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Thread: What to do when DC-DC is not enough

  1. #1
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    Unhappy What to do when DC-DC is not enough

    Hey guys,

    I am getting sick of my noisy image problems on my LCD. I know it's from that damn inverter. I am using a Tripplite 375 Watt inverter and running a Micro-ATX 300 Watt supply. It's a pretty beefy system. I want to get a DC-DC so bad, but there are 2 issues. One is that my Micro board takes one of those "extra" 4-pin CPU power connections and the other is that I haven't seen a DC-DC that will run at 300 Watt. I think I may even be able to get away with 250 Watt. But I know that doesn't even exist. Man, if I could just get id of that stupid image noise.

    I know it's coming from the inverter because I connected the PC in the trunk directly to house current, and there was no noise at all, clean as a whistle. But as soon as I grab power from the inverter, BOOM.....Noisy! Bah. I want a powerful DC-DC now.

  2. #2
    Maximum Bitrate GruvThang's Avatar
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    are you sure it is not a grounding issue?
    [COLOR=Navy][SIZE=1][FONT=Comic Sans MS]Tektility

  3. #3
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    Quote Originally Posted by GruvThang
    are you sure it is not a grounding issue?

    I tried everything. I grounded the PC to teh chasis of the car (got rid of half of the noise). Tried grounding the inverter to the chasis, no change. Grounded the negative going to the inverter to the chasis instead of battery ground, no change. Just about the only thing I haven't tried to do is take power from the distribution block rather than the battery "+" directly. Don't know if this will make a difference, but I haven't tried because everything else doesn't seem to work. Man, I wish someone who has a solid system working with an inverter could tell me how to configure the wiring, because obviously I am doing something wrong.

  4. #4
    Low Bitrate l9nux's Avatar
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  5. #5
    Variable Bitrate stimps's Avatar
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    you need to remove the filtering capacitors out of your power supply dont you?

  6. #6
    Raw Wave Confused's Avatar
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    What hardware are you running?

    A 150W Opus is going to probably give you about the same useable power as a 250W (or quite possibly even 300W) desktop power supply. People here have run 2.8GHz P4's with desktop hard drives and desktop DVD drives from a 150W Opus with room to spare.

    The Opus also has the 4 pin connector which you need.


    Garry
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  7. #7
    Maximum Bitrate DjBac's Avatar
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    Quote Originally Posted by Confused
    What hardware are you running?

    A 150W Opus is going to probably give you about the same useable power as a 250W (or quite possibly even 300W) desktop power supply. People here have run 2.8GHz P4's with desktop hard drives and desktop DVD drives from a 150W Opus with room to spare.

    The Opus also has the 4 pin connector which you need.


    Garry
    Yeah!!!
    The Opus is great!!!
    I am usein 150W Opus on a 3.0 P4, 521MB RAM, Laptop DVD, 1 HDD, Xenarc display, USB hub and some usb devices with no problem!!!!

  8. #8
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    If you really do require 300 watts (and most people don't), why not use two 150 watt power supplies? Seems like a simple answer to me.

  9. #9
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    Quote Originally Posted by Gruneun
    If you really do require 300 watts (and most people don't), why not use two 150 watt power supplies? Seems like a simple answer to me.

    Because 150 Watt Opus + 150 Watt Opus = $$$

    Way too much for this solution. There has to be a better way.

  10. #10
    Jesus Freak antimatter's Avatar
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    An opus should do you just fine. Get rid of that nasty old power hungry inverter. I went with an opus DC-DC becasue i couldn't justify going from DC-AC-DC at around 50% effeciencey

    Get 1 opus 150 or wait for opus to come out with there higher power one (250 i think)
    -Jesus- King of Kings Lord of Lords

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