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Thread: Can't figure out the right PSU!!

  1. #1
    Low Bitrate The1Architect's Avatar
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    Can't figure out the right PSU!!

    not that the information and posts in this forum and FAQ isn't enough to figure this out it is actually more than enough.. in fact it's too much that got me confused

    also there is alot to choose from and alot of different ways and methods to do it. so please help me do this.

    I know my system is in need for aproximatly 265W according to some power calculators provided by the FAQ and since the next step up from 250W PSU's are the 320W so i figured that the OPUS 320W Intelligent DC-DC would do it but its too expensive i was thinking of $100-150 for a PSU. However, i don't mind buying it if going with other options would end up making me spend what I save on extra stuff that the OPUS 320W doesn't need.

    also am intresed in auto ingnition when the car starts (don't know how it works)

    here is what I think i should put everything together:



    does anyone know for sure if I can get away with a 250W PSU?

    -
    >> > Design & Planning . . . . . . . . . . . . . . . . . . . . 100%
    > Software Installation . . . . . . . . . . . . . . . . . . . .98%
    > Hardware Installation . . . . . . . . . . . 55%
    >>> Overall Progress . . . . . . . . . . . . . . . . .85%

  2. #2
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    Quote Originally Posted by The1Architect View Post
    I know my system is in need for aproximatly 265W according to some power calculators provided by the FAQ and since the next step up from 250W PSU's are the 320W so i figured that the OPUS 320W Intelligent DC-DC would do it but its too expensive i was thinking of $100-150 for a PSU. However, i don't mind buying it if going with other options would end up making me spend what I save on extra stuff that the OPUS 320W doesn't need.
    If you've calculated that you need 265W, then yes your best bet is the opus you linked. Almost all dc-dc car power supplies, including the opus, are "intelligent". This means that they will power on with the car, and shutdown the computer properly when you turn off the car.

    Almost all dc-dc car supplies are more expensive then their 'home' counterparts because of the "intelligent" feature, and the compact designs. If you want to spend under $150 for a car power supply, its possible -- but you'll have to change your computer components so that it doesn't require so much wattage. Hence why VIA boards are so popular =)

  3. #3
    Variable Bitrate hailrazer's Avatar
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    Well just to let you know, I am using a M4-Atx right now with the following :

    2.6 GHz AMD Athlon 64 X2 5000+ dual-core processor (1 MB cache),
    500 GB hard drive,
    2 GB RAM
    Geforce 8400 256mb PCI-E video card
    Multi-format/dual-layer LightScribe DVD drive
    10.4" Shark touchscreen
    USB GPS
    USB HD Radio
    USB XM Radio
    USB Touchpad
    USB Griffin Volume control.

    And it runs perfect , no problems at all.

  4. #4
    Low Bitrate The1Architect's Avatar
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    Quote Originally Posted by NotYou View Post
    If you've calculated that you need 265W, then yes your best bet is the opus you linked. Almost all dc-dc car power supplies, including the opus, are "intelligent". This means that they will power on with the car, and shutdown the computer properly when you turn off the car.

    Almost all dc-dc car supplies are more expensive then their 'home' counterparts because of the "intelligent" feature, and the compact designs. If you want to spend under $150 for a car power supply, its possible -- but you'll have to change your computer components so that it doesn't require so much wattage. Hence why VIA boards are so popular =)
    what about the diagram does it look right ?
    >> > Design & Planning . . . . . . . . . . . . . . . . . . . . 100%
    > Software Installation . . . . . . . . . . . . . . . . . . . .98%
    > Hardware Installation . . . . . . . . . . . 55%
    >>> Overall Progress . . . . . . . . . . . . . . . . .85%

  5. #5
    Low Bitrate The1Architect's Avatar
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    Quote Originally Posted by hailrazer View Post
    Well just to let you know, I am using a M4-Atx right now with the following :

    2.6 GHz AMD Athlon 64 X2 5000+ dual-core processor (1 MB cache),
    500 GB hard drive,
    2 GB RAM
    Geforce 8400 256mb PCI-E video card
    Multi-format/dual-layer LightScribe DVD drive
    10.4" Shark touchscreen
    USB GPS
    USB HD Radio
    USB XM Radio
    USB Touchpad
    USB Griffin Volume control.

    And it runs perfect , no problems at all.
    are you using a VIA board?

    and where did you get your touchpad from?
    >> > Design & Planning . . . . . . . . . . . . . . . . . . . . 100%
    > Software Installation . . . . . . . . . . . . . . . . . . . .98%
    > Hardware Installation . . . . . . . . . . . 55%
    >>> Overall Progress . . . . . . . . . . . . . . . . .85%

  6. #6
    Variable Bitrate hailrazer's Avatar
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    Quote Originally Posted by The1Architect View Post
    are you using a VIA board?

    and where did you get your touchpad from?
    It's an AsusTek motherboard.

