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Some 1 talked with intel have a read.

Dazboots

Dazboots

Dazboots

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some said 1.35v some 1.38v and some 1.45v so I really had no idea so I talked with someone from intel to confirm this and here is the conversation:


You are now chatting with 'Brian'
Brian: Hello. Thank you for using the Intel Customer Support chat service. We are glad to be of service. How can I help you today?
[email protected]: Hi
[email protected]: I want to know what is the max safe voltage for sandy bridge?? no one really seems to know that, thx
Brian: Do you have the model number of one of the Intel products?
[email protected]: you mean i5 2500k?
Brian: I am going to transfer you over to the technical department and they will continue with the process.
Brian: Please hold.
[email protected]: ok thx
Please wait while I transfer the chat to the best suited site operator.
You are now chatting with 'Dago'
Dago: Hello. Thank you for using the Intel Customer Support chat service. We are glad to be of service. How can I help you today?
[email protected]: Hi
[email protected]: I want to know what is the max safe voltage for sandy bridge?? no one really seems to know that, thx
Dago: let me check, the processor specifications, please wait
Dago: this is the processor page, now let me check your inquiry:
Dago: http://ark.intel.com/Product.aspx?id...he,+3.30+GHz)
[email protected]: I cant find any volt values?
[email protected]: the intel specs says 0.025v - 1.52v range in volt, but 1.52v just cant be safe for 24/7
[email protected]: some says 1.38v too but I want a official max safe volt from intel, dont you know the max safe volt ?
Dago: I am checking the datasheet, please wait sir
[email protected]: ok thx
Dago: let me confirm, are you looking the max safe voltage for the supported ram or for the processor cores?
[email protected]: not ram, I want to know the vcore for the processor
[email protected]: max safe
Dago: ok fine, I am checking
Dago: thanks for your patience
[email protected]: np
Dago: please check page 78 of the following document:
Dago: http://download.intel.com/design/pro...hts/324641.pdf
[email protected]: ok
[email protected]: yes it is this I mean, MAX = 1.52v, but for 32nm, that just can be a safe volt for 24/7 ?? Shouldnt it be much lower ?
[email protected]: I mean wasnt the previous 45nm max = 1.45v or something like that?
Dago: those are the specifications for this processor, the VID is (0.25) min and (1.52) max, and it is safe for 24*7
[email protected]: ok Thx, so 1.52v for 24/7 is safe
[email protected]: yes or no
Dago: yes
[email protected]: Thx!
Dago: Is there something else I would be able to assist you with?
[email protected]: no sir, this was what I want to know! thx
Dago: Thank you for using chat. We value your suggestions and would appreciate it if you would take a moment to complete our survey. The survey will appear when you click "Close'' to close the chat window. Have a nice day.


just pulled this up from another forum. im wondering if i could got to 1.45 on cpu if its cooled on water. makes u wonder.

just to let u know this was not me but some1 else. ;)
 
If anything, Intel's intial data sheets play it safe with voltages.

This was definitely the case with 1156 i7. Original specs were 1.21 VTT, 1.65 ram, then they bumped it up to 1.45 VTT, 1.8(?) ram.

It'd be interesting to see how much testing they've done at 1.52v, given the SB issues...
 
eurgh all that text speak and poor english, surprised the intel technician had any idea what was being said to him.

On the other hand though, i'd like to see one set at 1.52v for 24 hrs with prime or something running for the full 24 hours
 
Don't forget the power consumption increases very quickly with increased volts. Several tens of watts for 0.1 or 0.2 increase.
 
mhh that's strange well someone could try it if they dont mind rma the chip later :)

edit: then i guess there is no problem if you using 1.4 ~1.45 to get 5 ghz.
 
I've run 1.5v+ through mine quite regularly i5 2500k with watercooling. I am sourcing new fans for rad and possibly new rad as temps were about 85c.
 
oh god, people even if the conversation is genuine, you'd risk your chip on what a level 1 tech support guy would answer, when judging by the majority of his answers he barely knew what was being asked.

In the vast majority of situations the answer is very clear, seemingly lots of people are hitting a massive wall in clock speed despite loads of extra voltage, are you really going to notice 200Mhz in anything but a benchmark? Is it worth an extra 0.1v, 5-10c, louder fan to get 100-200Mhz you won't remotely notice?

Sure, if you love benchmarking, run 1.5v through it for a while, but 24/7 why bother.
 
mrbios said:
eurgh all that text speak and poor english, surprised the intel technician had any idea what was being said to him.
Click to expand...

intel guy was only reading from a sheet he does NOT know the answer to the query.

OP is jsut as qualified to give the answer as the intel guy (as he now has the same PDF the intel guy got the info from)
 
Si105 said:
Ironic... :rolleyes:
Click to expand...

I don't claim to be perfect but at least my post contained full words.

I just don't like the use of text speech on the internet, it's not like a lot of effort is involved in typing words out fully.

I didn't mean to offend by saying it, merely pointing out that people would be more willing to speak to you on a professional level if you spoke to them that way......not that an intel customer support person reading from a sheet would, but my point still stands.

(Also perhaps you could point out what makes my post ironic, i don't mean that as if to say i think im right, i honestly want to know.)
 
Says clearly in the spec sheet that 1.52 is safe and you can bet it will have been tested at even higher voltages. Also says in noted that each cpu has its own valid max voltage so looks like you cant run too many volts through it.
 
Intel do usually play it safe for voltages... but I have it from some very experienced people that I trust that they've seen premature failure with sandybridge with voltages of around 1.4 upwards. I can't say I'm much of a fan of sandybridge.
 
Me too I almost went in for a 2500k but I am skipping now as most of them seem to be limited to 4 - 4.5 ghz 24/7 with safe sub 1.4 voltage ? not to mention all the BSOD and issue reports with the p67 boards.

I am gpu limited still anyway, i'll upgrade if battlefield 3 requires me to though.
 
Last edited:
Hi guys a 3 points:
1. Intel tech support simply read that off a sheet. They don't even know what it means. I say this having spoken to them via the same chat service recently.
2. I spoke to a technician on intel chat a few weeks ago and said: There is no data in the specification regarding max voltages...
To be told that "there is no data available on this". My reply was that there was no way intel engineers had no idea of max safe voltages... Their response was: "Intel will not release this data as it allows overclocking..."
Don't know if I believe what "Dago" was saying having had first hand experience talking to these reps.
3. The data sheet doesn't tell you the max safe voltages. It just shows the steppings of the new SVID system replacing VID...
If you look the minimum voltage is ludicrously low... It looks to me like they simply went through the steppings until they got to 1.52v... There is no indication that this is a safe voltage...
It may also exist to allow higher binned processors to be released maybe "extereme editions"... Which require the higher vcore...

Finally common sense should tell you that if 45nm architecture can't handle 1.52v long term then 32nm sure as hell can't
 
As said by a few others - why go for the maxxx?

I'm happy enough going for the best speed/watt if you like. If that means a small bump off stock volts for 25%, so be it. As I said before, an increase in voltages leads to a surprisingly large increase in power consumption.

"This is an enthusiast forum" yeah yeah :p
 
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