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Thread: inverter and power supply wattage

  1. #1
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    inverter and power supply wattage

    i've read a lot about dc/dc psu and how it is more efficient than using an iverter. however, that is not an option for me since none of those dc/dc converters are available at my area.

    anyway, i would just like to ask if this is possible:

    cpu piii (126w [151w if with dvd] total using power supply calculator) ==> psu (300w) ==> inverter 150w (peak 200w) ==> car battery

    the only available inverters i could get are the 150w and a 600w. i think the 600w is sort or overkill.

    am i gonna get in trouble using this setup?

    thanks for your answers. and pls dont bash me if you think my post is stupid

  2. #2
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    you could always order a dc 2 dc off the net, i'll be doing this soon.

    i tried using a 400 watt inverter with my setup(see my setup in my sig), but then upgraded to a 800 watt
    PC
    AMD 3500+ 2.2Ghz, MSI K9VGM-V Motherboard,
    Geil 512MB PC4200 DDR2-RAM, 7" Lilliput Touchscreen, 30GB HD
    Audio
    300 watt RMS 2 Channel MTX AMP, 500 watt RMS D-Class MTX AMP, 2 Front - 5 1/4" Sony Xplods,
    2 Back - 6 1/2" Sony Xplods, 12" MTX Sub

  3. #3
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    @legacy

    where are you from? i could order online but im on a really tight budget right now. item cost + shipping (philippines) is too much for me. not to mention the shipping and reshipping in case i get a faulty one.

    anyway, thanks for your input

  4. #4
    FLAC evandude's Avatar
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    inverters are usually not very high-quality devices. Thus, it's probably better to buy one that's rated to a higher wattage than what you will be running it at, so it will be running well below its maximum power limit, and thus shouldn't be straining as hard and will be less likely to fail. 600 watt is overkill for a 150w system, but it's still a better choice than a 150w inverter that can barely handle it. I use a 250-300W inverter for my system that uses under 100W, and the inverter hardly strains, and doesn't get extremely hot, so I feel safer despite the fact that it's pretty cheaply made.
    But don't take it from me! here's a quote from a real, live newbie:
    Quote Originally Posted by Viscouse
    I am learning buttloads just by searching on this forum. I've learned 2 big things so far: 1-it's been done before, and 2-if it hasn't, there is a way to do it.
    eegeek.net

  5. #5
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    thanks!

    does a 300w psu always pull in 300w of power from the source or just enough of what the computer needs (i.e. 150w)?

  6. #6
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    Quote Originally Posted by ariz_benedict View Post
    @legacy

    where are you from? i could order online but im on a really tight budget right now. item cost + shipping (philippines) is too much for me. not to mention the shipping and reshipping in case i get a faulty one.

    anyway, thanks for your input
    i live in saskatchewan, canada, aswell im 18 so i ant loaded either, i've bought a screen from mp3car.com, and after christmas i'll be buy the dc-dc power supply as inverter works for my setup, but its not as smooth as i'd like.
    PC
    AMD 3500+ 2.2Ghz, MSI K9VGM-V Motherboard,
    Geil 512MB PC4200 DDR2-RAM, 7" Lilliput Touchscreen, 30GB HD
    Audio
    300 watt RMS 2 Channel MTX AMP, 500 watt RMS D-Class MTX AMP, 2 Front - 5 1/4" Sony Xplods,
    2 Back - 6 1/2" Sony Xplods, 12" MTX Sub

  7. #7
    Low Bitrate com2soft's Avatar
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    I used a 200W inverter and a 220W 1U size ATX without a problem before. The ATX 12V has max. 140W. so it is good for some hungry mobo.

  8. #8
    Vik
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    Question How do I find out what kind of PSU I need?

    Just because I have no clue at all, I tend to use my old desktop a Compaq EVO W6000
    as my next parpc.

    I also don't know what kind of motherboard i have inthere so I did a quick search on Google and came up with this: http://www.ciao.co.uk/Compaq_Evo_Wor...W6000__5361157

    Here it says this about my Mainboard
    Chipset Type: Intel 860

    Data Bus Speed: 400 MHz


    And now????

    Thanks
    __________________
    Yes, Yes, Yes I have a new car. No Fuct under my arse anymore,
    and also some pictures,

    Fuct Escrot MKV

  9. #9
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    thanks com2soft for the reply!

    @vik
    try this:
    http://www.journeysystems.com/power_...calculator.php

    @all using inverter solution:

    do you plugin you psu direct to the inverter or are you using an AVR/UPS in between to regulate the current?

    thanks again!

  10. #10
    Vik
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    thanks ariz_benedict,

    But now it seems I need a PSU for 390 Watts I think I'll be going to use an other PC

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