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Thread: ATX PC startup problem

  1. #11
    Constant Bitrate jboy's Avatar
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    What is the PS rated for,
    even a small 120w ps can draw over 400w for a very short surge at startup
    If you come out talking sh1t don't try to turn around and wipe you azz.

  2. #12
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    250W power supply in the computer.

  3. #13
    Constant Bitrate jboy's Avatar
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    The inverter is way too small!
    the 250w ps may only draw about 100w cont. to meet the power needs of your system but inrush current can be 2-5x the ps max rating until the internal caps are charged

    Solution 1
    Get a bigger inverter, 300-400w cont.to be safe

    Solution 2
    find the total power your system needs,
    and get a smaller PS that meets the systems power needs + say 10-20% more for stable operation and an inverter that can provide
    20-30% more than that cont. due to the computer ps inefficiency w/ a surge rating that can handle the startup

    Solution 3
    Get a DC-DC ps/2 power supply, they seem expensive but a powerfull enough inverter can cost nearly as much and the inverter and pc ps are both wasting alot more power than a dc-dc converter alone.
    If you come out talking sh1t don't try to turn around and wipe you azz.

  4. #14
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    Where is a good place to purchase a Dc-DC ATX power supply?

  5. #15
    Constant Bitrate jboy's Avatar
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    Keypower has afew to chose from depending on case (at/atx) check this site
    http://www.keypower.com/dcdcnew.html
    If you come out talking sh1t don't try to turn around and wipe you azz.

  6. #16
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    kind of a newbie question i guess...
    but if you get a bigger inverter (ie 300-400W vs 140W) and/or use a bigger power supply (ie 250W vs 145W) will it drain the battery more heavily even if your computer doesnt use all the current?

    and is your computer drawing current from the battery even when its off, if its plugged in through an inverter thats turned off?

    im kinda paranoid about killing my battery

  7. #17
    FLAC
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    Originally posted by mr0range:
    <STRONG>kind of a newbie question i guess...
    but if you get a bigger inverter (ie 300-400W vs 140W) and/or use a bigger power supply (ie 250W vs 145W) will it drain the battery more heavily even if your computer doesnt use all the current?

    and is your computer drawing current from the battery even when its off, if its plugged in through an inverter thats turned off?

    im kinda paranoid about killing my battery </STRONG>
    cut the power to the inverter and that will be the safest way to stop battery drain. as for bigger power supplies/inverters... basically no, the CPU/motherboard/HDD/etc will determine the amount of power drawn.
    Project - GAME OVER :(

  8. #18
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    Could putting a capacitor between my 12v source and the inverter keep the inverter from going into low voltage mode occasionally when the PC is connected to it. I haven't bought a Dc-DC power supply yet, so I'm having the same problem as described at the start of this post.

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