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[Poll] What is the Maximum Safe 24/7 Voltage for Sandy Bridge? - Page 3

Poll Results: What do you believe is the maximum safe 24/7 voltage for 32nm Sandy Bridge processors?

 
  • 2% (3)
    < 1.325 volts
  • 0% (1)
    1.325 volts
  • 8% (10)
    1.35 volts
  • 5% (7)
    1.375 volts
  • 21% (26)
    1.40 volts
  • 2% (3)
    1.425 volts
  • 20% (24)
    1.45 volts
  • 3% (4)
    1.475 volts
  • 22% (27)
    1.5 volts
  • 12% (15)
    > 1.5 volts
120 Total Votes  
post #21 of 45
Quote:
Originally Posted by kennyparker1337 View Post

If one chip can do 1.52v safely, then they all can. If you have a low VID chip, then it simply means that you require much less volts to be stable at stock; it doesn't set a limit for your chip.

Good point and one that is the structure of this argument.
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post #22 of 45
those are SVIDs operating ranges, DVID has the same type of table.

VID equates to the range of voltages which the processor might be given at stock, so your VID would be probably like 1.25v, SVID increases your VID automatically, but it tops off around 1.44v as in I have never seen VID exceed 1.44v on its own through the mechanism of SVID. .

Page 72 on your document:
Quote:
The processor uses three signals for the serial voltage identification interface to support
automatic selection of voltages. Table 7- 1 specifies the voltage level corresponding to
the eight bit VID value transmitted over serial VID. A ‘1’ in this table refers to a high
voltage level and a ‘0’ refers to a low voltage level. If the voltage regulation circuit
cannot supply the voltage that is requested, the voltage regulator must disable itself.
VID signals are CMOS push/pull drivers. Refer to Ta b le 7- 9 for the DC specifications for
these signals.
VID range is only up to 1.52v because SVID has the capability and that is over and beyond what Intel felt they could program allowing enough room for OC.

Intel never specified a maximum vAbsolute or max VCC which would be considered max vcore. VID isn't Vcore.

For SBe Intel does the same except defines everything. THey actually said max is 1.4v for vabsolute for SBe in their datasheet. This past week at CES i talked to their OC engineer again, he told me 1.4v sounded a bit low to him as Vabsolute, he was going to look into it.

I have had MANY CPUs go above 1.5v all of them showed signs of degradation, when you always hoot for the max multiplier and you use over 1.5v you feel that you need more and more volts to boot into windows, i would never recommend to someone that they do so for 24/7.
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post #23 of 45
Quote:
Originally Posted by Iislsdum View Post

I created the thread to get some hard numbers

these numbers will be very much worthless

around 10% of the people answering will have found some sort of number in the spec sheet
around 5% of the people answering actually run the voltage they say
everybody else will just be echoing what they heard somewhere (most likely in this very forum)
less then half the people answering actually have a SB cpu

but just to recap: there is no published "max safe voltage" for SB cpu's, there is no statistical data on the longevity of SB cpus under various amounts of voltage and conditions, there is no hard evidence whatsoever except for the few cpu's that have died @ extreme ln2 runs and such. People throw around the word "degrade" a lot, i've yet to see a single case of sb degradation, There is a max safe voltage published for both gulftown and SBE (as close as you can get to sb in terms of process / architecture) and that is 1.4v under ideal conditions.
post #24 of 45
Thread Starter 
If I'm not mistaken, 56 is the maximum multiplier on Sandy Bridge chips. Does that mean that all chips can do 5.6 GHz? Obviously not. Just one more reason why I don't believe the maximum VID (or SVID) to necessarily be safe.
Edited by Iislsdum - 1/15/12 at 12:46pm
post #25 of 45
its actually 57x and the ES had 59X which was also introduced just like th max mem multi is 21.33 but ES CPUs could use 24.00

Dude what are you talking about Sandy Bridge Voltage degradation doesn't exist, I have seen it happen in front of my eyes when i was first working with SB to write my guide, one week i needed 1.5v to do 5.2ghz the next week i needed 1.53, the week after i needed 1.55v and that is when Sb released. I am sure my ES went through some gruesome testing before hand(At least it had no whole drilled into it for a temp probe like my buddy at HWC had done to his ES CPU), but around the 1.52v range will cause the need for more voltage after a while. It is typical of SB CPUs, 32nm doesn't hold up well and I bet it will become worse later. you just don't' see too many people running 1.5v+ 24/7 or testing enough at that volts.

But whatever in a week or so Intel will release news, and then it doesn't matter how much voltage you put into your CPU, you'll get a paid pass.
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post #26 of 45
Quote:
Originally Posted by Sin0822 View Post

But whatever in a week or so Intel will release news, and then it doesn't matter how much voltage you put into your CPU, you'll get a paid pass.

What do you mean intel will release news, care to elaborate a bit more please ? i'm not as savvy as some of u guys here tongue.gif
Since you seem pretty clued up in the subject Sin, in you're experience what would you say the max safe volts is to run ? 24/7
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post #27 of 45
Quote:
Originally Posted by Sin0822 View Post

Dude what are you talking about Sandy Bridge Voltage degradation doesn't exist

i didnt say it doesn't exist, i just said i havent witnessed it myself, neither has the vast majority of people who say things about degradation. This sentence(and most of my post really) was more aimed towards the reliability of the internet than the actual attributes of SB chips.
post #28 of 45
I've had my 2500k since SB came out and it's been at 1.505v manual ever since without any sign of degradation. It's also running on a measly 212+ HSF, but it does keep the temps down just fine wink.gif
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post #29 of 45
There is no such thing as a "safe" voltage. It's really whatever your comfortable with. You want to minimize risk? Don't overclock then. All chips degrade eventually. Overclocking just tends to shorten that lifespan.
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post #30 of 45
Quote:
Originally Posted by Comatosed View Post

What do you mean intel will release news, care to elaborate a bit more please ? i'm not as savvy as some of u guys here tongue.gif
Since you seem pretty clued up in the subject Sin, in you're experience what would you say the max safe volts is to run ? 24/7

I can't comment, but i was told they would say something soon like tomorrow or later this week. just keep your eye out.
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