Sandy Bridge Vcore.

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Pickster

New member
Hi guys, me again.

I'm curious as to what sandy bridge folders have as their max vcore, while folding that is.

I'm currently trying to figure out where the instability is on my main rig, I thought I had ruled out vcore, but ..... well I decided to ramp it up (to 1.440v) well beyond deafult and it is sitting comfortably at 4.6ghz.

I don't intend to keep it that high, but really if I could get some data on what different people use, I can use that with my own data to find a good middle ground.

Overall I'm not scared of high temps since the CPU will throttle itself at 98c (so Intel are fine with their chips getting that high), so its a noise/heat/speed balance that it looks like I'm trying to find.
 
seumasbeathan said:
I can't say personally but I believe that anything over around 1.38 is not recommended
Click to expand...

There doesn't seem to be any solid info.

That's why I'm wondering what people who are folding on their sandy bridge are running. For me heat will be an issue before anything else as I hate noisy PCs.

I don't exactly care what's safe, more what seem to be roughly a good voltage to be running while foldibng 24/7
 
Yeah anything below 1.4v is fine as long as the temps are reasonable. I like to keep my temps below 70, which is why my CPU is only at 4.2Ghz.
 
The maximum vid for sandy bridge gen 2 i7 is 1.52 volts.
It's in the intel datasheet for the processor range.
 
Well it's different for every chip really. But for the sake of a couple of hundred mhz, I wouldnt really want to risk it. There was a user here who was running his 2700k at 1.48v and suffered degradation of 0.02v every month after 6 months use. ie - every month he had to increase the voltage 0.02v to keep it stable at the same clock. So if you do experience it, your PC will just end up bluescreening so you'll have to increase the voltage and prime run again... Bit of a waste of time and money IMO.
 
leejc73 said:
Not according to intel. They state it as acceptable voltage range.
Read http://www.intel.com/content/www/us/en/processors/core/2nd-gen-core-desktop-vol-1-datasheet.html
Page 80 gives vid range, there is a register on the chip, all bits set to F=1.52 volts.
If we used them with a 1.52 volt supply and killed 100's then intel would be replacing them. We fit them to sbc/powerpc's.
Click to expand...

No.

Intel say that as in, if you run your chip at the stock speeds, with volts at 1.52, it will survive the duration of the warranty. They dont account for overclocking in the manuals...
 
I personally would expect the 1.52v range to be in relation to tempory extra power for Turbo mode, where by, for a short duration the chip can exceed it's maximum power threshold.

That's not really worded very well but hopefully you get what I mean.

This is why I was wondering what other folders have been running as folding is pretty stressful on the machine and if there was chip degridation they will know.
 
Chips run at over 1.4v for 24/7 shall see performance degradation due to electromigration. Keep it under 1.4, and all should be dandy.
I believe there's a slight leeway if the chip is underwater, though.
 
The reason I wouldn't advise anyone to run above around 1.45 volts is not due to chip degradation (which given the nanometer tech would be hard to conclusively prove) but more to do with fluctuations of the supply and the capabilities o the motherboard vrms. Atx spec is 5 or 10% variation vrms will also have a tolerance.
 
James how can you quote stock speeds?? Intel include the K series unlocked multiplier processor within that datasheet!!!
 
Pickster said:
I personally would expect the 1.52v range to be in relation to tempory extra power for Turbo mode, where by, for a short duration the chip can exceed it's maximum power threshold.

That's not really worded very well but hopefully you get what I mean.

This is why I was wondering what other folders have been running as folding is pretty stressful on the machine and if there was chip degridation they will know.
Click to expand...

Sorry for the double post, but attempting to merge this quote with my last post on iOS would be the end of me. (edit: nvm, iOS is so laggy it wasn't even a double post -.-)
There's no way the standard turbo presets would need 1.52v.
 
It's not hard to prove... We arent talking about taking the chip to pieces under a microscope - it shows in the fact that the cpu stops running at the volts it once was, and needs more and more to power it.
If you want to go and run yours at that kind of voltage, then do it - but as you say, it's hard to prove degradation - it's hard to disprove it too. So do it yourself, but dont advise others to run at a higher voltage, or give them a possible false hope of things being fine when it could very well kill their chip.
 
Im not advising anyone to run at any voltage. He asked what the maximum voltage was for sandybridge. Which is precisely what I supplied him with. What he chooses to run at is entirely his choice. Just out of interest did the person who had to keep increasing his voltage do a complete and thorough component test on his vrm's to ensure the issue was processor related without any possible other cause???
 
Nope - didnt seem to care that he'd lost a couple of hundred quid by killing a processor.

Anyway, this thread is starting to capitulate so I'm not posting anymore. If you two want to kill your chips, or even risk killing them, that's up to you. Josh and myself have said 1.4v to be safe, and I really wouldnt be going over that unless your investing in some expensive watercooling
 
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