Build 982 Multiview + SLI

Discussion in 'Technical & Support' started by otta56, Jul 4, 2015.

  1. otta56

    otta56 Registered

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    For those of you using SLI'd Nvidia cards, build 982 requires new SLI compatibility bits.

    The one that works reasonably well from the drop-down menu of Nvidia Inspector is (LEGO, Batman 2, LEGO Pirates of the Caribbean,...)
    The actual bits are (0x02D04005). The rest of the settings can be left as per your preferred values if using Nvidia Inspector.

    Framerates are between 50-60 fps at Atlanta Motorsport Park with all settings on high including reflections using 20 Eve F3 cars @ 4xMSAA 7680x1440.

    The previous SLI compatibility bits that worked (F1 2000, Icarus) (0x02C00405) average between 29-41 fps with build 982.

    Regards.
     
  2. Spinelli

    Spinelli Banned

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    Can we have some single GPU comparisons to see if SLI is worth it in the first place let alone different comp bits? That would be much appreciated.
     
  3. dsuspense

    dsuspense Registered

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    Nvidia 353.06 drivers, nVidia GT 650M SLI, about 65-130 FPS with SLI, used Monaco as my test track since its the most taxing on my system...
    If I used single card I get 60-80 FPS.

    However on Atlanta and Silverstone, I am not getting any improvement with SLI, both hover around 50 FPS no matter whether I use single card or SLI configuration.

    Other tracks I am getting good FPS, like Sebring I am getting 75-120 FPS with SLI.

    Can't believe Atlanta and Silverstone are that taxing on the graphics cards.
    Very strange.
     
    Last edited by a moderator: Jul 4, 2015
  4. Richard Hessels

    Richard Hessels Member

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    Why would you use 4x MSAA on such a resolution, as you have difficulty running at least 60fps.
    Unless you have a g-sync monitors framerates lower than your monitors refreshrate make the game look much less fluid.
     
  5. Spinelli

    Spinelli Banned

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    I agree Richard. Otta, try dropping both reflection settings down to low, you probably won't even notice a difference. Maybe even shadow blur to fast.
     
  6. dsuspense

    dsuspense Registered

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    Thanks for this, Nvidia Inspector SLI compatibility bits (LEGO, Batman 2, LEGO Pirates of the Caribbean,...) worked for me!

    I used these SLI Compatability bits and now Atlanta runs at 75-100 FPS, Silverstone at 105-135 FPS!
    I am running without HDR, but WOW, that is how SLI is supposed to perform!

    Seems to be a compatability bits issue, like you discovered.
     
    Last edited by a moderator: Jul 7, 2015
  7. dsuspense

    dsuspense Registered

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    Some becnhmarks I did with the new build and these SLI bits provided:

    rF2 build 982, Nvidia 353.06 drivers, nVidia GeForce GT 650M SLI

    HDR: ON
    Car: Nissan GT-R
    SLI: ON
    SLI Compatability bits: 0x02D04005

    Atlanta: 70-95 FPS
    Silverstone: 80-115 FPS

    HDR: ON
    Car: Nissan GT-R
    SLI: OFF

    Atlanta: 30-50 FPS
    Silverstone: 46-67 FPS


    I overclock my GeForce GT 650M SLI cards using nvidiainspector (overclocking was done for both SLI ON and OFF):

    nvidiaInspector.exe -setGpuClock:0,2,980 -setMemoryClock:0,2,2300 -forcepstate:0,0
    nvidiaInspector.exe -setGpuClock:1,2,980 -setMemoryClock:1,2,2300 -forcepstate:1,0
    ||-forcepstate:0,5
    ||-forcepstate:1,5

    I go even higher with overclocking for AC and pCARs and it works fantastic!

    nvidiaInspector.exe -setGpuClock:0,2,1050 -setMemoryClock:0,2,2250 -forcepstate:0,0
    nvidiaInspector.exe -setGpuClock:1,2,1050 -setMemoryClock:1,2,2250 -forcepstate:1,0
    ||-forcepstate:0,5
    ||-forcepstate:1,5
     
  8. Spinelli

    Spinelli Banned

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    That looks very encouraging for SLI players, thanks for the test.
     
  9. Noel Hibbard

    Noel Hibbard Registered

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    What reflection settings are you running? It seems those are the two settings that have the biggest impact on SLI.
     
  10. MaD_King

    MaD_King Registered

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    +1, I think it's what SLI guys can expect (close to X2 in FPS). So it seems to be good !!
     
  11. Spinelli

    Spinelli Banned

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    +1
    I totally forgot about this...
     
  12. otta56

    otta56 Registered

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    Reflection Settings with SLI + Multiview

    Depending on your video cards, there is not much of an fps penalty between low or high reflection settings. I had exactly the same fps at Atlanta with reflection settings on high or low using 16 EVE F3 cars. There is more choppiness on some sections of the track when using a high polygon count vehicle like the AC427. In the case of this car, setting reflections to low raised the minimum framerate by 5 fps on the same portions of the track versus using the F3s. This resulted in less choppiness.
     
  13. Satangoss

    Satangoss Registered

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    What's the point to benchmark a single car in a track? Wheater condition? Time of day? Shadows? Shadow blur settings?

    Try at least 20 AI cars with all maxed and see your SLI stuttering everywhere.

    I get 200 FPS+ with or without SLI at a practice day and clear sky, in other hand it can go under 40 FPS under heavy scenarios as rain, reflections max/max and lots of AI cars.

    You have to stress your system to do some relevant benchmark.
     
  14. Spinelli

    Spinelli Banned

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    So are you confirming that the SLI scaling is good with both reflection settings at high/full?

    How I like to do it is a replay with many cars or - if doing a live gameplay benchmark - no AI but night time + rain + headlights on. The headlights probably don't make much difference but night and rain make a large difference.

    Night time + rain + headlights should be stressfull enough for most tests even without A.I.
     
    Last edited by a moderator: Jul 9, 2015
  15. dsuspense

    dsuspense Registered

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    Road and Env reflections Low.
    Shadows Med, Blurr Off.
     
  16. dsuspense

    dsuspense Registered

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    He asked for a comparison of Single vs SLI, not stress test, so that is what I did.
     
  17. otta56

    otta56 Registered

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    Yes.

    That being said SLI performance is very dependent on the compatibility bits. The current build seems to work best with 0x02D04005. The previous bits (0x2C00405) that gave 50+ fps with build 946 give only half the fps in build 982.
     
  18. Spinelli

    Spinelli Banned

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    That's great! I just received my 2nd 970 today. Will post my results in the coming days for everyone (not that they matter much to me personally as SLI scaling w/ RF2 has always been excellent w/ Nvidia 3D Vision in all circumstances [1 screen, 3 screens, multiview, HDR, any and all refection settings, etc.]).
     
  19. dsuspense

    dsuspense Registered

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    HDR: ON
    Car: Nissan GT-R
    SLI: ON
    SLI Compatability bits: 0x02D04005

    Portugal 2.0: 70-96 FPS

    HDR: OFF
    Car: Nissan GT-R
    SLI: ON
    SLI Compatability bits: 0x02D04005

    Portugal 2.0: 70-112 FPS
     
  20. Satangoss

    Satangoss Registered

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    I've just set the Vsync to "Smooth" forced on GPU. Zero stutters, fluid game and very low input lag. That was the only way I found out to make SLI usable on heavy scenarios.
     

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