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i7-2600k suddenly requires more power? - Page 2

post #11 of 22
Seems to be common issue. You guys sure 1.4volts is safe?
post #12 of 22
It's SAFE, but you may or may not have degradation. As I mentioned above, the bad clockers seem to suffer more from degradation than the better clockers. Someone lost 400 mhz on their clocks after two months of folding 24/7 at 5 ghz 1.5v.

Also, max VID is 1.52v, and VID is not vcore, this the max voltage identification set in the BIOS, and this assumes you are following Intel's loadline specifications, meaning you are not using loadline calibration. Believe it or not, that is exactly why the max "24/7 SAFE voltage" was rumored to be 1.38v back in January, and that poster got wrongly flamed for it. But now it's turning out that he is right. Because 1.52v in BIOS + NO loadline calibration is around 1.39 to 1.40v after vdroop.

So it makes perfect sense. Anyone saying 1.52v is the max safe voltage, doesn't know the difference between VID and vcore. And frankly, I'm one of those people who didn't, either...I ALWAYS Assumed max VID was the same thing as max vcore. I assumed that for YEARS. Since back in the pentium 3 days, VID was Vcore, as there was NO loadline slope back then. All you have to do is look at the Intel specifications to show EXACTLY how vdroop is supposed to work. Yeah, it requires someone with EE experience to actually understand what the charts are showing (relationship between volts, amps, and loadline), but it's all quite logical in the end.

Reading up on the VRD 12 specifications is pretty educational, IF you can actually understand the stuff...

Loadline calibration is going OUT of specifications. I'm not saying don't do it, nor am I saying don't run the chips past 1.4v of load--but if you do that, it's all YMMV. All I'm saying is the specs. That's all
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post #13 of 22
I don't remember the last time a cpu got that much attention when it came to degrading it lol

are you sure you was even stable at that voltage? What did you use to check for stability?
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post #14 of 22
Quote:
Originally Posted by Falkentyne View Post
Chewy, my chip didnt degrade at 1.236v at all at 4.5 ghz. It ONLY degraded after repeated runs at 5 ghz at 1.41v. That degraded 1.236v also. 1.236v NEVER degraded (not for 2 months!) until I started priming at 5 ghz....

Now it needs 1.260v . Raising PLL voltage doesn't exactly remove the 0x124 BSOD at lower than 1.254v, it just makes it take much longer to occur. At 1.254v, raising PLL made it get a roundoff error after 5 hours. I STILL need 1.260v for 12 hour blend stability, irregardless.

Raising PLL helps the idle BSOD's at 5 ghz, even though my CPU STILL needs more vcore than before.

And as i said, my worse (higher vid, much worse clocking) chip, degraded a LOT, since it needed like 1.48v from the beginning, and NOTHING helps it except vcore. Nothing. I've tried EVERY possible thing you can do and the ONLY Thing it responds to is vcore. Proof of that is 0x101 errors instead of 0x124, even at 4.5 ghz (unlike the first cpu).
I hear what your saying. Have you tried a different motherboard?. No one ever thinks that perhaps the phase signal voltage changes or degrades over time??

In many instances with supposedly degraded cpu's new motherbaords have brought them back to life like they were new.

Just an idea ? It seems more likely to me as these new 1155 boards are packed with digi vrm etc these problems now seem more evident whereas in the past with regular boards this was not the case and my old cpu's are still kicking silly voltages and heat after 3+ years on my 775 rigs, Cpu's just aren't that weak
Edited by Chewy - 5/26/11 at 4:14am
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post #15 of 22
I already swapped motherboards once, and tested the more degraded CPU on both boards--it was pure CPU at fault. I shoudn't have to do it again, and I'm not made of money, so I don't have spare motherboards of the same chipset sitting around (yet look who's talking, I have two 2600k's...self facepalm....but please don't tempt me....i don't want to waste even MORE money on hardware, considering I'm disabled ...) Especially when the first swap (b2 to b3) did NOT affect how much the first (bad clocker) CPU had degraded. That chip was pure 100% degraded, because it did NOT gain or lose any clocks with the B3 swap.

Since the second chip has a lower default VID, and is a better clocker, and also degraded (a lot less than the first, though), I don't think the motherboard is at fault. Remember I said that raising the PLL voltage does NOT make voltages under 1.260v blend stable at 4.5 ghz? It only raises the amount of time (quite a bit, though) it takes for the incoming BSOD (only exception was at 1.248v PLL 1.88v, caused roundoff instead of BSOD after 5 hrs). With or without the PLL boost, the vcore needed for stability remained the same. The main benefit was at 5 ghz with the LLC2 (not needed with LLC1, which has vdroop)

Remember I also said that the first CPU does **NOT** respond to PLL voltage changes at all (at least not from what I can tell...it sure doesn't make it any more or less stable...) so its definitely a YMMV thing again (every cpu is different).
Edited by Falkentyne - 5/26/11 at 5:27am
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post #16 of 22
Thread Starter 
Update
Hey guys really appreciate the quick and informative responses. Sorry for this late update I spent the whole day without my computer as it didn't boot up past the boot screen.
Long story short, turns out there was nothing wrong with my computer, it was just my ridiculously newbish settings were trash to begin with. Read an article in this forum named "The ULTIMATE Sandy Bridge OC Guide + P67A-UD7 Performance Review" by Sin0822 (+rep!) and I now have a reasonably oced 2600k.

Cpu
-4.5Ghz (100*45) 24/7
-1.31v 100% LLC
-PLL overvoltage enabled & set to Auto
-HT enabled
Ram
-1600->1866Mhz
-8-8-8-24-T1
-1.65v
Temp
36 Idle. 70 load.

Those are simply an outline of my current settings. I will not post any more details as every computer is different.
Edited by Dust - 5/27/11 at 12:49am
post #17 of 22
Dust check your PM and steam
BTW do you need PLL Overvoltage enabled at 4.5 ghz? What happens if you disable that?
Edited by Falkentyne - 5/27/11 at 12:54am
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post #18 of 22
Thread Starter 
Added (:
post #19 of 22
Thanks I'm getting owned by headshots with para in AVA right now.
I ask if PLL overvoltage is enabled or not, because if you don't need it for that mhz (only the worst cpu's need it just to get X45 multiplier to work, that means you can't go beyond X49 as an absolute wall), you will go into a boot loop if you accidentally go into sleep mode (and you'll have to clear the cmos to get out).
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post #20 of 22
Thread Starter 
Ahh okay. Anyway I have been really into this whole overclocking thing and I think I'm getting the hang of it. Which is also why I haven't gotten my game on (soon bro. soon). Right now at 4.7 (44*107). Probably going to push for 4.8 once I learn the limits of my ram sticks.

New question though, What is the max temp you guys allow your respective processors reach?. I ask this as Prime95 is making my temps reach 80 degrees and my nerd heart is starting to cringe..
Edited by Dust - 5/27/11 at 11:37am
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