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Thread: Watercooling pump question

  1. #1
    Will YOU be ready when the zombies rise? x88x's Avatar
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    Default Watercooling pump question

    So, there's a very real possibility that I might be able to build something awesome for work, but in planning it and laying out the costs, I'm running into a bit of a problem.

    Problem: need stupid amounts of GPU power.
    Solution: EVGA 7-16x PCIe MBB + 7x EVGA GTX295 WC (yes, I know the MBB won't have 16x speeds if I fully populate it)

    New problem:
    I haven't decided on a case yet (can't do too modification, since it's for work), but the case will largely depend on what I want to put in it. For laying out the WC loop, I'm thinking probably 4-5 3x120mm rads and a nice Eheim pump. What I'm wondering is if the one pump would be good, or if I would be better off using multiple smaller pumps at various points in the loop for a better distribution of pressure. Also, has anyone seen something like this done before? One of my biggest concerns would be that I would have to daisy-chain all the GPUs together in one long string because of the close proximity, and that the last few would have pretty horrible temps as a result.

    Like I said, this is just a possibility, though it is definitely a possibility I'm just trying to work out some kinks in the idea before I try and sell it to my boss.

  2. #2
    One Eye, Sixteen Cores. Kayin's Avatar
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    Default Re: Watercooling pump question

    Run dual DDCs, though I can design you split loops for that as well, and that would let you run all of it off a TyphoonIII and a single D5...
    Project:Mithril, sponsored by Petra's Tech Shop and Sidewinder Computers-MOTM Nominee October '08




  3. #3
    Will YOU be ready when the zombies rise? x88x's Avatar
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    Default Re: Watercooling pump question

    I'm definitely not adverse to split loops but IDK if I would be able to break off the loop anywhere because of the close proximity of the cards. I know I can daisy-chain them with the 'SLI' WC connectors, but I'm pretty sure there won't be enough space to break off and have, say, 3 cards on one loop and 4 on the other. If I can't split it, would you recommend have the two DDCs both at the same point or at two different points? If at the same point, in series or parallel? I would be using 3/8" ID tubing, unless there's a compelling reason for me to go up in this specific case.

  4. #4
    iShot the Sheriff jdbnsn's Avatar
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    Default Re: Watercooling pump question

    You don't want to run water pumps in series, you can run them in parallel or in discrete loops. Just not in series
    "At the midpoint on the journey of life, I found myself in a dark forest, for the clear path was lost..." -Dante Alighieri

  5. #5
    Will YOU be ready when the zombies rise? x88x's Avatar
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    Default Re: Watercooling pump question

    Quote Originally Posted by jdbnsn View Post
    You don't want to run water pumps in series, you can run them in parallel or in discrete loops. Just not in series
    Ok, thanks...come to think of it, if I ran them in series, the second one wouldn't do much, would it..either that or it would run too fast and do horrible things.

  6. #6
    iShot the Sheriff jdbnsn's Avatar
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    Default Re: Watercooling pump question

    Exactly! One will have far less resistance against the water pressure and the slower one will act as a resistor.
    "At the midpoint on the journey of life, I found myself in a dark forest, for the clear path was lost..." -Dante Alighieri

  7. #7
    One Eye, Sixteen Cores. Kayin's Avatar
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    Default Re: Watercooling pump question

    There are quite a few series pump tops to increase pumping head pressure. If you used matched pumps, any difference should be negligible.
    Project:Mithril, sponsored by Petra's Tech Shop and Sidewinder Computers-MOTM Nominee October '08




  8. #8
    . Spawn-Inc's Avatar
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    Default Re: Watercooling pump question

    series is perfectly fine so long as your pumps are matched.


    there is several tops that run series as kayin said. XSPC even just came out with a triple series ddc pump top.


    x88x i would highly recommend checking out this thread with some one that is building the same system as you, but for folding.

    http://www.ocforums.com/showthread.php?t=624109


    anyhow i would run the whole loop in series using 3-4 triple rads with 2 pumps in series.

    for tops check out XSPC.



    and here is a review round up of various tops for DDC pumps.
    CPU: Q6600 G0 3.5GHz@1.4v (4.2GHz max) / 4790k 4.8ghz @1.265v
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    CPU & GPU: 3x Swiftech MCR320, 2x MCP655, MCW60 R2, Dtek Fuzion V2, 18 high speed yates @ 5v

  9. #9
    iShot the Sheriff jdbnsn's Avatar
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    Default Re: Watercooling pump question

    I stand corrected!
    "At the midpoint on the journey of life, I found myself in a dark forest, for the clear path was lost..." -Dante Alighieri

  10. #10
    GIVE ME THE CAKE!!! p0Pe's Avatar
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    Default Re: Watercooling pump question

    +1 on running 3 ddc´s in series! it will give you the head preasure you need for a thing like this.

    then a mo-ra 2 pro for radiator.

    why is it that you dont go 5970 instead?

    and for the cooling, you would have to run the cards in parallel to get some decent results!

    the cosmos case should fit that mobo IIRC, and for pump top i would go for the xspc triple top!

    http://www.realredraider.com/vbullet...84&postcount=1
    is that a 120.9 raddy on your case, or are you just happy to see me?

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