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Thread: PSU Wattage questions

  1. #1
    Newbie White 350z's Avatar
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    PSU Wattage questions

    Hi all! I'm new to MP3car.com, but I'm loving it (been on here for several hours every night for the past few days). You guys are great - 0l33l already helped me with a monitor question. My question is lengthy, so please bear with me.

    I'm getting ready to buy my parts for my CarPC, but I'm not sure if an Opus 150W will handle either of my setups (I have 2 in mind, not sure which one I want). I've looked at the various calculators such as http://carpc.kyferez.com/Tools/PSUWa...alculator.html and http://www.ohmygodmyarmfelloff.com/MP3Car/PSUpower.asp but I'm still not sure about my setup and the Opus. And I've searched the PSU section as well, but didn't come up with an answer.

    yes I've searched and searched. Anyway, here goes.

    Setup 1
    - Mobile Barton 2400+ (35W)
    - nforce2 mobo (atx, not micro)
    - not sure if I'll use onboard video or radeon 9000 agp card
    - 2x256MB DDR400 Ram
    - 160GB 3.5" SATA Hard drive
    - Slim DVD drive (USB)
    - USB devices - keyboard, mouse, GPS
    - 7" Xenarc touchscreen
    - Might use a turtle beach sound card if onboard sux
    - Wireless-G PCI Card
    - 3 Fans

    Setup 2
    - Athlon 64 chip Venice core (66W)
    - MSI MicroATX board with onboard video http://www.msicomputer.com/product/p...M2-IL&class=mb
    - rest same as above

    With either setup, some of the calculators say I'm right at 150W, others say i'm in the 200+ range. I've read on here that some people have had their opus do fine for a while and then die after a while because their system was too big for it. I don't want that to happen to me a few months down the road.

    Is either system too big for an Opus 150W?
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    Home Rig -
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    Gigabyte 6600 128MB PCI-E Video Card
    (4) 9GB U160 SCSI HDDs in 36GB Raid 0 Array
    160GB Seagate S-ATA Drive w/NCQ
    Dell 20.1" Widescreen LCD

  2. #2
    MySQL Error MatrixPC's Avatar
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    Setup 1 seem to work IF you are using on board graphic or low power AGP card.
    When using onboard, you must double check wether DDR400 RAM work with it or not. I seen people complaint about that. Better off using DDR333.
    Another way to calculate Wattage is single out each of the device add up all of them and compare to the Opus output. How many amp is needed for each particular power rail (5V, 12V). It look like you are using more power on the 5V rail.
    Why don't you use mATX mobo instead of full size (unless you already has one laying around.) Does that board work with mobile AMD?
    Better yet, email Opus and ask them if the 150W handle your setup.

    I don't think 150W can power your setup 2.
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  3. #3
    FLAC evandude's Avatar
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    http://www.lostcircuits.com/cpu/amd_venice/6.shtml

    that shows venice core athlon 64's running in the 20-30 watt range. I haven't used one or done any testing personally, but that makes it sound promising.
    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

  4. #4
    Newbie White 350z's Avatar
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    How will I know if I'm drawing too much from the Opus? Is there a way to hook up a multimeter or some other device to it and find out if I'm pushing it too hard?
    CarPC Status
    [|---------] 10% Complete

    Home Rig -
    Athlon 64 (939) 3200+ (Watercooled)
    DFI NF4 SLI-D Mobo
    Gigabyte 6600 128MB PCI-E Video Card
    (4) 9GB U160 SCSI HDDs in 36GB Raid 0 Array
    160GB Seagate S-ATA Drive w/NCQ
    Dell 20.1" Widescreen LCD

  5. #5
    Admin. Linux loser.
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    Bugbyte's Avatar
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    You can measure amperage using your multimeter, as long as your system isn't drawing too much for your multimeter to handle. They are fused to protect them.

    The DMM has to be hooked up in series (that is, the power flows through the meter) to measure this. Here's a discussion on it.
    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:
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