Main Identify a component Sapphire HD 7950 dual x missing capacitors

Viewing 8 posts - 1 through 8 (of 8 total)
  • Author
    Posts
  • #10734
    ZeeSarp
    Participant
      • Topics 2
      • Replies 2
      • Total 4
      • New Member

      Hello!

      A while ago when I was in desperate need for a GPU I was scammed by someone selling “used but working” GPUs.
      A computer using this card won’t show any picture, but fans start spinning and bios doesn’t seem to be detecting any errors.

      My first guess would be C1281, where a whole capacitor (+ pads) was ripped off.
      My second guess would be C2128 (hard to see, but one side of the capacitor is not touching the pad and the other pad is lifted).
      I’m not too sure about C2117. It looks to me like there isn’t supposed to be a capacitor, but maybe anybody here knows whether or not there should be a cap?

      I couldn’t find any schematics for this board, so I would appreciate any hints on what capacitors are missing here.

      #10741
      knw257
      Participant
        • Topics 0
        • Replies 8
        • Total 8
        • New Member

        I managed to find a board view schematic of a GPU that matches this card – FYI, the forums over on badcaps.net have a whole plethora of GPU schematics/boardviews. Anyway, I found one that seems to match the component positioning and numbering pretty much exactly. I’ve attached a few screenshots, and the zip file with the boardview, but here’s what I think you are looking for:

        C1281: MLCC 22UF/4V (0805) X6S 20% MURATA/GRM21BC80G226M
        C2117: MLCC 0.1UF/6.3V(0402)X7R 10% TDK/C1005X7R0J104KT
        C2128: MLCC 10UF/6.3V (0805) X5R 10% YAGEO/CC0805KKX5R5BB106

        #10747
        knw257
        Participant
          • Topics 0
          • Replies 8
          • Total 8
          • New Member
          #10758
          ZeeSarp
          Participant
            • Topics 2
            • Replies 2
            • Total 4
            • New Member

            This is amazing, thank you so much!

            #10778
            ZeeSarp
            Participant
              • Topics 2
              • Replies 2
              • Total 4
              • New Member

              Seems like Mouser doesn’t have a replacement cap for C2117.
              The only X7R 10& 0.1uF/6.3V capacitor made by TDK I was able to find was the wrong size (0603 and 0805 instead of 0402).

              Do you think it would be okay to choose a different manufacturer, as long as the other specifications match?

              #10800
              knw257
              Participant
                • Topics 0
                • Replies 8
                • Total 8
                • New Member

                Caps are caps, more or less – using another mfr usually won’t be a big deal, but you can also try other distributors, like digikey, arrow, etc. For instance, I found this from digikey – 0402 0.1uF X7R. It’s 25v, but that’s fine, as it’s just a max voltage rating, so I’d imagine it would suite your needs just fine – https://www.digikey.com/en/products/detail/aillen/0402B104K250HI/14670955

                Arrow looks like they have an even larger selection. Basically, as long as the base properties are similar, it should work just fine

                • This reply was modified 2 months ago by knw257. Reason: Added link
                • This reply was modified 2 months ago by knw257. Reason: Added link
                #10803
                knw257
                Participant
                  • Topics 0
                  • Replies 8
                  • Total 8
                  • New Member

                  Caps are caps, more or less – using another mfr usually won’t be a big deal, but you can also try other distributors, like digikey, arrow, etc. For instance, I found this from digikey – 0402 0.1uF X7R. It’s 25v, but that’s fine, as it’s just a max voltage rating, so I’d imagine it would suite your needs just fine. Arrow looks like they have an even larger selection. Basically, as long as the base properties are similar, it should work just fine

                  #10861
                  Khaelgor
                  Participant
                    • Topics 0
                    • Replies 1
                    • Total 1
                    • New Member

                    I actually own this card in working order in a computer I no longer use. Here is an image of the back for reference.

                    If you need a close up, just let me know.

                    Attachments:
                  Viewing 8 posts - 1 through 8 (of 8 total)
                  • You must be logged in to reply to this topic.