Does enabling hyperthreading in an OC i7 require extra voltage?

For example, I have my Core i7 2600K running @ 4.7 ghz stable at around 1.33v with hyperthreading off. If I enabled HT at times, would that require a voltage boost to be stable or should it be presumed to already be stable at the same vcore?
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More about does enabling hyperthreading require extra voltage
  1. That's something we can't tell you. You would have to try it on your machine and find out.
  2. As Leaps-from-Shadows said, the only way to find out is to test yourself.

    I "assume" it would considering it re-enables parts of the CPU, which in turn would drive power usage up a little bit.

    With hyperthreading, each core has double of some of it's resources, when those are enabled I "assume" they use a little more power.
  3. Who would buy a 2600K and disable hyperthreading? LOL

    Only you can tell us if it's stable with hyperthreading on at that voltage, how could we know, all cpu's are different???
  4. geekapproved said:
    Who would buy a 2600K and disable hyperthreading? LOL

    I debated whether to do that very thing for my initial Sandy Bridge purchase, before settling on the 2500K. Why? Higher stock clock speed, and 2MB extra L3 cache.
  5. If you look at the cpu charts, the 2500K actually scored slightly higher than 2600K, so the cache doesn't do much and who cares about a 100mhz speed advantage when your buying and unlocked cpu for overclocking?
  6. There are likely many instances where the extra 2MB of cache gives a boost but HyperThreading gives a penalty, canceling each other out. Those CPU charts likely didn't have listings for 2600K with HyperThreading disabled.

    And in any case, I've seen quite a few overclockers who disable the HyperThreading on their 2600K so they can get higher speeds and/or lower temps.
  7. Yes I know the reason to disable HT is for higher overclock and/or better stability, but you pay $100 more for HT and then disable it, makes no sense when you could reach the same clocks/stability with a 2500K.
  8. geekapproved said:
    Yes I know the reason to disable HT is for higher overclock and/or better stability, but you pay $100 more for HT and then disable it, makes no sense when you could reach the same clocks/stability with a 2500K.



    What I would be doing is using it with hyperthreading when I need it, but without it when I don't. Alternating at times so to speak. Most of the time I have no need for it, so yes I admit I probably jumped the gun a bit on getting the 2600K over the 2500K
  9. But what's the point of having to disable it to get higher overclock?

    Just for epeen status or do you really need to overclock your cpu that much? For what?
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