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    HD7950 missing mosfet

    i guys I have this Dual X Radeon HD7950

    All the resistances check OK (and all other voltage rails are up) but I have a missing High side mosfet on the Vram VRM so that rail is down of course. Resistance on Vram is 60 ohm which is just fine.

    Does anyone know what the missing component should be?

    See pics - and thanks
    Attached Files
    Last edited by dicky96; 11-26-2021, 04:27 PM.
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    #2
    Re: HD7950 missing mosfet

    Is there a specific manufacturer for that card? I may know someone with that card but I'd like to be able to give all info available when asking.

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      #3
      Re: HD7950 missing mosfet

      OK Thanks, I'll check this morning and let you know
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        #4
        Re: HD7950 missing mosfet

        I didn't see as brand on it but hopefully these pics help?
        Attached Files
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          #5
          Re: HD7950 missing mosfet

          Maybe this Sapphire Radeon HD 7950 3GB GDDR5 PCI-E

          Comment


            #6
            Re: HD7950 missing mosfet

            Originally posted by dicky96 View Post
            i guys I have this Dual X Radeon HD7950

            All the resistances check OK (and all other voltage rails are up) but I have a missing High side mosfet on the Vram VRM so that rail is down of course. Resistance on Vram is 60 ohm which is just fine.

            Does anyone know what the missing component should be?

            See pics - and thanks
            There`s a Sapphire sticker and a part number on the pcb 109-C38137-00 .Had a look for a schematic,can`t find one.
            All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

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              #7
              Re: HD7950 missing mosfet

              Well spotted - yes it's that one for sure
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                #8
                Re: HD7950 missing mosfet

                Textolite with number 109-C38137-00 is the same as for SAPPHIRE DUAL-X R9 280 3GB GDDR5 OC WITH BOOST.

                Comment


                  #9
                  Re: HD7950 missing mosfet

                  Originally posted by lotas View Post
                  Textolite with number 109-C38137-00 is the same as for SAPPHIRE DUAL-X R9 280 3GB GDDR5 OC WITH BOOST.
                  Thanks for the info lotas .

                  NTMFS4C10N https://cdn.badcaps-static.com/pdfs/...3addefcd72.pdf

                  https://i2hard.ru/wp-content/uploads...0Dual-X/31.JPG
                  https://i2hard.ru/publications/21271/
                  All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

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                    #10
                    Re: HD7950 missing mosfet

                    Dual Channel mosfet??

                    Comment


                      #11
                      Re: HD7950 missing mosfet

                      @lotas @SMDFlea
                      Thanks guys, nice work. Parts ordered.


                      @pixcelart
                      No it's definitely as single channel mosfet
                      Last edited by dicky96; 11-27-2021, 09:56 AM.
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