[Solved] Sandy bridge max voltage opinions

lets hear it. what do you think the max safe voltage for a two year life span.

if you have personal experience that be best. lets try to keep this none biased and factual. and dont like 12 month old data.

personally i draw the line at 1.4 as long as the temps are under 70 degrees.

also a topic is does the max temp under stress testing matter or is it max operating temp the one that matter. so should people aim for under 70(or max good temp that you believe) degree stress testing or under normal operations?

you may want to read this
http://www.tomshardware.com/forum/ [...] 500k-fails

HostileDonut quoted
"Intel recommends 1.52v maximum for that CPU, and that is with a great cooler. I wouldn't go past 1.43v myself even if my temps are in the 60s load. 1.39v is a bit high for that OC. I run mine @ 4.4Ghz with 1.32v maximum and some people would say that is still a little high. Use a offset voltage instead of auto. At least the CPU is stable. Running 1.39v shouldn't hurt the CPU with those temps, as they are pretty good running Prime95, but you could probably get the voltage lower, making your CPU last longer"

Message edited by truegenius on 01-07-2012 at 10:24:53 AM

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Reply to truegenius

What i think and whats fact is probably not lined up exactly, but... i remember my older e8600 where everybody i met and talked to said anything over 1,4v would kill my cpu fast. So i tried to have 1,45-1,5v over 3 years without turning the computer off... had i off for like all-in-all 1 week on vacation. And i use it a lot, never was a problem at all.

My point being that i'm sure the sandy's can take much more than we think. I've only gotten mine this week, but been overclocking my mates computer. I think it depends a lot on the chip, but i would say with 1,45-1,5v you still have the chip working fine for a LONG time... Not necessarily a lifetime, but longer then you would have the chip before replacing it... But this is as long as the temps are withing reason and not like 70+all the time. I run a fairly big loop on my cpu (water ofc) and are seeing 60-65* @ 1,38-1,4v on load over time. They can probably take more than we think my 2 cents...

Message quoted 1 times

Reply to ottesen

ottesen wrote :

What i think and whats fact is probably not lined up exactly, but... i remember my older e8600 where everybody i met and talked to said anything over 1,4v would kill my cpu fast. So i tried to have 1,45-1,5v over 3 years without turning the computer off... had i off for like all-in-all 1 week on vacation. And i use it a lot, never was a problem at all.

My point being that i'm sure the sandy's can take much more than we think. I've only gotten mine this week, but been overclocking my mates computer. I think it depends a lot on the chip, but i would say with 1,45-1,5v you still have the chip working fine for a LONG time... Not necessarily a lifetime, but longer then you would have the chip before replacing it... But this is as long as the temps are withing reason and not like 70+all the time. I run a fairly big loop on my cpu (water ofc) and are seeing 60-65* @ 1,38-1,4v on load over time. They can probably take more than we think my 2 cents...

judging by those voltages your at around a 4.7 overclock?

Message quoted 1 times

This is the article you should read. Anything over 1.4v seems to kill Sandy Bridge CPUs pretty quickly due to electromigration.

http://www.tomshardware.com/review [...] ,3048.html

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Reply to anort3

cbrunnem wrote :

judging by those voltages your at around a 4.7 overclock?

My mobo is faulty so i can't change voltage on mine now, so i'm running on "auto" which gives me 1,37-1,39v @ only 4,5ghz... My mobo is so faulty so i don't dare to restart my computer...haha. Will be talking to the guys where i bought it in a few days.

On the other 2500k i clocked we have 4,5ghz @ 1,29v rock stable. Did some easy benchmarking at 5ghz with 1,39v Seems like a good chip

Message quoted 1 times

Reply to ottesen

ottesen wrote :

My mobo is faulty so i can't change voltage on mine now, so i'm running on "auto" which gives me 1,37-1,39v @ only 4,5ghz... My mobo is so faulty so i don't dare to restart my computer...haha. Will be talking to the guys where i bought it in a few days.

On the other 2500k i clocked we have 4,5ghz @ 1,29v rock stable. Did some easy benchmarking at 5ghz with 1,39v Seems like a good chip

it seems that i5's overclock with a lower voltage cause of the lack of hyperthreading....

Best answer

If someone is actually expecting to get 2 years out of their Sandy using it 24/7 I'd say stay well below 1.40v preferably below 1.35v should be very safe, most 2500Ks will run 4500mhz in the 1.300v ~ 1.330v range.

Presently 4500mhz will do whatever you need it to do, so there's really not much reason to clock it any higher once you satisfy the curiosity of reaching the higher clocks.

Of course it also depends on how hot your CPU is running 24/7 at 4500mhz with the voltage it takes to achieve stability, the cooler the better so that's also an important factor.

It also depends on whether you're running stress tests all the time as some out here seem to think that's a daily duty, stress tests are to reach a stability point then stop running them as they are shortening the life of your CPU.

If CPUs had a MTBF rating in hours then what I just wrote would be easier to understand, if say for instance a cooling fan is rated MTBF 50,000hrs @ 12v but you decide to run yours at 14v, do you think the fan will still last 50,000hrs.

Well you could actually say that you have 26,280 hours before your warranty runs
out, but some on auto voltage are running higher voltages than those of us manually overclocking, hmmm, could that be a problem.

Curious that your M/B warranty runs out before your CPU warranty does and your M/B is what's actually regulating that extra auto voltage,and cooking up your CPU!

Well you did ask for opinions.

Everything on this planet has an end, the key is how fast will you reach it?

Are voltages left on auto good or bad there's something to argue about, IMO when voltages are set manually they're fixed at a certain level, voltages on auto fluctuate sometimes going to extreme levels to keep the computer from crashing and catch up to what's going on.

It may seem the safest route and easiest to accept and be pleased with but sudden electrical surges are not good no matter how low the voltages are, especially when some of their peaks are way past what you'd like to safely use daily.

Some motherboards run auto voltages way higher than needed, but they never designed the things to run forever if they did you wouldn't need to buy another, and they'd go out of business.

Message edited by 4Ryan6 on 01-08-2012 at 09:11:46 AM

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Reply to 4Ryan6

I agree with ryan. My reasoning:
Max recommended voltage for 65 nm CPU's: 1.50 volts.
Max recommended voltage for 45nm CPU's: 1.45 volts.
Max recommended voltage for 32 nm CPU's: I would not go higher than 1.40 volts.

Reply to jsc

Best answer selected by cbrunnem.

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