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lynnfield vtt > 1.21 "fairly safe"

Discussion in 'CPUs' started by Raves, 14 Apr 2010.

  1. Raves


    Joined: 2 Jul 2005

    Posts: 343

    Location: Canberra

    Intel used to give 1.35V as safe on vtt, then with lynnfield 1.21V became max.

    But I have been following discussions over at the G.Skill forums, and their lead tech advisor routinely advises people to up their vtt (on lynnfield systems) well past 1.21, and in this case:


    he recommends try 1.5V. I had to make an account to ask him if he thought if this was safe and he replied:

    "It is fairly safe, it is simply necessary for "overclocking". Intel considers anything above DDR3-1333 overclocking, so that keep that in mind with all their voltage limitations. Of course aftermarket hardware is designed to take the extra voltage, so we suggest what we consider normal. "

    So is the 1.21V max by intel 'hogwash'? Thoughts?
  2. Lleot


    Joined: 19 Dec 2009

    Posts: 110

    I managed to get 4.1Ghz at 1.25v VTT so I don't think it's necessary for 1.5v VTT. Furthermore Intel created the chips and know what stuff they can take. For example no one would say aftermarket hardware means you should put your core voltage to 1.7v. Unless you are ready to lose the chip I would say not to regularly exceed Intel's spec because that's what its there for.
  3. gurusan


    Joined: 2 Sep 2006

    Posts: 13,489

    Location: Portland, OR

    I agree that it seems most lynnfield chips need ~1.2ish for 4GHz and when clocking higher even more is required.

    In fact it seems vtt is more of a factor on overclocking than vcore....however I think that recommending 1.5vtt is extremely foolish.