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Graphics Dual x8 560Ti 1gb SLI won't run Ultra on BF3

Discussion in 'Hardware' started by feathers, 3 Apr 2012.

  1. Deders

    Deders Modder

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    It's a combination of overflowing vram and 8x PCIe. Now the vram is still overflowing, but it has twice as much PCIe of bandwidth to swap data to and fro when needed. Hence why it's smoother.
     
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  2. noizdaemon666

    noizdaemon666 I'm Od, Therefore I Pwn

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    Never thought of it like that. +rep for teaching me something new :D
     
  3. feathers

    feathers Minimodder

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    Which driver? Nvidia? Nah. Does anyone have any PCIe bandwidth data for x8 and how much BF3 would use in terms of bandwidth at x8?

    I always read that x8 would not impact performance, but then there was no BF3 ultra in those days. The SLI worked fine on all other games. Is it a BF3 bug? No. It is simply as others have stated, that ultra textures needs more than 1gb GDDR so the data is fetched from system and the data is not passed fast enough through x8 bottleneck. Now when u run BF3 on high, the data requirement drops as does mem usage, the data does not saturate the x8.
     
  4. The_Crapman

    The_Crapman Don't phone it's just for fun. Staff

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    I heard scan were saving themselves for 'that special motherboard'.
     
  5. noizdaemon666

    noizdaemon666 I'm Od, Therefore I Pwn

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    I thought they were permanently in the friend zone?
     
  6. TobletDanillio

    TobletDanillio Minimodder

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    I have read some where (don't know where sorry) but that 8x slots just don't cut newer games like BF3 thats why I'm guessing that your cards didn't work together.

    But you have learnt a lesson and that's all that matters now
     
  7. jizwizard

    jizwizard Modder

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    X8 x8 bandwidth is not harming my setup so I would say that is not the bottleneck. Yes it would perform slightly better on x16 x16. Were you trying to run ultra on 3d
     
  8. feathers

    feathers Minimodder

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    You're running gtx 570's so slight
    Bump in VRAM amongst other things.
     
  9. noizdaemon666

    noizdaemon666 I'm Od, Therefore I Pwn

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    Yeah the added vRAM on the 570s probably means that all the textures and whatnot fit in the vRAM without having to go to system RAM to swap things about. Hence none of the 8x bandwidth is being used for swapping.
     
  10. feathers

    feathers Minimodder

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    I think the difference although only small between 1gb and the extra the 570 has could be enough. I must remind everyone that other than BF3 on ultra, all other games worked perfectly on SLI with none of the massive frame drops (perhaps Hard Reset also) so I don't think there was an issue with one 560 not keeping up with the other. I always checked the GPU usage for both 560ti and on games that had correct SLI scaling the usage on both GPU was 97 - 98% for DX11 games. There were a few games like Shift 2 and Crysis 2 that initially (until they released a patch) didnt scale properly but that would show up clearly on afterburner on screen display.
     
  11. TobletDanillio

    TobletDanillio Minimodder

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    BF3 like having more than 1GB of vram thats why I got the 2GB vesion of my card to insure that I could play BF3 at the highest setting
     
  12. feathers

    feathers Minimodder

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    My 2gb gpu should arrive today!
     
  13. TobletDanillio

    TobletDanillio Minimodder

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    what you get?
     
  14. feathers

    feathers Minimodder

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    Something called GTX 680 or something from AMD. Not sure, I just chose one at random that had 2gb.
     
  15. TobletDanillio

    TobletDanillio Minimodder

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    I have to say i like the 680 over anything AMD can think of lol
    I wish I had one of them ;p
     
  16. feathers

    feathers Minimodder

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    I wish I had one too. Hasn't arrived yet.

    I have always preferred Nvidia because they always supported 3d glasses. I used to use Elsa Revelator shutter glasses with CRT monitor many years ago. I owned one ATI which I think was a 9800 or whatever it was. Bought it used with water and TEC fitted. It was a crap overclocker and the ATI control panel used to crash all the time. I know since then that ATI can be very good for overclocking but I still prefer Nvidia. A friend of mine running a business for printing complained his GPU kept crashing a few years ago. Turns out it was an ATI and I checked his then Vista OS and it showed the ATI control panel had crashed over 200 times! I advised him to get rid and buy an Nvidia 470. He never had issue since then.

    I have bought low end ATI and put in machines I built for people over the years and they ran fine though once the drivers were updated. I put a cheap ATI in my bro's PC 3 years ago and it overclocked well and gave quite an increase in FPS overclocked.

    I will stick with Nvidia though. ATI still arent sure if 3d vision will catch on. Meanwhile Nvidia have supported it long before their "3d vision" rebirth.
     
  17. Zehetmayr

    Zehetmayr Minimodder

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    I'm confused. You bought a GPU at random that had 2GB vram? A GTX 680 or something from AMD?
     
  18. feathers

    feathers Minimodder

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    Yeah...
     
  19. Zehetmayr

    Zehetmayr Minimodder

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    A GTX680 costs in the region of £400. Wouldn't personally spend that amount of money on a random purchase.
     
  20. TobletDanillio

    TobletDanillio Minimodder

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    as said before that ATI are good for cheap graphic card and Nvidia are better at high end
     

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