Possible bad caps on 7800GTX?

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  • TerraPhantm
    Member
    • Feb 2006
    • 10
    #1

    Possible bad caps on 7800GTX?

    Hi, recently, my 7800GTX has been showing extremely garbled pictures. Initially when this problem started ,the card refused to output video when using DVI-D, but with a DVI>Analog converter I was able to get video (but extremely garbled). I was desperate and flashed it to a 7800GT. I now get output on the DVI, but the image is still extremely garbled. I'm wondering if there's any possibility that I have bad caps. I've attached pictures of the 4 cylindrical capacitors my card has. Thanks in advance
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    • TerraPhantm
      Member
      • Feb 2006
      • 10
      #2
      Re: Possible bad caps on 7800GTX?

      argh, I just realised I put this in the wrong forum , can a mod please move it to "Identifying Bad Capacitor Problems" for me?

        Comment

        • dood
          Deputy dood
          • Mar 2004
          • 2462
          • USA
          #3
          Re: Possible bad caps on 7800GTX?

          Wouldn't that card still be under warranty?
          Ludicrous gibs!

            Comment

            • TerraPhantm
              Member
              • Feb 2006
              • 10
              #4
              Re: Possible bad caps on 7800GTX?

              Well I would RMA it, BUT (here's where I really feel stupid), I misplaced the cover for the heatsink that guides the airflow through the fins. I initially took it off, because I mounted a fan underneath it which reduced the cards temperatures by 20*C. So unless I can aquire the faceplate to an MSI gtx, or somehow find mine, I can't really RMA it.

                Comment

                • linuxguru
                  Badcaps Legend
                  • Apr 2005
                  • 1564
                  #5
                  Re: Possible bad caps on 7800GTX?

                  It's probably not a capacitor problem on the card (the caps look OK), but it could well be a PSU or motherboard cap problem causing poor voltage regulation. Check the PSU first.

                    Comment

                    • Mustang
                      Badcaps Veteran
                      • Dec 2003
                      • 203
                      #6
                      Re: Possible bad caps on 7800GTX?

                      I gather by 1 of your other posts that you o/c. Did you push the GPU, Mem or AGP buss a bit too far? You reflashed the bios to a lesser spec and that seemed to help a bit. Have you tried to underclock the GPU and/or memory to see if the problem diminishes moreso?

                        Comment

                        • TerraPhantm
                          Member
                          • Feb 2006
                          • 10
                          #7
                          Re: Possible bad caps on 7800GTX?

                          Originally posted by linuxguru
                          It's probably not a capacitor problem on the card (the caps look OK), but it could well be a PSU or motherboard cap problem causing poor voltage regulation. Check the PSU first.
                          I don't think its either mobo or PSU, because my 12V rail stays at 12.00V-12.01V even on full load (I checked this with a DMM), and the video card I'm using currently (an X800Pro) has no problems whatsoever. Also I had a friend test my 7800gtx and he had the same symptoms. My PSU is an OCZ PowerStream 520W.

                          Originally posted by Mustang
                          I gather by 1 of your other posts that you o/c. Did you push the GPU, Mem or AGP buss a bit too far? You reflashed the bios to a lesser spec and that seemed to help a bit. Have you tried to underclock the GPU and/or memory to see if the problem diminishes moreso?
                          I do OC, the videocard is PCIe, and I didn't touch the PCIe frequencies. I did have the card clocked to 500/1390(430/1200 is stock, 7800GT is 400/1000). I would try reducing the frequency farther, but I have trouble navigating windows with the way the video card currently outputs video.
                          Last edited by TerraPhantm; 02-07-2006, 12:53 PM.

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