ECS nForce3-A: hot capacitor, brand new.

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  • larrymoencurly
    Badcaps Veteran
    • Oct 2004
    • 960
    • USA
    #1

    ECS nForce3-A: hot capacitor, brand new.

    This mobo has a KLS brand cap that runs very hot, over 60C in 24C surrounding air (I checked two mobos for this), and maybe should be changed to a Japanese one.

    It's C419, 1000uF, 6.3V, located at the front corner of the chipset heatsink, next to MOSFET Q51, (PHB55N03LTA, drops 3.3V to 1.6V), which reaches 90C. I'm also heatsinking this MOSFET.

    OTOH the caps for the CPU voltage regulator all seem to be Matsushita/Panasonic.
    Last edited by larrymoencurly; 01-31-2006, 12:15 AM.
    Tags: None
    • Rainbow
      Badcaps Legend
      • Aug 2005
      • 1371
      #2
      Re: ECS nForce3-A: hot capacitor, brand new.

      The cap is probably heated by the MOSFET. Maybe the MOSFET is used in linear voltage regulator? I've seen this on some board.

        Comment

        • gg1978
          Badcaps Veteran
          • Dec 2004
          • 431
          • USA
          #3
          Re: ECS nForce3-A: hot capacitor, brand new.

          Sounds like it could be the AGP Vreg then.. If you have an old 2X card in there, it'll output +3.3V, and with newer cards in there, it'll output ~1.5V. I suppose it could also be Vcore for the NF3 chipset, but that's usually implemented as a switcher, and i think Vcore for the NF3 is also ~1.5V, so that's a possibility too.

            Comment

            • larrymoencurly
              Badcaps Veteran
              • Oct 2004
              • 960
              • USA
              #4
              Re: ECS nForce3-A: hot capacitor, brand new.

              This MOSFET is located in front of the AGP slot, but I left the slot empty because I was using an old PCI graphics card so I could get a fairly accurate measure of the CPU power consumption. This mobo has no switching regulators, except for the CPU.

              The last time I had a good capacitor run this hot was with an old 300 MHz Celeron mobo with a MOSFET in its switching regulator for the memory running at 90C (outside case). Gluing a heatsink to to the MOSFET cooled it to 70C. No bulging capacitors yet in that mobo.

              BTW I was wrong about the capacitor being KLS brand. It's OST but also marked KLS.

                Comment

                • MD Willington
                  Badcaps Veteran
                  • Sep 2004
                  • 702
                  #5
                  Re: ECS nForce3-A: hot capacitor, brand new.

                  They generally are OST... My ECS/PCChips boards are well populated with them...

                  If it's a good board for you, recap it... I'm not recapping my PCChips board, the online NIC is busted, not worth it now IMHO...

                  MD
                  Ya'll think us folk from the country's real funny-like, dontcha?

                  The opinions expressed above do not represent those of BADCAPS.NET or any of their affiliates.

                    Comment

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