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Thread: M2 Atx

  1. #1
    FLAC
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    M2 Atx

    I'm building a new system for my new car.
    I'm thinking of getting the Intel Dual Core E2140 and run it off an M2 ATX.
    I looked a the power calculator and it said that the E2140 runs at about 84W, and the M2ATX is rated at 8Ax12V=96W . I'm just wondering if this would work with the M2ATX well? Anyone has experiences with this chip and the M2ATX?
    Thanks.

  2. #2
    Neither darque nor pervert DarquePervert's Avatar
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    You'd definitely be pushing it.
    Plan your system carefully.
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

  3. #3
    FLAC
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    how come? i have about 12W to spare on the 12V line. Shouldn't that be sufficient?
    Thats my logic, and thats why i need a second opinion.
    I've been running a 2.0Ghz Celeron (83W) on my OPUS 150 for the last 2 year, never a problem, but i'm not sure if the M2ATX would do as well as the opus150.

  4. #4
    FLAC is for flaccid parksgm's Avatar
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    Quote Originally Posted by Punky View Post
    how come? i have about 12W to spare on the 12V line. Shouldn't that be sufficient?
    Thats my logic, and thats why i need a second opinion.
    I've been running a 2.0Ghz Celeron (83W) on my OPUS 150 for the last 2 year, never a problem, but i'm not sure if the M2ATX would do as well as the opus150.
    From reading other M2 users' posts and from my own experience, it seems that the M2's maximum ratings are actually close to the true maximum power the M2 can provide. In addition, the M2 does not seem to offer very substantial protection for connected devices in situations in which the devices require more power than the M2 has available. It seems that if the M2 is overdrawn, even by a small amount, the connected devices (motherboard, CPU, harddrives, whatever) can suffer damage and/or failure.

    I was running a system with an M2 that theoretically was at the limit (but not over) of the M2, that was suddenly and completely destroyed after the system had been running for 10 minutes stably. The M2 suddenly began smoking, then turned off. Two board mounted components on the M2, the M2 itself, and the processor, motherboard, and hard drive were all useless afterward.

    12 watts is not "much" to spare. 12 watts is only 1 amp at 12 volts, and so connecting any other devices to the 12V rail in addition to your processor could easily result in drawing more than 8A of current. Other common devices that use 12V include 3.5" hard drives, full size optical drives, and LCD screens (some people run their LCDs from the regulated 12V of the computer power supply instead of the widely variable car supply in the interest of longevity...but it's likely overkill). Hard drives and optical drives can easily draw more than 1A (=12 watts) from the 12V rail at spinup/bootup. So, to know whether the M2 is sufficent, you would need to determine the current draw of ALL of the 12V devices in your system (motherboard included, if it uses 12V).

    A typical overdraw scenario would occur at bootup...you hit the power button, and your processor is maxed and consuming a full 83 watts (while trying to start the computer as quickly as possible), your hard drive is spinning up from zero (consuming maximum current), and any optical drives you have connected are also consuming maximum current.

    My M2 was replaced under warranty, and after reading about other, similar failures on this forum (search), I sold the replacement on ebay and purchased a DS-ATX. The DS-ATX manual describes the overcurrent protection built into the supply in detail, and states that the DS-ATX was designed specifically not to cause damage to connected components should the supply be overdrawn. The DS-ATX has been running my new system (2.4ghz P4/3.5" 80GB HDD/LCD screen) for six months now with ZERO issues...it seems to be a great power supply, and I highly recommend it over the M2

    Hope this helps...

  5. #5
    FLAC
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    Thank you very much for your detailed reply.it really helped me understand my problem. I might have to reconsider which processor to use or upgrade to an dsatx which is a little more than I would want to spend.

  6. #6
    FLAC is for flaccid parksgm's Avatar
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    Quote Originally Posted by Punky View Post
    Thank you very much for your detailed reply.it really helped me understand my problem. I might have to reconsider which processor to use or upgrade to an dsatx which is a little more than I would want to spend.
    No problem...just don't want anyone else to have to go through the same disappointment I did (all of that happened about 2 hours after I finally had my system completely installed in my car).

    I'm not saying the same thing would happen to you of course...just consider your options carefully. In retrospect, I spent much more money and time replacing my system than the cost difference between the M2 and DS-ATX.

  7. #7
    Variable Bitrate
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    I just want to say that if you have a system that does not require much power, the m2 atx has been working perfectly for me for over 2 months or more now.

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