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Does hyper-threading have ANY performance impact on games?

Discussion in 'General Hardware' started by Monkey_Business, May 16, 2010.

  1. Does Intel hyper-threading technology have ANY performance impact on games? What is HT best used for? Would a hyper threaded i7 run games any faster than a non-HT i5?
     
  2. Mussels

    Mussels Moderprator Staff Member

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    Yes.
    Multi threaded apps.
    Yes, assuming clock speeds are the same and the game can use more threads.


    A quick google of hyperthreading could have told you all this.
     
  3. Most modern games are multi-threaded for Two CPU cores. With the exception of a very few titles like GTA4, World in Conflict, and race driver GRID, which are fully multi-threaded through Four CPU cores.

    I would imagine that in the not too distant future, we'll be seeing many more games fully using quad cores.
     
  4. FordGT90Concept

    FordGT90Concept "I go fast!1!11!1!"

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    No, no games (I know of) use more than four threads (ehm, they have no more than 4 heavy threads, or threads heavy enough to burden more than 4 logical cores). Until quad-cores become the norm, octo-core won't be of much use in gaming.
     
    Crunching for Team TPU
  5. travva

    travva New Member

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    monkey business: why you always ask a random question and when someone replies you basically answer your own question? kinda makes you look silly imo.
     
  6. Mussels

    Mussels Moderprator Staff Member

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    if you knew all that, why bother making the thread?
     
  7. overclocking101

    overclocking101

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    bfbc2 loads all 8 of my cores.
     
  8. erocker

    erocker Super Moderator Staff Member

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    Well, I don't have hyperthreading, but as you can see most games/applications spread the workload out. The more cores/threads the merrier.

    GRID
    [​IMG]


    Battlefield Bad Company 2
    [​IMG]


    Unreal Tournament III
    [​IMG]


    Left 4 Dead 2
    [​IMG]

    Specs:
    PII 965 4ghz
    DDR3 1400 6 6-6-18
    2750mhz Memory Controller/North Bridge
    2 x 5850's 925/1100
     
  9. FordGT90Concept

    FordGT90Concept "I go fast!1!11!1!"

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    Note how not one core took 100% load on any of those games (UT3 got close but only on alt+tab). In order to benefit from more cores, you have to max at least one core. The more you max (given that the game is designed to utilize more than four cores) the more likely greater than four cores would be beneficial.


    Process Monitor will tell you exactly how few cores the application can run on without taking a performance hit.
     
    Crunching for Team TPU
  10. Mussels

    Mussels Moderprator Staff Member

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    one thing to remember too, is that the thread you're running can jump around between cores seemingly at random.

    just because you see activity on all cores, doesnt mean you're getting any benifit (4 cores with an average of 40% aint any faster than 2 cores at 80%)
     
  11. FordGT90Concept

    FordGT90Concept "I go fast!1!11!1!"

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    It depends on the game. Some sets affinity on threads to specific cores, others don't.
     
    Crunching for Team TPU
  12. Hayder_Master

    Hayder_Master

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    yeah it's become boring he do many threads of google titles


    +1 for bc2, first came use all cores and threads
     

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