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Thread: OPUS 120 and VIA CN-13000: Enough Power?

  1. #1
    Newbie kftqq's Avatar
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    Question OPUS 120 and VIA CN-13000: Enough Power?

    Just in the process of buying all my components and I just want to be sure that I've done my sums right with regard to choosing my power supply. I've searched and can't find anyone using this combination of power supply and mobo...

    I will be running:
    VIA CN-13000 motherboard (0.8 A on 3.3v, 3.8A on 5v, .09 on 5vSTBY and 0.31A on 12v, on full load)
    Samsung Spinpoint M60 120GB HD (max 4.5W on 5v, which is 0.9A, right?)
    512MB ddr2 ram
    Creative Audigy SE soundcard (about 10W (from the 5v rail I assume) = 2A)

    I'm intending to power my monitor (8" LinITX) off it's own power supply so I'm not taking that into account.

    The OPUS 120w power supply will supply the following currents...
    3.3v rail: 8A
    5v rail: 8A
    5v standby: 1.5A
    +12v rail: 3.5A
    -12v rail: 0.5A

    So, according to my sums, I recon that I should have a maximum consumption of:
    0.8A on 3.3v
    6.7A on 5.0v
    0.9A on 5.0vSTBY
    0.31A on 12v

    which should leave plenty of headroom, right?

    Have I done my sums correctly and is my understanding of the electronics correct?

    Thanks for your time

    Rob

  2. #2
    Neither darque nor pervert DarquePervert's Avatar
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    YEs, you should be fine.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  3. #3
    Variable Bitrate afterdigital's Avatar
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    Quote Originally Posted by kftqq View Post
    The OPUS 120w power supply will supply the following currents...
    3.3v rail: 8A
    5v rail: 8A
    5v standby: 1.5A
    +12v rail: 3.5A
    -12v rail: 0.5A

    Rob
    what the heck is "rail"? - i read this everywhere but am not clear on what it is referring to. I would like to provide 5v to 3 of my usb hubs. I feel that my devices are not working properly and would like to add the additional power to compensate for so many usb devices. However, what the heck is "rail"? is this the extensions that one connects to devices such as IDE CDROM and IDE hardDrives? IF so, what's the difference between the standby and regular? should i use one and not the other?

    thanks, this is a great forum. can't wait to finish my project and post it for review!

  4. #4
    Neither darque nor pervert DarquePervert's Avatar
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    A rail is a power rail. It's an output from a computer power supply at a specific voltage required by the PC.
    An ATX power supply outputs three or four rails... One or two rails output 12v (in the case of a PSU w/ two 12v rails, one is dedicated to the CPU/motherboard and the other for peripherals), one 3.3v and one 5v.

    It's less of a physical thing and more of a concept.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  5. #5
    Newbie kftqq's Avatar
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    Sweet... Thanks for the reply. Just about to order all my stuff... The wait will be torturous!!!

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