 under 100% load, otherwise it idles at 1.000v at 1600Mhz etc...

So I may try to bump it to 4.4GHZ +++ on a 1.240-1.3vcore while I noticed alot of people are stopping at 4.3-4.4ghz because the temps get too high, but the Guide sort of misinformed them by recommending a 0.005+ offset which is just adding a "thousandth" of an increment of voltage to your voltage designated by the CPU which might be already too high!

Hopefully some people get that, but for some reason it seems like some don't.
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