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Folding Update - Multi GPU Support (New Core 1.07)

Discussion in 'Folding@Home - Join Team Guru3D !' started by Julepalme, Jul 2, 2008.

  1. Crossfire

    Crossfire Ancient Guru

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    Are running the SMP Client also ?
     
  2. MoosePower

    MoosePower Master Guru

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    Nope, I'm holding off on installing that till my computer is fully setup.
     
  3. morbias

    morbias Don TazeMeBro Staff Member

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    Just to report, I had to plug in a second monitor to my second card to get it running, otherwise it would just sit folding the test protein. And this is on XP, is this normal as in the OP it says you only need to do this for Vista?

    Fahmon is currently reading ~9000ppd :) if only I could leave my machine on all day
     
  4. Julepalme

    Julepalme Master Guru

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    I've heard it was a vista 64bit issues.. may also be an issue for other people..

    i got my single monitor hooked up with its 2nd input (vga) on my other card to make it work. otherwise i'd get loads of errors on it.

    also you may need to extend a desktop too it aswell for it to be recognized
     

  5. sardine

    sardine Active Member

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    On my jolly Holls for a week,

    shut down 2 of 3 pc's

    happy catching up PPD :D
     
  6. Crossfire

    Crossfire Ancient Guru

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    :(


    You had better bring a treat for all of us when you come back! :)
     
  7. deurbel

    deurbel Active Member

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    hm they need to fix a workaround, so that i don't have to plug in 3 monitors, i can run it indeed @ 3 cards a very nice start
     
  8. jimbobjames

    jimbobjames Active Member

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    What kind of speeds are you getting from each card ? I'm running two identical cards and one is getting around 1500 ppd less than the other .....

    I tried setting affinity's so they have a seperate CPU feeding them - no difference.

    Still getting tons more points but a little odd to see such a difference between two cards....

    They are running different BIOS versions so maybe that is the difference....
     
  9. Gaboou

    Gaboou Master Guru

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    Have you overclocked them? When SLI is disabled (which obviously has to be the case if multiple GPU Clients are supposed to work) then each and every card has to be OCed separately... :)
     
  10. Ryle

    Ryle New Member

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    Hello, i have set this up and everything seems to be running perfect. fahmon reporting 4986PPD per card and it gets/finishes WUs fine, but for somereason its not actually counting towards my score. still only getting ~5k, seems like all of the WUs are getting lost.

    copied this tutorial to the T and on my side everything seems to be running perfect, its just not adding up on stanfords servers.

    anyone else experiencing this problem?
     
    Last edited: Jul 7, 2008

  11. jimbobjames

    jimbobjames Active Member

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    Yes but both cards are reporting the same clocks in GPU-Z - also I believe if you use Ntune to overclock like it do then there is no way to clock each card seperately - you can however adjust manual fan speeds independently.

    Only wierd thing is that one card is reported as having 112 unfied shaders and the other 96 - whats wierder is that it if I switch them around GPU-Z reports whichever card is in the top PCI-E slot to have 112 shaders.......
     
  12. jimbobjames

    jimbobjames Active Member

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    Did you edit the client.cfg of the second client and give it a seperate machine ID ?

    I don't think that is mentioned in this thread but it is on the foldingforums - might be worth a try
     
  13. Ryle

    Ryle New Member

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    Thanks for the reply. both the GPU clients said nomachineid=2. so i changed gpu2 to nomachineid=3

    im assuming stanford set the default to 2 since the CPU is 1, this correct?
     
  14. BlackZero

    BlackZero Ancient Guru

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    Great finaly putting sli/ dual gpu to use, hitting ~11,500 ppd at gpu stock clocks.
     
  15. Gaboou

    Gaboou Master Guru

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    Hmm... really strange indeed... What does it show when SLI is enabled?
    You can always try RivaTuner- there you can set them independently. And while you're at it check your Unified Shader number using it too, GPU-Z is still pretty beta...

    BTW: do you have to change the position of the SLI-Switch Kit on your Abit AN8-SLI every time you turn SLI on and off? Hopefully not...
     

  16. deurbel

    deurbel Active Member

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    Just stock speeds, im getting about 4400 per card, but as i said i have to plug in 2 more monitors wich i dont have.
    I can switch 1 monitor and see it running on each card.
    the other 2 cards are running that test protein :(
    i dont get it, if there is a work around pls post it lol

    or maybe wait for an update
     
  17. deurbel

    deurbel Active Member

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    I noticed something weird, when i leave the settings in the NV CTRL panel @ default, like 3 frames ahead rendering and vsync off, i get about 1800 iter/sec ...

    But with 0 frames ahead and vsync on i get about 2430 iter/sec ...

    Anyone else noticed that? is it folding faster this way?
     
  18. Julepalme

    Julepalme Master Guru

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    Using the viewer to see iter/sec is generally a very bad way to assume performance for the GPU2 client..


    basically the viewer takes up a lot of the drawing power of your card.. and then it reports much lower than it actually is.. sure you can see a general difference between cards.. but if your'e like me with a lil lag you'll see it go from 50k iter/sec when ya start it down to 2000-4000 when it starts rendering... its much better to leave the viewer off and use fahmon to monitor PPD or just generally look at frametimes

    And also i dont think the settings really have any major impact on the folding.. just how much performance the viewer eats while on.. don't fold with it on :)
     
  19. Gaboou

    Gaboou Master Guru

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    Julepalme, you have written only a few posts so far but you've been a great help already, to me especially by bringing up that you have to plug a monitor into the second (third and so on) graphics card in order to be able to fold on it/them (BTW the display doesn't even have to be plugged into the power socket). :smile:

    For the next month or so I won't be folding due to my (not so well deserved but anyway) vacation. :O
     
  20. Crossfire

    Crossfire Ancient Guru

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    You can send your PC to me and I will let it fold while you are AFK. :p


    Have a good vacation!
     

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