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How to repair R300 Core (radeon 9500/9700)

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    #1

    How to repair R300 Core (radeon 9500/9700)

    This might seem a bit ambitious for a first post, but here goes...

    I was hoping someone here had some experience repairing things such as this. The GPU is in good working order it seems. However, without this cap functionality is limited (obviously). So, I have sent in a ticket to ATI hoping they could provide me with info about what the part is exactly so I can purchase it.. however I am not too sure they will assist me in this matter. Also, as it is so small and an SMD, I am not sure how I would get it in there guessing that normal soldering won't work.. not sure though, I am willing to try anything. I have included a link to a pic that shows the exact cap that is missing. Any help would be greatly appreciated.

    In case you are wondering, I think I might have knocked it off while i was scraping off the crappy thermal compound off the GPU in order to put in a new hsf as it seemed to be experiencing some heat-related artifacting.

    thanks
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    #2
    Re: How to repair R300 Core (radeon 9500/9700)

    without the card in hand its hard to tell what they are.
    i know they are vcore supply bypass caps.
    they will be low voltage low esr mlcc.
    i would look at a scrap late model mobo and rob one of the same size that shows very low esr out of circut.
    they are not likely to be a critical value.
    hell it may work fine without it.

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      #3
      Re: How to repair R300 Core (radeon 9500/9700)

      Probably easier to pick one off a dead/older memory DIMM, which will have a bunch of small bypass caps near each DRAM chip.

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        #4
        Re: How to repair R300 Core (radeon 9500/9700)

        So you all don't think that this cap would affect the card that much? I wodner what happened then. I can't get the card to work in AGP mode at all, according to smartgart. It can't do agp read or write.

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          #5
          Re: How to repair R300 Core (radeon 9500/9700)

          All those resistors do is change settings, i.e. remove one you remove a feature...

          It's how they make different models... If you add another resistor at one place there it will become the professional CAD/CAM version of the card... Lotsa info on the net about this...
          "The one who says it cannot be done should never interrupt the one who is doing it."

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            #6
            Re: How to repair R300 Core (radeon 9500/9700)

            nope those are vcore bypass caps.

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              #7
              Re: How to repair R300 Core (radeon 9500/9700)

              Sorry I can't be bothered to find a R300 card but here is a R420 where the method was changed to the same AMD uses on their processor to select which multiplier it will run at and other misc settings; laser cutting of traces... The older R300 core uses resistors for that instead

              http://www.techpowerup.com/articles/...ng/vidcard/100
              "The one who says it cannot be done should never interrupt the one who is doing it."

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