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Case Mod - In Progress Passively air-cooled GTX570 SLI - April, 2013

Discussion in 'Project Logs' started by jippa, 25 Jan 2013.

  1. jippa

    jippa What's a Dremel?

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    Looking for SLI bridge signal speed, signal impedance, definition of the signals and pinout of the 26 pin connector information. Only:cooldude:. Any help would be appreciated!

    Best!

    jippa
     
  2. elAwesome

    elAwesome What's a Dremel?

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    Have you contacted ASUS for that?
    Maybe they like your project and decide to help you a little...
     
  3. nagyizom

    nagyizom Minimodder

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    Hey jippa! I'm glad to see you there!:clap:
     
  4. jippa

    jippa What's a Dremel?

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    Today, I did the testing with an "off-the-shelf" 90mms long SLI bridge. SLI enabled, no artifacts at all . :rock:

    [​IMG]

    Even more eager to find SLI bridge signal speed, signal impedance, definition of the signals and pinout of the 26 pin connector information.

    Best!

    jippa
     
  5. YEHBABY

    YEHBABY RIP Tel

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    Just saw this. I like how you've brought great idea to life.
     
  6. jippa

    jippa What's a Dremel?

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    Update!

    A finally got my SLI bridge ready. It is 400mms long. Testing is expected to happen the forthcoming weekend. Here is a picture of the bridge:

    [​IMG]

    Best!

    jippa
     
    Last edited: 10 Apr 2013
    siliconfanatic likes this.
  7. woody_294

    woody_294 Wizard Ninja :P

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    Wow! Hope this works, ofc you could put the cards back to back so the cards are closer together and the heatsinks are on the outside, you could probably reach with a standard bridge then, maybe 5" or so
     
  8. jippa

    jippa What's a Dremel?

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    A 140mms bridge was not long enough. I have not found a factory solution longer than that.
     
  9. elAwesome

    elAwesome What's a Dremel?

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    Hahaha this is just crazy :D
    I hope it works this time!
     
  10. Burnout21

    Burnout21 Mmmm biscuits

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    How the hell did I miss this!

    My favourite case of all time as well! Major props for true modding!
     
  11. siliconfanatic

    siliconfanatic Johny-come-Lately

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    Any news on the patient?
     
  12. AlienwareAndy

    AlienwareAndy What's a Dremel?

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    Hi Jippa.

    Some time last year I looked into PCIE ribbons. I read that high powered GPUs such as the 570 and so on needed an extra 12v. If you look at this picture you will see what I mean.

    [​IMG]

    After looking at your log I don't see those 12v lines fitted to your ribbons so I could hazard a guess and say that it could be that causing the interference?

    I can't be sure obviously because I never did get around to using them but I did read that due to the constraints of ribbon cable there could be drops in PCIE bandwidth without the extra 12v line.

    Something to look into any way and good luck with the project.
     
  13. jippa

    jippa What's a Dremel?

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    Just finished testing. It is a no-no. Even worse than with the previous version. I am close to crying a bit.

    This is what I have done to her:

    [​IMG]

    AlienwareAndy: Thanks for the suggestion. I have seen this picture of a riser with a molex earlier on. What I can tell you is that I am running SLI flawless with my risers and a 90mms long factory bridge.

    Best for now!

    jippa
     
    Last edited: 17 Apr 2013
  14. Pranja

    Pranja Blackwolf

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  15. jippa

    jippa What's a Dremel?

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    This one was already soldered from a very special flat ribbon cable, and it did not work out for me. I am pretty much stuck with flat cables.

    However, I am expecting Mr. Postman to bring me something...big. I'll keep you, guys, informed. :thumb:
     
  16. elAwesome

    elAwesome What's a Dremel?

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    Is there a special reason you are using SLI?
    You could sell those 570s and buy a single, more powerful GPU. That keeps you from your SLI connector dilemma... and not to forget, a singel GPU, e.g. a GTX670, is going to give off less heat than your two GTX570s, that might be worth considering in a passively cooled build!
     
  17. siliconfanatic

    siliconfanatic Johny-come-Lately

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    Hmm... About the only thing I can think of is repositioning the left card so that It's pcb is lying parallel to the back of the case. Same vertical orientation though. This would position the two sli ports much, much closer than they are now. This should allow you to use the standard bridge.

    And looking at her state; Trust me when I say that it can get much, much worse when trying to fix something. God, the last time a connector had a loose wire my rig looked like a war zone! :worried:
     
  18. Nexxo

    Nexxo * Prefab Sprout – The King of Rock 'n' Roll

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    For SCIENCE!!! :rock:
     
  19. N!ck

    N!ck ModMag.Net

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    Another thing to try - bumping up GPU voltage, maybe it will help by increasing SLI signal strength .
    ALS used that trick to get a stable system when he used a PCIe riser in his modding project.
     
  20. jippa

    jippa What's a Dremel?

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    elAwesome: The special reason for me using SLI is that I want to check if it's possible. :D

    siliconfanatic: When designing the setup, I even had dummy cardboard VGAs connected to each other with a flat piece of string to check possible positioning of the cards. Believe me, this present positioning of the cards is the only possible one in this particular PC case. These risers are 90mm in width, they are very hard to bend. As for the bridge, I have tried each and every possible setup with my 140mm bridge and there was no way I could connect to two cards with it. Neither side by side, nor twisted. You could do the side by side setup, however, with a 160mm long bridge. I have contacted NVIDIA, ASUS and WIESON Co. (and some further minor companies, too) for an extra long factory bridge, without any success.

    N!ck: I am up to something. Should this last effort of mine turn up to be a failure, I'll start to play with voltages. In one or two days, I hope to know the answer.

    Best!

    jippa
     

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