    Here's my touchpad. I actually got it off Ebay but you can order straight from their site to :
    http://www.ergonomictouchpad.com/ergonomic_touchpad.php

  7. #7
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    Quote Originally Posted by hailrazer View Post
    Well just to let you know, I am using a M4-Atx right now with the following :

    2.6 GHz AMD Athlon 64 X2 5000+ dual-core processor (1 MB cache),

    And it runs perfect , no problems at all.
    AMD processors are lower wattage then Intel... and especially P4's. If memory serves me right, your processor uses around 65watts on average, and the P4 will be over 100watts.

    It's quite possible the m4-atx will work fine for the OP, and would probably work without issues, but there could be problems if heavy CPU usage occurs.

  8. #8
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    Quote Originally Posted by The1Architect View Post
    what about the diagram does it look right ?
    Close... couple of things to be aware of based on what I see if your diagram:

    • The ground from the power supply should go to the chassis, and be very close (1-3 ft) to the power supply. No need to go all the way back to the battery
    • Connect the DVD drive to the power supply, not the battery.
    • Don't connect the LCD to the battery. Either connect it to the power supply like everything else, or connect it to the ACCESSORY 12v. Otherwise, as you have it the lcd will always be powered (= battery drain)
    • You need both 12v and 5v going to the HDD.. you probably already know that, but there was only one power wire going to it in the diagram. =)
    • You will need a wire going from the car's accessory wire to the power supply as well. This is what triggers the power supply to use its "intelligence" to turn on and of.
    • There will be other, smaller connections to make that you'll find out as you hook everything up -- nothing major though. (i.e. a pair of small wires from the power supply to the power switch on the motherboard.)
    • Don't forget to connect your sound card to your amplifier/speakers =)

  9. #9
    Low Bitrate The1Architect's Avatar
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    Quote Originally Posted by NotYou View Post
    AMD processors are lower wattage then Intel... and especially P4's. If memory serves me right, your processor uses around 65watts on average, and the P4 will be over 100watts.

    It's quite possible the m4-atx will work fine for the OP, and would probably work without issues, but there could be problems if heavy CPU usage occurs.
    well most of the cumputer components I already have setting there as an extra PC before I decided to turn it into a CarPC other wise my chioces of equipments would be much different

    i guess i dont wanna risk it and just buy the 320W well $185 is not much more than $150

    so what about the diagram I drew it thinking its that simple but since it was really simple to do it that made feel that its definitly not right
    >> > Design & Planning . . . . . . . . . . . . . . . . . . . . 100%
    > Software Installation . . . . . . . . . . . . . . . . . . . .98%
    > Hardware Installation . . . . . . . . . . . 55%
    >>> Overall Progress . . . . . . . . . . . . . . . . .85%

  10. #10
    Low Bitrate The1Architect's Avatar
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    Quote Originally Posted by NotYou View Post
    Close... couple of things to be aware of based on what I see if your diagram:

    • The ground from the power supply should go to the chassis, and be very close (1-3 ft) to the power supply. No need to go all the way back to the battery
    • Connect the DVD drive to the power supply, not the battery.
    • Don't connect the LCD to the battery. Either connect it to the power supply like everything else, or connect it to the ACCESSORY 12v. Otherwise, as you have it the lcd will always be powered (= battery drain)
    • You need both 12v and 5v going to the HDD.. you probably already know that, but there was only one power wire going to it in the diagram. =)
    • You will need a wire going from the car's accessory wire to the power supply as well. This is what triggers the power supply to use its "intelligence" to turn on and of.
    • There will be other, smaller connections to make that you'll find out as you hook everything up -- nothing major though. (i.e. a pair of small wires from the power supply to the power switch on the motherboard.)
    • Don't forget to connect your sound card to your amplifier/speakers =)
    connecting the LCD to an ACCESSORY 12v.... now what is the Accesspry 12V?

    and for running the wire from the PSU to the car's accessory wire i heard of that and i put in the diagram but don't know how to do it or where would i find the car's accessory wire

    are they both the same and where are they ?

    how is this?



    -
    >> > Design & Planning . . . . . . . . . . . . . . . . . . . . 100%
    > Software Installation . . . . . . . . . . . . . . . . . . . .98%
    > Hardware Installation . . . . . . . . . . . 55%
    >>> Overall Progress . . . . . . . . . . . . . . . . .85%

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