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sandybridge take note  

post #1 of 127
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beware those with sandybridge linked is a thread from overclockers uk

http://forums.overclockers.co.uk/showthread.php?t=18227652

Hi there


Right guys myself and our technical guys have spent the entire weekend and this morning in discussions with Intel regarding the alarming amount of reports of Sandybridge CPU's dying and have been conducting our own testing as have Intel to find out what is a definite no no.


Sandybridge maximum safe voltages

Core Voltage - Not recommended too exceed 1.38v, doing so could kill the CPU, we therefor recommend a range of 1.325-1.350v if overclocking.
Memory Voltage - Intel recommend 1.50v plus/minus 5% which means upto 1.58v is the safe recommended limit. In our testing we have found 1.65v has caused no issues.
BCLK Base Clock - This is strictly a NO, anyone using base clock overclocking could/will cause damange to CPU/Mainboard. (Set manually to 100)
PLL Voltage - Do not exceed 1.9v!!



Processor - Basically we recommend customers not to exceed 1.35v to play it safe, all our bundles are set at 1.3250v or lower, any competitors offering bundles above 4.6GHz you should be enquiring as to what voltage they are using as we believe anything over 1.38v will limit CPU lifespan and anything over 1.42v will likely kill the CPU or severely limit its lifespan.

Memory - Intel recommend 1.50v plus/minus 5% which means 1.60v is the ideal safe maximum, but we have found in our testing all 1.65v memory is fine. We have also found most new 1.65v like Corsair XMS3 will run at its rated timings with just 1.50-1.55v which is well within Intel specifications. So people upgrading to Sandybridge you can still use your old DDR3, but we do recommend you run it at 1.60v or less. We are shipping most of our bundles which feature Corsair XMS at 1.50v-1.55v at rated timings. We've also discussed with Asus and MSI regarding voltages for memory and they also confirm in their testing 1.65v caused no issues with reliability.

Base Clock - To put it simple if you value the life of your components, do not overclock using base clock!

PLL Voltage - Again do not exceed 1.9v!
Edited by woppy101 - 1/10/11 at 4:55am
post #2 of 127
yeh im following that thread as well. The guy who said its 2500K was dead said later it works at stock speeds.
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post #3 of 127
Thanks for the info. I'll be keeping an eye on this.
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post #4 of 127
The notion that Intel has only recently been testing the voltage limits of Sandy Bridge is ridiculous to me. Still interesting nonetheless.
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post #5 of 127
Thanks
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post #6 of 127
Noted.

So... If I have tentatively selected RAM that is rated for 1.65, is that too high of a voltage?

Do I need to look for RAM that is rated at around 1.5?
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post #7 of 127
Why does this not surprise me.
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post #8 of 127
inb4 1366 brigade say i told you so

LOL
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post #9 of 127
ive been saying for days that if i wont take my 45nm processor over 1.36, im definitely not taking a 32nm over it.

i dont see how people thought that half finished documentation meant that a SB processor could run at 65nm Q6600 volts...
    
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post #10 of 127
I already posted that link in another thread earlier but to add to it Gibbo also said this:
Quote:
Hi there

I've spoke to Intel this morning and got the following answers from them:-

1. Anything over 1.40v on air is risky, upto 1.50v on water should be OK but risky.
2. Anything over 1.50v on memory is not recommended but should not kill a CPU.
3. Clocking on BCLK is highly un-recommended due to onboard graphics.

So the biggest factory they say is vcore, pushing above 1.40v is a risk, therefor I'd say don't go beyond 1.35v. BCLK clocking is a no no for sure.

I've asked for documents regarding 1.50v as motherboards manufacturers seem to think 1.65v is the safe limit, though Intel are saying 1.50v is more advisable.

I am going to update all our CPU descriptions with this information.

Anyone with 1.6-1.7v memory should run the memory at 1.50v as in theory it will run fine at those voltage as all memory manufacturers are now on new IC's.

That derails all that 1.52v is safe nonsense then, as predicted. You guys also MUST remember that voltage tolerance with your chip DECREASES as you overclock further.
Edited by GameBoy - 1/10/11 at 8:13am
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