PhysX better on the CPU or GPU

Discussion in 'Videocards - NVIDIA GeForce Drivers Section' started by johnmambo, Jun 12, 2012.

  1. johnmambo

    johnmambo Master Guru

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    Quick question: Based on my rig, should i leave PhysX processing to the GPU or the CPU ? Mainly playing BF3.

    Thanks !!!:)
     
  2. Cyberdyne

    Cyberdyne Guest

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    If a game uses Physx, then it's best to use it on the GPU.
    BF3 does not use Physx, so it does not matter what you set it to.
     
  3. applejack

    applejack Master Guru

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    doesn't matter for BF3. only the following games use GPU PhysX:
    http://physxinfo.com/index.php?p=gam&f=gpu

    these games usually won't allow high physx on the CPU,
    but anyway your card is strong enough to handle GPU PhysX way better than pretty much any CPU, at least with current implementations.

    edit: kudos to Cyberdyne for posting faster :)
     
    Last edited: Jun 12, 2012
  4. Sinaster

    Sinaster Guest

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    GPU is much faster.Selecting cpu for doing Physx kills your fps greatly.
     

  5. sapo_joe

    sapo_joe Master Guru

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    This list is fairly incomplete. Most Unreal Engine 3 games use PhysX, and many more than displayed on it.
     
  6. ShadowDuke

    ShadowDuke Ancient Guru

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    GPU ofc!
     
  7. sapo_joe

    sapo_joe Master Guru

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    I leave it on auto, and it looks good... :)
     
  8. Matt151b

    Matt151b Guest

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    I was playing with batman AC and found forcing physx to gpu, instead of auto, to do better.
     
  9. sapo_joe

    sapo_joe Master Guru

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    Doesn't change FPS here, and my GPU gets hotter (almost 85ºC vs 70ºC max) when forcing it to be used. Well, there's an automatic setting just to decide that. I believe it looks at pre determined cpu configs and GPU/Vid mem usage, and decides which is going to be more efficient. My CPU is almost always on 45% usage even on new games, so, if it can balance things, it's better! :stewpid:
     
  10. Zogrim

    Zogrim Active Member

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    They use PhysX SDK engine, but do not support GPU acceleration or contain extra PhysX effects.
    PhysX is used in 340 games (it is fairly popular middleware), but only 19 can really take advantage of NVIDIA cards.
     
    Last edited: Jun 13, 2012

  11. sapo_joe

    sapo_joe Master Guru

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    Still, it looks great. AND it's another great reason to have nvidia hardware... :banana:
     
  12. Maccie72

    Maccie72 Guest

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    PhysX

    Just use automatic setting in nvidia control panel, no need to set it differently.
    will otherwise potentially crash BF3
     
  13. Spets

    Spets Guest

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    BF3 doesn't even use PhysX..
     
  14. mrmonsoon

    mrmonsoon Master Guru

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    While my asus 6950 cuda 2 is going back for repairs, I have my 275 GTX vard back in.

    I have a Intel I7 960 processor and currently 275 gtx, physX is set for cpu.

    In hellgate london, skyrim and rage, are you saying I would get much better frame rates with physX on my gpu???

    I don't know if my 275 is powerful enough(stock clock) to get away with that???
     
  15. cricket bones

    cricket bones Master Guru

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    Why don't you take a few minutes and try it out yourself? Easy to do, no?
     

  16. mrmonsoon

    mrmonsoon Master Guru

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    The change is easy, but telling any difference generally requires testing fps....

    Too lazy to go through that, I was asking if anyone had experience with the same hardware/games and what the results were.
     
  17. rl66

    rl66 Ancient Guru

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    even a low power GPU is still better than CPU for PhysX... (this is why so much people "recycle" old main GPU as a dedicated PhysX card)

    generaly your GPU will go hotter, but your eye will say "thx you" lol
     

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