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~~~~~IMPORTANT SANDYBRIDGE OC INFO: Voltages & OC Guide!!~~~~~

Discussion in 'Overclocking & Cooling' started by Gibbo, Jan 10, 2011.

  1. Gibbo


    Joined: Oct 17, 2002

    Posts: 31,027

    Location: OcUK HQ

    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!

    These are just guidelines we recommend you follow, if you want to push more voltage through your CPU's then just be aware they could die on you. Your warranty is un-affected and we will honor any CPU's that die, we just won't ask questions as to how you killed them. ;)

    Not all CPU's are as fragile as others, we have experimented upto 1.50v Vcore and 1.70v memory and had zero issues with reliability, so it seems some of fine when pushing hard. :)
  2. MooMoo444


    Joined: Jul 4, 2008

    Posts: 25,490

    Location: (''\(';.;')/'')

    Wonder why baseclock changed so much for this series :eek:
  3. Gibbo


    Joined: Oct 17, 2002

    Posts: 31,027

    Location: OcUK HQ

    Possibly the onboard graphics?
  4. Gti


    Joined: Aug 16, 2009

    Posts: 267

    Can you give us any rough numbers on the dead CPUs?
  5. delpy8


    Joined: Jan 7, 2010

    Posts: 4,807

    Location: Up NORTH

    Say for eg I use the asus overclocking feature that comes with the p67 deluxe
    Will it set the Blck to more than a 100 automatically With turboV

    Just wondering
  6. alex24


    Joined: Jan 1, 2008

    Posts: 10,704

    Location: Chelmsford, UK

    Interesting and useful information, thanks for sharing this with us Gibbo.
  7. woppy101


    Joined: Oct 14, 2007

    Posts: 2,942

    Location: newcastle

    hope its ok i have shared and linked this on other forums as well just to pass the word
  8. Treznor


    Joined: Aug 22, 2005

    Posts: 89

    Good info, hopefully I wont have any problems when mine arrives tomorrow
  9. tommytinkle

    Wise Guy

    Joined: Feb 20, 2003

    Posts: 1,036

    Location: cornwall

  10. bulldog147


    Joined: Mar 22, 2009

    Posts: 5,158