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[Official] The Sandy Stable Club **Guides, Voltages, Temps & BIOS Templates** Inc SPREADSHEET - Page 11

post #101 of 10368
3/20/11 at 9:08am
Quote:
Originally Posted by sockpirate View Post
That is not the maximum voltage available to the cpu, you can toss upwards of 1.6 at the chips.

Available to the CPU ! = Available to you

The CPU has a set range of voltages, at which 0.6 to 1.525... But 0.6 and 1.525 lie outside the maximum specified ranges of operation for the CPU. This means that the maximum safe is much lower than 1.525.

It has nothing to do with how much YOU can apply, but rather the specified ranges for the CPU. In which, 1.525 and 0.6 aren't within the operational field for the CPU.
Edited by LethalRise750 - 3/20/11 at 9:10am
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post #102 of 10368
3/20/11 at 9:10am
  • Penryn
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Quote:
Originally Posted by KBcobra View Post
The max safe voltage is 1.52v on the spec sheet for sandy bridge. Personally my self I wouldn't go more than 1.47 for 24/7 since I run water. A 45nm Core 2 Quad has a safe voltage of 1.38v according to it's spec sheet which we know is true from experience. Intel knows best about their chips.
This. It's right in the data sheet. So whoever came up with the 1.38 deal is spreading the false rumors here. Also, my mobo has an alarm that goes off when I am over "safe voltage" and it shows a warning on the post screen as I learned when it "auto" set to 1.8. All my runs up to 1.48 never produced this warning. Also, At 1.8v my cpu posted at 92C... under water... lucky I was able to get into bios and change it quickly.

As for that link munaim, I have to find it again. It was in a few reviews I read but that one touched on it the most.



Quote:
Each processor is programmed with a maximum valid voltage identification value (VID) that is set at
manufacturing and cannot be altered. Individual maximum VID values are calibrated during manufacturing
such that two processors at the same frequency may have different settings within the VID range. Note
that this differs from the VID employed by the processor during a power management event (Adaptive
Thermal Monitor, Enhanced Intel SpeedStep Technology, or Low Power States).

Edited by Penryn - 3/20/11 at 9:17am
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post #103 of 10368
3/20/11 at 9:11am
Quote:
Originally Posted by Penryn View Post
This. It's right in the data sheet. So whoever came up with the 1.38 deal is spreading the false rumors here. Also, my mobo has an alarm that goes off when I am over "safe voltage" and it shows a warning on the post screen as I learned when it "auto" set to 1.8. All my runs up to 1.48 never produced this warning. Also, At 1.8v my cpu posted at 92C... under water... lucky I was able to get into bios and change it quickly.

As for that link munaim, I have to find it again. It was in a few reviews I read but that one touched on it the most.

Read further into the Datasheet. It specifies that the ranges they use aren't within the field of normal operation. This means that those voltages aren't intended to be ran for extended periods of time.
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post #104 of 10368
3/20/11 at 9:19am
Quote:
Originally Posted by LethalRise750 View Post
No, that's the maximum voltage available to the CPU.. not the Maximum Safe. There's a good 50 page thread of about 20 other people stating the same thing.

http://www.overclock.net/intel-cpus/...l#post11985910
No ,that's not maximum voltage available
advanced/monitor menu/CPU voltage/ignore=max safe
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post #105 of 10368
3/20/11 at 9:22am
The maximum safe given by Intel is 1.38v. I know it's in the very nature of OCN to push for better performance, but NO-ONE should be giving out false advice. Intel have said 1.38v and THAT is what you SHOULD be telling people is the safe limit.

Anyone saying "oh 1.41v is fine" is spreading false information.

Who says we have to stick to that limit? No-one, this is OCN, but if someone is conscientious about their chip (I.E. Doesn't have bucket loads of cash for tri-sli GTX580's and new CPU's) we should give them the official safe limit. Not mislead them saying 1.52v is fine because 3 months down the road when they come here on the forums lamenting the loss of a CPU who will take the blame? No-one.

Let's be fair!
Edited by Viridian - 3/20/11 at 9:24am
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post #106 of 10368
3/20/11 at 9:22am
  • Penryn
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Quote:
Originally Posted by LethalRise750 View Post
Read further into the Datasheet. It specifies that the ranges they use aren't within the field of normal operation. This means that those voltages aren't intended to be ran for extended periods of time.
So basically the info my mobo has on the safe voltage of my chip is wrong... I better go switch my vcore since I am at 1.392... Oh wait. My temps are good... I even ram P95 for hours at 1.48... Hmmm.

I should go test to see which voltage that "CPU over volt limit" warning kicks in on my mobo...

Also the source that came up with 1.38 was Overclockers UK... before the chips released. We still don't even know where they got that number. Obviously you value their opinions over our experience.
Edited by Penryn - 3/20/11 at 9:25am
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post #107 of 10368
3/20/11 at 9:24am
Quote:
Originally Posted by Penryn View Post
This. It's right in the data sheet. So whoever came up with the 1.38 deal is spreading the false rumors here. Also, my mobo has an alarm that goes off when I am over "safe voltage" and it shows a warning on the post screen as I learned when it "auto" set to 1.8. All my runs up to 1.48 never produced this warning. Also, At 1.8v my cpu posted at 92C... under water... lucky I was able to get into bios and change it quickly.

