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Is a DC-DC power supply worth it?

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  • Is a DC-DC power supply worth it?

    I like anyone around, has an inverter lying around the house, but the question is is it really worth buying a DC-DC power supply or should I just use an inverter.

    From what I know, DC-AC inverters sometimes do not give you a very good sine wave which could cause damage to sensitive power supplies, like a cpu psu.

  • #2
    An inverter shouldnt damage a PC power supply. The incomming AC is converted into DC anyway so the square wave of most inverters isnt a problem. They can sometimes cause noise in soundcards and they arent as nice looking as an internal DC-DC supply.

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    • #3
      Hey Bigj

      Why do you want to convert a 12vdc to 110/220Ac and then come back to dc ??

      Its little stupid. your also putting extra load on you car battery for this job also when you crank up ur car the inverter will cut the power to your car pc thus rebooting the system..... ??

      so I guess a good DC-DC PSu should be good for the car mp3.

      * WHY PLAY WITH AC POWER IN YOUR CAR BIG RISK

      Mastero

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      • #4
        Originally posted by Technics:
        <STRONG>An inverter shouldnt damage a PC power supply. The incomming AC is converted into DC anyway so the square wave of most inverters isnt a problem. They can sometimes cause noise in soundcards and they arent as nice looking as an internal DC-DC supply.</STRONG>
        Actually, it's not so black and white. Most (all?) PC power supplys have capacitors at the input for power factor correction, and to filter out DC elements. The square wave of an inverter can overhead and explode these capacitors. Some people remove them, which solves the problem. Others just leave them and never have a problem. Mainly, it depends on the quality of the inverter.

        But for what it's worth, a DC-DC is much better than an inverter as far as efficiency, size and noise goes. If you can afford it, go DC-DC.
        Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
        Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
        "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."

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        • #5
          could anyone direct me to a good site to buy a dc-dc PS(i dont have the know how to build one myself) or at least tell me how large / what type of power supply i need .. i have a p200mmx w/ 144mb ram and 3 small (&gt;5gb) hard drives, plus a usb network adapter and 2 pci cards

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