Why they keep using superfasts for +12 V?

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  • Behemot
    Badcaps Legend
    • Dec 2009
    • 4845
    • CZ
    #1

    Why they keep using superfasts for +12 V?

    It is something I do not understand. Even if there is decent-rated rectifier, it is still superfast in most of the crappier PSU's. Note that by using shottky you can save very high ammounts of power and raise the efficiency pretty much.

    Are superfasts so much cheaper over shottkies?
    Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

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    • rogfanther
      Badcaps Veteran
      • Jul 2006
      • 458
      • Brazil
      #2
      Re: Why they keep using superfasts for +12 V?

      Simply put, yes. Some 2 cents cheaper, but in the big volumes, that add up.

        Comment

        • Pentium4
          CapXon Be Gone
          • Sep 2011
          • 3741
          • USA
          #3
          Re: Why they keep using superfasts for +12 V?

          annoying, right? the POS i was analyzing the other day had schottky's for the 5V and 3.3V but an ultra fast recovery diode on the 12V....why not the other way around?!

            Comment

            • Behemot
              Badcaps Legend
              • Dec 2009
              • 4845
              • CZ
              #4
              Re: Why they keep using superfasts for +12 V?

              Most likely cause it's meant for older systems draining power from +5 V/+3,3 V. Low voltage = high current = higher loss. Well on 12 V you have lower current drain so there is not so high loss, right?
              Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

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                • Pentium4
                  CapXon Be Gone
                  • Sep 2011
                  • 3741
                  • USA
                  #5
                  Re: Why they keep using superfasts for +12 V?

                  True. But it's been a while since Pentium 3's and Athlon XP's ruled the land

                    Comment

                    • Behemot
                      Badcaps Legend
                      • Dec 2009
                      • 4845
                      • CZ
                      #6
                      Re: Why they keep using superfasts for +12 V?

                      Yep. Well it's been a while since they made good PSU
                      Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

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