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Thread: Best PSU for Intel D945GCLF2 Dual-core Atom

  1. #11
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    Quote Originally Posted by txspazz View Post
    I can't recommend the M3-ATX at this point.
    Why? I thought you were using it right?

  2. #12
    Constant Bitrate txspazz's Avatar
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    As of yesterday I've had two perfectly fine hard drives experience catastrophic failures immediately after plugging in the M3-ATX. In both cases everything was working fine moments before using a desktop PSU. I wrote the first one off as a fluke but with the second failure occurring under the same circumstances, it is fairly obvious that it is a problem with the M3-ATX.

    The M3-ATX may work fine with this board, but at this point, I wouldn't recommend using the M3-ATX. I hope that Mini-Box rectifies this but I have not heard back from them yet.

  3. #13
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    Quote Originally Posted by txspazz View Post
    As of yesterday I've had two perfectly fine hard drives experience catastrophic failures immediately after plugging in the M3-ATX. In both cases everything was working fine moments before using a desktop PSU. I wrote the first one off as a fluke but with the second failure occurring under the same circumstances, it is fairly obvious that it is a problem with the M3-ATX.

    The M3-ATX may work fine with this board, but at this point, I wouldn't recommend using the M3-ATX. I hope that Mini-Box rectifies this but I have not heard back from them yet.
    Thanks for the update. I am going to hold off and see what other people are going to use for this board...

  4. #14
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    I used the M2-ATX with this board and it worked fine. I would suggest for you to get the same. Besides, the M2 has the extra port for the 4 pin power wire that this board needs as well. Do not go with the M1 since it doesn't have this 4 pin connection.

  5. #15
    Constant Bitrate txspazz's Avatar
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    I was able to get the second failed hard drive to work again (useing a desktop PSU). At this point, I am assuming that the M3ATX is under powered for this board and causing my problems.

    I am going to be switching to either the M2 or M4.

  6. #16
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    Jees, i hope you werent tyring a 3.5" hdd.

    You just need to google, then do the math.

    http://209.85.173.104/search?q=cache...cations+5v+12v

    m3-atx on 5v rail is only rated at 6amps. And i presume being the same form factor as pico the same ventilation proviso, so underrate by 25%.

    The board itself needs 4amps of 5v at load, a 2.5" hdd 0.5amps, a slimline optical upwards of 1amp, usb, gps blablabla you get the idea.

    m3 is out.

    Go m4 , or get a 12v connector adapter for the m1, or go bigger form factor in general. m2 should be ok too actually, its rated at 8amps 5v.

    Im running mine ok now on a morex dc baord that fits smaller morex cases , its labelled dd-itx90b, and is rated at 8amps at 5v. To get that sort of 5v rating its actually a 150W PSU.

    THis situation wont change until a better chipset comes along.

  7. #17
    Maximum Bitrate NiSlo's Avatar
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    M2-atx here.
    Using it with no problems.
    I installed my carpc into my pet Kangaroo, mate.

  8. #18
    Constant Bitrate txspazz's Avatar
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    Quote Originally Posted by webwiznz View Post
    Jees, i hope you werent tyring a 3.5" hdd.

    You just need to google, then do the math.

    When I got the M3, the only numbers available for this board were the ones posted at SPCR.

    Based on your tests and my first hand experience, yes, the M3 doesn't have enough power.

  9. #19
    Constant Bitrate txspazz's Avatar
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    Can somebody give me a reason NOT to use the M4 in favor of the M2. Mini-Box seems to think I need the M2.

    Emails yesterday and today:

    Me
    Could you please fill me in on the status of this return? USPS tracking
    shows that it was delivered on the 22nd. Your system shows it as
    "Pending
    Receipt".
    The RMA # is xxxx.

    Thank you


    Mini-Box
    We got the RMA - so you would like to exchange for M2ATX? I will ship it out

    upon your confirmation.

    Thanks,
    Frank.


    Frank,
    Considering the 5V demand it appears the D945GCLF2 has, I think I want to play it safe and go with the M4-ATX. The USB connection is included with the M4 correct?



    Steve,
    The technician believe that the M4ATX is overkill - meaning you don't need
    such a powerful device to power up the intel board - customer's being doing
    fine with just 90w...
    I would suggest an M2 - if you want higher power than M3.
    http://www.mini-box.com/M2-ATX-160w-...=8&category=13
    Frank.


    Since the time I ordered the M3-ATX for this project, Intel has released the following
    Intel Desktop Board D945GCLF2 Technical Product Specification
    For example, for a system consisting of a D945GCLF2 board (with integrated Dual-
    Core Intel Atom processor at 8 W), 2 GB DDR2 RAM, one hard disk drive, one optical
    drive, and all board peripherals enabled, the minimum recommended power supply is
    80 W. Table 22 lists the recommended power supply current values.
    Table 22. Recommended Power Supply Current Values
    Output Voltage 3.3 V 5 V 12 V1 12 V2 -12 V 5 VSB
    Current 0.52 A 7.34 A 1.17 A 0.54 A 0.03 A 0.25 A
    The above is the exact configuration I have plus a large handful of USB devices.
    I see that you are selling the VoomPC-2 with the M2-ATX. Assuming that the motherboard and M2 are both rated conservatively, they should work together.
    I am leaning towards a margin of overkill as my project is already delayed a month due to this issue. Other than it being “overkill” is there any reason not to use the M4-atx?



    No, there's nothing wrong with M4 - we just didn't think you need to pay the extra $30 for an intel board that doesn't require it. I will ship you the M2ATX as replacement.

    Frank.



    The price difference is only $20 (at least the way I do math). The M4 gives me a big safety margin while the M2 is within less than a amp (on the 5V) of what intel recommends. The M4 also has the USB interface which I guess could be handy.

    Is there something I'm missing? Will the M4 drain a battery faster or something along those lines?

  10. #20
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    I have been using the M4-ATX with this board for a month and no problems. I wanted to be able to use the PSU to power other items and not worry about using too much. Is it overkill for just the intel board yes ... but I liked the M4's features and being able to power a lot of other devices.

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