Polishing discoloured heat pipes on GPUs

Discussion in 'Modding' started by pwlm1975, Apr 5, 2019.

  1. pwlm1975

    pwlm1975 Member

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    Hi all,

    Just about to get hold of a Sapphire HD 7950 with a fair bit of discolouration on the heat pipes (copper). Anyone with experience on polishing those babies back up? What techniques/materials work best?
     
  2. DSTM (Dougie)

    DSTM (Dougie) Member

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    White Vinegar applied with an ear bud, carefully.
    Leave on for an hour, then wipe the pipes with a barely damp paper towel.
    Repeat if necessary.
     
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    pwlm1975

    pwlm1975 Member

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    Thanks Dougie, my plan is to strip it down, then do the same with the card, compressor on the PCB and fins, wipe the plastic shell down and the fans, new thermal paste, clean and polish the pipes, and reassemble. What have I missed?
     
  4. DSTM (Dougie)

    DSTM (Dougie) Member

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    Nothing that I can see. Careful wiping fan blades.They become brittle over time.
    I broke one.:shock:
     
  5. shane41

    shane41 Member

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    Remember the copper coins in Coca Cola trick
     
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    pwlm1975

    pwlm1975 Member

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    Thanks Shane. How might that affect the aluminium fins if it's gets spilled?
     
  7. shane41

    shane41 Member

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    Don't let it touch, if it does rinse it off, dry. Suspend the heatsink over the fluid so only the copper is immersed.

    Vinegar has been used a long time as a cleaner. + with bicarb soda it can be abrasive like a toothpaste. Belts mold for six in a 50/50 ratio :D
    Think pH4 so acidic same as dog piss. Why the dirty little fuckers used to rust my mag wheels.
    Alloy blocks in motors like up to pH 11 so alkaline. But you can over do it.

    Alloys, aluminium have a natural defense of repairing their surface. But galvanic corrosion is aided when the alloy is kept wet. A reason alloy windows have drain outlets.
    Alloys can stay great condition like corton steel if reduced from staying wet in the weather.
     
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