As for that link munaim, I have to find it again. It was in a few reviews I read but that one touched on it the most.

Quote:
Each processor is programmed with a maximum valid voltage identification value (VID) that is set at
manufacturing and cannot be altered. Individual maximum VID values are calibrated during manufacturing
such that two processors at the same frequency may have different settings within the VID range. Note
that this differs from the VID employed by the processor during a power management event (Adaptive
Thermal Monitor, Enhanced Intel SpeedStep Technology, or Low Power States).
Thank you. That quote above me proves me right.

Here you go, the entire platform specification design guide.
http://www.mediafire.com/?jlk6asktabqcyso
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post #108 of 10368
3/20/11 at 9:29am
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Quote:
Originally Posted by Viridian View Post
Oh, I guess the UK's biggest Overclocking website and retailer is spreading false rumours?
Apparently so .. 1.388v is max voltage for Core 2 family and part of the nehalem family. I see no 1.388 on that spec sheet from Intel. Intel been right with their max spec sheet. Look at the Core 2 Quad which says 1.388v. I DARE YOU to pump 1.52 volts into a Core 2 Quad. Whats going to happen within a month or so is that quad will longer hold that overclock or worse. Most of people who run at 1.52v on Sandy Bridge are still okay since we have heard of no one degrading.
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post #109 of 10368
3/20/11 at 9:29am
  • Penryn
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Also, An ASUS technical engineer recommends voltages over 1.4 for certain overclocks. So we have Overclockers UK saying "don't go over 1.38" and we have ASUS saying "pump that voltage up gaiz".

Really depends which source you want to believe. I personally am going with the data sheet and my mobo, which both give max at 1.52v.

Asus quote:

Quote:
K series overclocking and voltage range recommendations

Quick Note regarding Voltage Scaling – Internal binning of both D1 and D2 parts we discovered consistent voltage scaling patterns.
1.For K series parts, the stock voltage supplied will allow for consistent overclocking generally up to a multiplier of 43x. There is potential for the multi to be raised to 44x depending on the load induced. This default voltage range be approx 1.240 to 1.260 under load.
2.Increased range between 44 to 47x multipliers will generally require a voltage range between 1.30 to 1.375V with an LLC recommended setting of high to ultra high.
3.Increasing the range between 48 to 50x multiplier will generally require a voltage range between 1.40 to 1.500 with a LLC recommended setting of ultra high.
4.Increased range between 50 to 52 (52 generally considered peak max multiplier except for rare 54x parts) will generally require a CPU voltage range between 1.515 to 1.535V with LLC at Ultra High and potential fine adjustments to the CPU skew range.

Overall a key item to note is the best voltage to oc scaling range potential for the turbo multiplier is 1.400 to 1.425 vcore. Using this voltage range with an LLC recommendation of ultra high will generally provide the best scaling potential with proper load temperatures*. We have generally found exceeding this voltage will not provide additional scaling or will increase load temperatures to a high level with synthetic load applications ( like Prime, Linx, OCCT ). Should you use more realistic loading testing (our recommendation is a combination of AIDA64 stress test, PC Mark Vantage) then temperatures under will be considerably under the max TDP rating.

*cooling recommendation and test performed with CoolerMaster Hyper 212+ with Single Fan, this is the minimum recommendation for multis above 46x. For 50+ multis we recommend a dual fan configuration with this cooler or improved cooling.
K series overclocking benefits from non CPU Voltage based adjustments ( UEFI values for power management , Cstates, PCH etc )
Also, the person who stated 1.38 as safe voltage later made this reply in the same thread:

Quote:
Yes as noted in my guide. Ideally i would not recommend anything in excess of 1.425 for 24/7 operation while the overall temperature may still allow for additional voltage and even additional frequnecy scaling i do not think it is worth it.

Edited by Penryn - 3/20/11 at 9:34am
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post #110 of 10368
3/20/11 at 9:33am
Quote:
Originally Posted by Penryn View Post
So basically the info my mobo has on the safe voltage of my chip is wrong... I better go switch my vcore since I am at 1.392... Oh wait. My temps are good... I even ram P95 for hours at 1.48... Hmmm.

I should go test to see which voltage that "CPU over volt limit" warning kicks in on my mobo...

Also the source that came up with 1.38 was Overclockers UK... before the chips released. We still don't even know where they got that number. Obviously you value their opinions over our experience.
Yep, Bit-tech and a host of over websites are lying too.

Why won't you listen to any of the official sources? It's not about your safe temperature it's about the voltages. The point is you could be at 50C underload 24/7 and STILL kill your chip with voltages. What part of that is hard to swallow?

And Intel have had these chips longer than you, OverclockersUK have had these chips longer than you (please check their forums wherein Gibbo has had an engineering sample and pre-releases for a few months now) Places like Bit-Tech and HardOCP have had the chips longer than you and funnily enough they all recommend nothing higher than 1.38v. So, yeah, sorry if I take official sources as more reliable than some guy on the internet.

Quote:
Originally Posted by sockpirate View Post
WOW....Just wow.....step away from the keyboard before you give yourself an ulcer.

We have all tested our own chips for months man...As soon as one of us posts something about our chips burning up or noticing severe degradation everything you posted is moot! Until then !
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