Saphire HD 7770 OC version

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  • chrle
    Senior Member
    • Sep 2013
    • 158
    • slovakia

    #1

    Saphire HD 7770 OC version

    hello ,I have saphire HD 7770,and no signal on monitor.

    I boot up with another gpu and windows recognize HD 7770 but no video..

    booting with only HD 7770 = no bios,no post,nothing. blank screen

    Any ideas?
    Attached Files
  • Agent24
    I see dead caps
    • Oct 2007
    • 4951
    • New Zealand

    #2
    Re: Saphire HD 7770 OC version

    Bad video BIOS? Try reflash?
    "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
    -David VanHorn

    Comment

    • chrle
      Senior Member
      • Sep 2013
      • 158
      • slovakia

      #3
      Re: Saphire HD 7770 OC version

      I will try to reflash tomorrow.

      Comment

      • chrle
        Senior Member
        • Sep 2013
        • 158
        • slovakia

        #4
        Re: Saphire HD 7770 OC version

        I reflashed bios but still nothing.

        any ideas?

        Comment

        • Agent24
          I see dead caps
          • Oct 2007
          • 4951
          • New Zealand

          #5
          Re: Saphire HD 7770 OC version

          I don't know. Unless you have the wrong BIOS or something? I don't know what it means when half the stuff in GPU-Z is detected as "unknown"

          Or maybe something wrong with the card's onboard power supply?
          "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
          -David VanHorn

          Comment

          • chrle
            Senior Member
            • Sep 2013
            • 158
            • slovakia

            #6
            Re: Saphire HD 7770 OC version

            I downloaded bios from http://www.techpowerup.com/vgabios/i...&model=HD+7770

            Comment

            • chrle
              Senior Member
              • Sep 2013
              • 158
              • slovakia

              #7
              Re: Saphire HD 7770 OC version

              in GPU-z says amd radeon R 7 200 but this is HD 7000 series..

              strange

              Comment

              • chrle
                Senior Member
                • Sep 2013
                • 158
                • slovakia

                #8
                Re: Saphire HD 7770 OC version

                new pic
                Attached Files

                Comment

                • Agent24
                  I see dead caps
                  • Oct 2007
                  • 4951
                  • New Zealand

                  #9
                  Re: Saphire HD 7770 OC version

                  No idea, maybe it has a hardware fault.
                  "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
                  -David VanHorn

                  Comment

                  • momaka
                    master hoarder
                    • May 2008
                    • 12170
                    • Bulgaria

                    #10
                    Re: Saphire HD 7770 OC version

                    When the GPU or memory clocks are not running, that can also mean that either power is not getting to the GPU or GPU needs a reflow.

                    I had a similar problem with a Radeon 9700. No display or anything, but with a PCI-E video card, the PC was detecting the Radeon 9700 video card but just refusing to run it.
                    Last edited by momaka; 02-04-2015, 04:27 PM.

                    Comment

                    • Agent24
                      I see dead caps
                      • Oct 2007
                      • 4951
                      • New Zealand

                      #11
                      Re: Saphire HD 7770 OC version

                      Yeah, power supply is what I was thinking too.

                      Check the VRM circuits - are they outputting anything? I assume you don't have a schematic. Find all the ICs likely to be VRM controllers\DC-DC controllers etc and look up the datasheets, find out where the outputs are and see if voltages are present and make sense.
                      "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
                      -David VanHorn

                      Comment

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