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HD5870 Modding to WATER: How important to cool these chips?

Discussion in 'Overclocking & Cooling' started by Sasqui, Feb 7, 2010.

  1. Sasqui

    Sasqui

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    I'm putting a Swiftech waterblock on an XFX XXX 5870...

    Using Enzotech copper coolers, but I cannot get the smaller coolers to stick on the silicon of some smaller VRM chips. Cleaned well with 91% alcohol, etc. Memory and all others are secure. The problem chips are shown here (there's one more towards the fronth of the card):

    [​IMG]

    I see on my cooler and the TPU 5870 and 5850 reviews, that the stock heat plate has cooling pads for those:

    http://www.techpowerup.com/reviews/ATI/Radeon_HD_5870/4.html

    http://www.techpowerup.com/reviews/HIS/HD_5850/4.html

    So, if I leave them BARE, will I do damage, etc.???

    :wtf:
     
    Last edited: Feb 7, 2010
    10 Year Member at TPU Crunching for Team TPU
  2. InTeL-iNsIdE Guest

    They do indeed look like vrm's and if that is the case I would be weary not having some kind of cooling on them as they can get very toasty, though I have no idea how they get on the 5 series cards, I would suggest getting some thermal tape/adhesive just to be on the safe side.
     
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  3. erocker

    erocker Super Moderator Staff Member

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    They most definitely need to be heatsinked for cooling. Active cooling (side fan, fan blowing on them etc.) if possible. Maybe consider getting a full coverage block.
     
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  4. stanhemi

    stanhemi New Member

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    probably need something like this or similar or a full waterblock
    [​IMG]
     
  5. Sasqui

    Sasqui

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    THX for the replies... shit! The thermal tape supplied with the Enzotech just wont stick to them - even tried 100% acetone :banghead:. I'm considering roughing them up at the surface with fine grit now... BRB
     
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  6. pantherx12

    pantherx12

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    No need, buy some akasa a55 silicon thermal paste, its sticky but not an epoxy so it can hold small heatsinks down no problem!
     
  7. Sasqui

    Sasqui

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    I'm sure that would be better...

    So far, a roughing up with 400 grit on a chip, now it's holding... More to come.
     
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  8. cadaveca

    cadaveca My name is Dave

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    You MUST cool those chips, or your card will die a quick death.

    TIP: Zipties, Zipties, Zipties. Cops use 'em instead of handcuffs, i use 'em for wire management, and to make things stay in place ;) That said, I'd be using a thermal pad to "buffer" those chips so that the heatsink doesn't rock in place and crush this chips...think a la old AMD Barton chips, with pads outside the silicon...and zipties teh heatsink down using the provided holes in the pcb. ;)
     
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  9. angelkiller

    angelkiller

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    'Roughing them up' sounds like a bad idea. People lap CPUs to get them flatter, so they can make better contact with a heatsink. Making the surface rougher, may allow an adhesive to stick, but I would think that this hurts heat transfer.

    My ideal solution would be this. But I don't know compatibility or cost. Maybe it's moddable?
     
  10. pantherx12

    pantherx12

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    Doing it right now, works a treat.
     
  11. SystemViper

    SystemViper

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    keep us posted on the kinda gains you will get from water, i was thinking of getting the koolance full card block
     
  12. Beertintedgoggles

    Beertintedgoggles

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    If you wanted a ghetto solution to it, this should be pretty simple since they all seem to align in a straight line. Also they are pretty much centered (not offset) from the through-holes. If you can make a small (maybe 3mm wide) piece of metal (or other rigid material you can find) that's long enough then you could use that a type of screw down retainer to hold the heat sinks on. I've actually used this approach on some mods of my own; I'd take a picture but I'm away thanks to business for I don't know how much longer... It'd look something like in the very quick sketch below:

    [​IMG]

    Disclaimer: I never said it'd look good.
     
    Last edited: Feb 7, 2010
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  13. wakkierob

    wakkierob New Member

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  14. Sasqui

    Sasqui

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    I was going to do something along those lines... after the 400 grit, the one I've tried seems to have held pretty good.

    I had to slice a few of the copper one in half using a drill press... slide vise and dremel cutoff. About to clean those up and install.

    Will be setting on a radiator overnight to see how they hold.

    One lesson learned - always have a backup video card! LOL :laugh:
     
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  15. Sasqui

    Sasqui

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    That's where I was headed at one point... and I'm not looking for beauty!

    [​IMG]

    Works for the back of the card - there is one more of those towards the I/O part... I'll be posting pics of what I whink may work (without testing yet) :)
     
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  16. Sasqui

    Sasqui

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    Here's the first one:

    [​IMG]

    Pray... :respect:
     
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  17. cadaveca

    cadaveca My name is Dave

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    You best put a fan blowing in them...
     
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  18. MKmods Case Mod Guru

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    ur pretty brave to use ANY tape to hold all those pieces on (I wouldnt) as the part heats up the tape becomes weaker and all it takes is 1 piece to drop and make a short.
     
  19. Sasqui

    Sasqui

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    The side fan from the HAF will do the trick... I figure it's better than the relatively passive plate they had on to begin with.

    I'm thinking of roasting the card heatinsk down for a night at 170f..

    I'm I fucking nuts?
     
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  20. MKmods Case Mod Guru

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    YES

    I LOVE the enzo coolers but I use AS epoxy to mount them. But because you have such an expensive card that wouldnt help much for RMAs.

    I would make a piece that held down the pieces and mounted using the holes in the card.

    Or I would dissect the original cooler and mount the water block into it.

    Both ways is a pain in the ass but would a LOT safer for such a $$$ card.

    (normally I dont like full coverage water coolers but this is one of the reasons to use one)
     
    Last edited: Feb 7, 2010
    Sasqui says thanks.
  21. Sasqui

    Sasqui

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    Thank you MK! :toast: (compliment)... After some work, it came out well...

    I wouldn't try to move the card via the small heatsinks... but I can lift the card easily with the ram sinks and the other large one (whatever they are cooling):

    [​IMG]

    Here's the reason for doing all this!

    [​IMG]

    I'm going to "Bake" this tonight on a radiator... should get to 150f or more. Might put in the oven upside-down after that to make sure nothing "falls off" lol :roll:
     
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  22. MKmods Case Mod Guru

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    will you have a fan on the heatsinks too? It would be interesting to see the difference in temps with/without a fan.
    (I was thinking of making some air/water hybrid coolers for the 5830s if they ever show up)
     
  23. Sasqui

    Sasqui

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    It'll be sitting front and center of a 230mm HAF case fan... All of those components are under a stock heat-spreader plate with thick thermal pads. I.E.> it's got to be better than stock now. Unless one of the heatsinks falls off. :roll:
     
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  24. MKmods Case Mod Guru

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    I never compared tape to the thicker pads but they have to suck when it comes to transferring heat.

    Could you please take a pict of the back side of the stock cooler?
     
  25. Sasqui

    Sasqui

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    MKmods says thanks.
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