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Thread: DC-AC-DC power supply or DC-DC powersupply

  1. #1
    Newbie alansupra94's Avatar
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    DC-AC-DC power supply or DC-DC powersupply

    I was wondering what is the best and most reliable way to power the computer.

    I am running a GX240 motherboard with a 2.4Ghz P4 and 512MB. I am also installing two 500GB SATA drives, possible an external HDD and a DVD-RW drive. Still not sure on a graphics card but I think I am leaning to an old FX5200.

    I already have a 300W inverter running to a ATX powersupply but I am not sure if it can keep up and before I buy a 500W or 1000W one I might as well ask if the DC-DC ones are better

    Thanks
    Alan
    1996 Toyota Supra NA-T
    Boostwerx T-61 w/ TT intake manifold
    MAP ECU 2

    @ 8psi making 320rwhp
    @ 24 psi making 480rwhp

    1988 Toyota Celica All-Trac
    CT26 turbo w/ aftermarket wastegate and BOV

    @ 12psi making 250awhp

  2. #2
    Admin. Linux loser.
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    Bugbyte's Avatar
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    Over 300 watts you are going to need to go with the inverter. The first thing you need to do is figure out how much power your computer draws. Go to either the FAQ's for links to power calculators or the FAQ Emporium for even more FAQs.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
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  3. #3
    Newbie alansupra94's Avatar
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    sweet thanks for the fast responce...yeah I might just buy a 1000W inverter and rest easy

    I just wonder how much battery it would drain.....
    1996 Toyota Supra NA-T
    Boostwerx T-61 w/ TT intake manifold
    MAP ECU 2

    @ 8psi making 320rwhp
    @ 24 psi making 480rwhp

    1988 Toyota Celica All-Trac
    CT26 turbo w/ aftermarket wastegate and BOV

    @ 12psi making 250awhp

  4. #4
    Admin. Linux loser.
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    Bugbyte's Avatar
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    Well, it isn't the inverter that drains the battery -it is your computer. Just because the inverter says it can supply 1000 watts doesn't mean that it draws 1000 watts at all times. If you have nothing hooked up to it, it should draw near zero. If you have a 400 watt PC connected to it, you will see it drawing a little north of 400 watts (there's some level of inefficiency in the device).

    I do know that some inverters tend to draw a small amount of power even when the computer is turned off and will eventually drain the battery. You have to switch them physically off to prevent power draw.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
    -Find out about the new iBug iPad install?
    -Find out about carPC's in just 5 minutes? View the Car PC 101 video

  5. #5
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    figure out what your system will draw for power and buy a DC to DC supply.
    It will save you from buying an inverter then later a DC to DC option when the inverter does not work well.
    TruckinMP3
    D201GLY2, DC-DC power, 3.5 inch SATA

    Yes, you should search... and Yes, It has been covered before!

    Read the FAQ!

  6. #6
    Newbie alansupra94's Avatar
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    Well the thing is that I doubt any DC-DC powersupply will be able to power my computer

    It is basically a full computer.....in a custom stainless steel case that I am making
    1996 Toyota Supra NA-T
    Boostwerx T-61 w/ TT intake manifold
    MAP ECU 2

    @ 8psi making 320rwhp
    @ 24 psi making 480rwhp

    1988 Toyota Celica All-Trac
    CT26 turbo w/ aftermarket wastegate and BOV

    @ 12psi making 250awhp

  7. #7
    Low Bitrate
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    Do not go with an inverter -they are very loud and you will get a ton of buzzing on but up and sirius, xm, hd radio, or any other radio you put in. I am dealing with it as we speak. Invest in a set up that you can use a AC to DC adapter....your will be better off in the long run.

    Cameron

  8. #8
    Admin. Linux loser.
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    Inverter installations without noise *can* be done. Just ask Enforcer. And DC-DC setups can also experience noise. Two of the primary rules are to ground everything to the same point, which reduces the chance of a ground loop and don't run your power wires next to your audio wires.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
    -Find out about the new iBug iPad install?
    -Find out about carPC's in just 5 minutes? View the Car PC 101 video

  9. #9
    Variable Bitrate bambam's Avatar
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    Quote Originally Posted by alansupra94 View Post
    I was wondering what is the best and most reliable way to power the computer.

    I am running a GX240 motherboard with a 2.4Ghz P4 and 512MB. I am also installing two 500GB SATA drives, possible an external HDD and a DVD-RW drive. Still not sure on a graphics card but I think I am leaning to an old FX5200.

    I already have a 300W inverter running to a ATX powersupply but I am not sure if it can keep up and before I buy a 500W or 1000W one I might as well ask if the DC-DC ones are better

    Thanks
    Alan

    I use an Opus 320W and power my ASRock 775i65G MB with 1G ram, 500G Seagate HD, 8.4" lilliput, 2 fans, usb hub and 5 usb devices with no problem. On my test bench, I also had a 2nd HD and a DVD drive.

    As far as noise, I have absolutely none. I grounded everything to a single ground (including the MB) and use a PAC SNI-1 Ground Loop Isolator & RCA Noise Filter.

    My project can be seen here:
    here

    Side note: I use onboard graphics and it plays all the movies, etc. that I throw at it so unless you are playing high end games (graphics), do you need a video card for more power drain?
    "Imagination is more important than knowledge." -AE

  10. #10
    Neither darque nor pervert DarquePervert's Avatar
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    Quote Originally Posted by alansupra94 View Post
    Well the thing is that I doubt any DC-DC powersupply will be able to power my computer
    Have you read the FAQs on POwer supplies?
    http://www.mp3car.com/vbulletin/advfaq.php


    It is basically a full computer.....in a custom stainless steel case that I am making
    A full computer as opposed to... what? A thin client terminal? A WinCE device?
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

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