Dynex 300 watt DX-PS300W

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  • golemmaster
    Senior Member
    • Jul 2009
    • 100
    • USA
    #1

    Dynex 300 watt DX-PS300W

    My brother has a never-used Dynex 300watt (DX-PS300W). I've gotten pretty cynical about power supplies. So I HAD to open it up and look around. I saw what I thought was pitiful things and voiced my criticism. Please, tell me if I over reacted.
    All the output caps were "UNITED" and were 10volt, even on the 12 volt line. I replaced all of those with 16v Rubycon and added an extra on the 12volt line since there was an unused space for it. Replaced a couple little ones including on the 5vsb line with Nichicon. The bridge rectifier are 4 diodes and the mains caps are a little small but I can't do anything about those.
    I have a ESR-micro 3.1 and all the caps check out. All the caps I have are good brands that I've scavenged from discarded/dead things.
    Did I over react? Should I give Dynex back a tiny bit of credit from my dis'ing it?

    Anyway... It works fine. I rewired the MB connectors to run a DELL GX110.
    The only thing I'm still worried about is the sleeve bearing fan seizing and killing it and my work.
    Tags: None
    • PCBONEZ
      Grumpy Old Fart
      • Aug 2005
      • 10661
      • USA
      #2
      Re: Dynex 300 watt DX-PS300W

      You didn't over react.
      .
      Mann-Made Global Warming.
      - We should be more concerned about the Intellectual Climate.
      -
      Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
      - Dr Seuss
      -
      You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
      -

        Comment

        • momaka
          master hoarder
          • May 2008
          • 12175
          • Bulgaria
          #3
          Re: Dynex 300 watt DX-PS300W

          I thought Dynex was made by Huntkey . Huntkey aren't great (they do blow up if you pull more than or close to their rated wattage), but they aren't total gutless wonders either... or are they now? Judging by your description, this one wasn't all that great (or maybe it wasn't a Huntkey).

          Originally posted by golemmaster
          The only thing I'm still worried about is the sleeve bearing fan seizing and killing it and my work.
          If the sleeve is cleaned well and oiled and if the fan is connected to a speed controller, it will probably be fine for the next 2-5 years, depending on how dusty your place is.

          I've had cheap fans last for many years (and still do). Biggest problem they have is that most of them aren't properly lubricated from the factory and tend to seize early. Once I fix this, they do pretty good.

            Comment

            • PCBONEZ
              Grumpy Old Fart
              • Aug 2005
              • 10661
              • USA
              #4
              Re: Dynex 300 watt DX-PS300W

              Dynex are made by whoever Best Buy is OEMing PSUs from at the time.
              It's a 'House Brand'.
              The one thing you can be sure of is that it's a cheap build.
              .
              Mann-Made Global Warming.
              - We should be more concerned about the Intellectual Climate.
              -
              Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
              - Dr Seuss
              -
              You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
              -

                Comment

                • 370forlife
                  Large Marge
                  • Aug 2008
                  • 3112
                  • United States
                  #5
                  Re: Dynex 300 watt DX-PS300W

                  It's most likely a Huntkey. I've yet to see any Dynex or Rocketfish that isn't.

                  Statistically speaking, any Chinese unit is most likely a Huntkey, they are the biggest Chinese power supply OEM.

                    Comment

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