Safe max vcore v

spankingtexan

spankingtexan

spankingtexan

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What is the maximum safe voltage? I've heard different opinions on this and I'm a little concerned as my overclock in sig is using 1.4v full load, 1.38v idle, is the full load volts too much?
 
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From OcUK:

***OVERCLOCKING GUIDELINES***

- Do not exceed 1.425v core voltage, doing so could limit lifespan of the CPU
- Aim to keep temperatures below 70c underload if at all possible
- Do not overclock with BCLK, again doing so could limit lifespan of the CPU
- Recommended memory voltage is 1.50v, so make sure to run your memory at 1.50v, higher than 1.60v could limit lifespan of the CPU
- These recommendations come from OcUK and Intel, your warranty is un-affected but we highly recommend you adhere to the above to make sure your CPU lifespan is un-affected
- All Sandybridge CPU's worldwide should be run at the above or lower voltages, no higher!
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Thanks guys, tbh I'm not the brightest spark when it comes to overclocking, in fact my cpu was part of a pre overclocked bundle from ocuk, I got it at 4.6ghz and all I did after fitting a new cooler is increase the multiplier from 46 to 48 and that was it, that's all the cpu overclocking experience I have.

I noticed the vcore had increased from 1.38v at full load to 1.4v so I'm assuming there is an auto setting in the bios for the vcore and that it has increased itself after my tampering with the clock speed. Do you think I could set the vcore manually and lower the voltage or would my overclock need that bit of extra juice. Surveyor has kindly posted the voltage recommendations and the upper limit is a little higher than what I have so not so concerned now but as everyone says, lower is better.

My temps at the setting in sig is low 30'sc idle and maxes high 60's after a couple of hours under prime.
 
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You get different opinions because there is nothing concrete even OCUK's figures are contradictory, they list 1.35V-1.38V as max for 2600K/2700K but 1.42 for 2500K, whatever the magic figure is those CPU's should be no different.

You just have to weigh up the risk and how long you intend to keep it and then cross your fingers. :p
 
mmj_uk said:
You get different opinions because there is nothing concrete even OCUK's figures are contradictory, they list 1.35V-1.38V as max for 2600K/2700K but 1.42 for 2500K, whatever the magic figure is those CPU's should be no different.

You just have to weigh up the risk and how long you intend to keep it and then cross your fingers. :p
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Ummm, interesting, it would appear there is no absolute certainty on max volts, indeed I,ll keep my fingers and legs crossed, have tried crossing my eyes but it's like playing a game in 3D without the goggles lol.
Wonder if ocuk would like to comment on the three different max volts they have recommended?
Thanks again guys
 
about a week since i went water cooling so not long but b4 that i had a corsair A70 with 4.6 with vcore 1.38 at full,I got 5gig but it needed way 2 much vcore 1.6 so settled for the 4.8
 
Rusty0611 said:
If your temps are in check you can go higher but personally anything approaching 1.45V I wouldn't run 24/7.
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I've got 8 of these machines in a datacentre running at 1.440 vcore 24x7 @5.1Ghz with them doing 100% cpu for around 10 hours a day, 5 days a week. They've been in production for about 12 months, no problems at all. 1.425v vcore is ABSOLUTELY FINE - and at this you should be able to get 4.9-5.0Ghz easy.
 
spankingtexan said:
What is the maximum safe voltage? I've heard different opinions on this and I'm a little concerned as my overclock in sig is using 1.4v full load, 1.38v idle, is the full load volts too much?
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am running @ 4.9=1.42v 24/7 (well almost)full load and temps are well within the limit
did a 12hr straight bf3 game the other night with no problems untill battlelog did maintance lost all my points **** happens.

at 4.8 i would off throught you should be around 1.38v.
i found that with mine if i need to jump up say 4.8 to 4.9 i had to increase the vcore by 2v.i ran at [email protected] that is what i needed to be prime stable for 5.1 24/7

just a idea
 
chillidog said:
am running @ 4.9=1.42v 24/7 (well almost)full load and temps are well within the limit
did a 12hr straight bf3 game the other night with no problems untill battlelog did maintance lost all my points **** happens.

at 4.8 i would off throught you should be around 1.38v.
i found that with mine if i need to jump up say 4.8 to 4.9 i had to increase the vcore by 2v.i ran at [email protected] that is what i needed to be prime stable for 5.1 24/7

just a idea
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Yep, bios vcore is set to 1.38v manual, and cpuz reports this too with the 4.8Ghz, it's just that as soon as i put a load on, cpuz shows vcore at 1.4v. I have also clocked to 4.9ghz with no rise in vcore, still at 1.4v in cpuz but set at 1.38v in the bios, 4 hours prime and stable as a ****** max temps late 60's.

So, how does my computer increase the vcore from 1.38v in the bios to 1.4v when it's loaded?
Just curious, are you using as an exhaust or intake with your cooler?
 
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Here are some useful links to get you started:

- Sandy Stable Club

- Munaim1's Overclocking Guide for SandyBridge

- Raja@Asus's Z68 BIOS Guide - BASIC~Intermediate Overclocking



Also, I found this useful:

munaim1 said:
*~*MAX SAFE VOLTAGE & TEMPS*~*


Before I go into this, I just want to say that this is my OWN opinion and take it as you will.

No one is absolutely certain of what the safe vcore is for the sandybridge chips. What I can tell you is that many say the max safe vcore for these chips are 1.3 region, however, intel states that the max 'VID' is 1.52 and many say that around 1.4 if your on air and 1.45 should be the max if your running water cooling. Personally I will not go above 1.5v for 24/7 with these chip but that is totally upto you. The main thing to understand is that 'YOU' have to come up with the conclusion of what the max is. That way no one is blamed if the chip degrades (none reported so far, even with so called 'high 1.4+ vcore')

Those that have killed or degraded their cpu's have done so through either by their own fault, running sucide runs with crazy voltages and by not having substantial cooling for their overclocks and voltage or for reasons like their mobo or PSU causing shorting and also BIOS bugs.

Please remember that not all chips are the same, some can do high overclocks with low voltage some cannot as you can see in this this thread and many others.

Regarding temps, CPU throttles at 95c, some say keeping it below 85c is good, some say keeping it below 80 is better, other's say below 75c is really good and there are quite a few that say 70c should be the max. Which ever one your comfortable with and if you have substantial cooling, YOU DECIDE YOUR MAX, just remember it throttles at 95c. If for example you hit 85c in stress testing then in everday usage it shouldn't be higher than 75c which I think is fine, I personally like to keep mine below 70/75c during general everyday usage
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