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4870x2 and DX11

Discussion in 'AMD / ATI' started by Locksmith, Feb 17, 2012.

  1. Locksmith

    Locksmith

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    noticed in heaven bench i can use dx11 with my 4870x2, was wondering how, looked around the board not seen anything about this, didnt want to ask again. but i do wonder
     
  2. Capitan Harlock

    Capitan Harlock

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    i think its a bug of heaven bench, its impossible for a hd 4000 run dx 11
     
  3. ChristTheGreat

    ChristTheGreat

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    Your card cannot run Directx11 it's hardware limited. If you can select DX11, it's will work DX10 only.. Software bug..
     
    Crunching for Team TPU
  4. user21

    user21 New Member

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    seriously? can you post images?
     
  5. Locksmith

    Locksmith

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    ok thanks for that lads, i was wondering, not anymore :)
     
  6. Locksmith

    Locksmith

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    user21 u want a dump of it set on dx11 ?
    np
     
  7. user21

    user21 New Member

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    never mind it cant execute dx11 games :p
     
  8. Locksmith

    Locksmith

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    is a shame :respect: i love the card
     
  9. javaking

    javaking

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    upgrade to 6870X2 on newegg
     
  10. Locksmith

    Locksmith

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    two of these with no egg please

    6950 OC Twin FrozR II 2048MB GDDR5
     
  11. Locksmith

    Locksmith

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    no eggs here bud , im in UK
     
  12. claylomax

    claylomax

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    Some DX11 games/applications can be run on DX10.1 hardware, but of course you won't get any tessallation; for example you cannot apply AA in Alien vs Predator if you run it on DX9, you need DX11 for that; however if you have a DX10.1 card you can apply AA by running DX11.
     
    Locksmith says thanks.
  13. GotNoRice

    GotNoRice New Member

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    Wow, there sure are a lot of people here who really don't seem to know what they are talking about.

    The assumption that people seem to be making is that because the 4870x2 is DirectX10.1 hardware, that means it won't be able to run DirectX11 games and benchmarks. That is simply incorrect and not the case at all.

    The 4870x2 should have little if any issues running any DirectX11 game. This applies to all DirectX10 and 10.1 hardware.

    DirectX11 is a strict superset of DirectX10.1, which itself is a superset of DirectX10. Compatibility is as simple as shedding the small subset of feature that are not present in DirectX10/10.1.

    When a DirectX11 program is run, it will first make a quick query to determine your card's "feature level". There are separate feature levels for DirectX11, DirectX10.1, and DirectX10 hardware. Once it has made that determination, the game will continue to run, in DirectX11, making use of all the features in the highest available feature level.

    There is even a separate feature level just for 10.1 hardware, instead of grouping it in with other DirectX10 hardware. That means DX11 games using the DX10.1 feature level will still be taking advantage of the advances DirectX10.1 made over 10 that were not taken advantage of in the past due to Nvidia's lack of 10.1 adoption, advances which ultimately became a part of DirectX11. It's also important to understand that a game running in DirectX11 using the 10.1 feature level is NOT the same as the game simply running in DirectX10.1, as there are numerous improvements in the DirectX11 API itself that are not dependent on the underlying hardware.

    http://msdn.microsoft.com/en-us/library/windows/desktop/ff476872(v=vs.85).aspx

    So while your card will not have all the benefits of a card using the DirectX11 feature level, running a DirectX11 game on 10.1 hardware is really not a bad place to be. The main noticeable feature you are going to miss out on is Tessellation, and when I say "noticeable", keep in mind that everything is relative...

    Tesselation enabled (DirectX11)
    [​IMG]

    Tesselation disabled (DirectX10.1)
    [​IMG]

    So there are differences, but it certainly doesn't involve not being able to play DirectX11 games. I'm a proud current user of 2x 4870x2 in Quad Crossfire and it has held up with age so well that my Quad-GPU config is even competitive with a 7970 in certain situations. Almost all of the games I play are DirectX11, and they all run perfectly.
     
    Last edited: Feb 18, 2012
  14. driver66

    driver66 New Member

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    You are also keeping up with the entire East Coast on power usage :toast:
     
  15. mudkip

    mudkip

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    His graphic cards are hottter than your mom :laugh:
     
    driver66 and AlienIsGOD say thanks.
  16. claylomax

    claylomax

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    It's just what I said. :D
     
  17. Capitan Harlock

    Capitan Harlock

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    its hardware limitation not driver ,run dx11 on hd 4000 is impossible,its not only tesselation,if you wanna have a dual gpu go for the 6870x2 made from powercolor ,you dont have only dx11 but low power consumption and much more features
     
  18. user21

    user21 New Member

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    +1
     
  19. Locksmith

    Locksmith

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    all interesting posts chaps even the one about that guys mum... thanks
     
  20. Dent1

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    Locksmith, you are not missing out. There are very few true DX11 games, there isnt that many true DX10.1 games either. At the end of the day running a DX11 game in DX10 mode will still look great, you won't even notice the difference. Plus you benefit from increased frame rate. I would rather run a game in DX10.1 mode @ 60 FPS than DX11 mode at 40 FPS.
     
    Last edited: Feb 18, 2012
  21. user21

    user21 New Member

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    Please post a list of successful games that ran on dx10 cards through dx11 executable.
     
  22. claylomax

    claylomax

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    I cannot tell the difference in real play; sometimes I think DX11 is just a gimmick. On the other hand have a look at games like Hard Reset, it's a DX9 game and looks great.
     
  23. Dent1

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  24. user21

    user21 New Member

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    you didnt get my point or it may be im getting you all wrong. You said a dx10 or dx10.1 card can actually run a dx11 game. BUT thats not possible you see a game comes with both dx9 or dx10 executable files and for dx11 there is a seperate exe file provided which wont let you play the game if you execute it with a dx10 card. it reverts back to windows
     
    Dent1 says thanks.
  25. Dent1

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    I know there is two executables. Like Crysis would have the hidden DX10 .exe in the folder.

    I didnt mean that DX10 could run DX11 games. I meant that most DX10 and DX11 games have DX9.0 support and it can look almost the same. Most people won't notice the visual quality difference so it isnt worth losing frame rate on small selection of games for effects you won't care about.
     

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