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Thread: *noob* Power Requirement

  1. #1
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    *noob* Power Requirement

    Dear all,


    My current setup:

    1 x VIA PM8M3-V Mobo
    1 x Intel Celeron D 331 2.66Mhz
    1 x DDR400 512mb RAM
    1 x Maxtor 3.5" 2mb 7500rpm HDD
    1 x Normal sized DVD Combo drive (IDE to USB connector)
    1 x powered USB 4 port hub
    1 x Liliput 619
    1 x USB BT
    1 x USB WiFi

    Soon to add list:

    GPS
    OBD

    I've checked my power requirements on the various sites posted here and my consumption varies (Note: Haven't added in Liliput 619 power consumption)

    From

    186watts (http://www.journeysystems.com/power_...calculator.php)
    166watts (http://carpc.kyferez.com/Tools/PSUWattageCalculator.php)
    103.5watts (Required CPU power: 91watts and Total Required PSU power: 155.24 watts) (http://www.ohmygodmyarmfelloff.com/MP3Car/PSUpower.asp)

    With the M2ATX power supplies:

    12v rail = 8A (96w)
    3.3v rail = 8A (26.4w)
    5v rail = 8A (40w)

    Well, can the M2ATX coop with this kinda requirement?


    Thanks in advance...

  2. #2
    Neither darque nor pervert DarquePervert's Avatar
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    You're on teh right track.
    Ou may have missed this FAQ, I think: FAQ: Will <insert PSU model> Power Supply work with my system?

    Your CPU draws around 84w all by itself. That's pushihng the envelope, and you'll only have 12w for any other parts that pull 12v (screen, 3.5" HDD, normal-sized DVD drive, etc.) I figure this will come close to, if not overload your M2ATX.
    I'd look into a higher-rated PSU (Opus 250w or DSATX) or a CPU with a lower power draw for that motherboard.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  3. #3
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    Quote Originally Posted by DarquePervert View Post
    You're on teh right track.
    Ou may have missed this FAQ, I think: FAQ: Will <insert PSU model> Power Supply work with my system?

    Your CPU draws around 84w all by itself. That's pushihng the envelope, and you'll only have 12w for any other parts that pull 12v (screen, 3.5" HDD, normal-sized DVD drive, etc.) I figure this will come close to, if not overload your M2ATX.
    I'd look into a higher-rated PSU (Opus 250w or DSATX) or a CPU with a lower power draw for that motherboard.
    Hi Darque,

    I've read the link you posted too. But it didn't state the processor I'm having? Not much of a computer guy, but it states Socket 775 on the specs of my CPU. Refering to your post of "84w", I'm guessing I'm using a Prescott processor?

    Looking at the link you provided again, it doesn't matter if I get a lower speed CPU, since it consumes the approx same amount of wattage, am I right on this?

    Hope this isn't spoonfed, but mind point me to a website that gives me the CPU choices that's using the same socket?


    Thanks in advance...

  4. #4
    Neither darque nor pervert DarquePervert's Avatar
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    Quote Originally Posted by SentraVIP View Post
    Hi Darque,

    I've read the link you posted too. But it didn't state the processor I'm having? Not much of a computer guy, but it states Socket 775 on the specs of my CPU. Refering to your post of "84w", I'm guessing I'm using a Prescott processor?

    Looking at the link you provided again, it doesn't matter if I get a lower speed CPU, since it consumes the approx same amount of wattage, am I right on this?

    Hope this isn't spoonfed, but mind point me to a website that gives me the CPU choices that's using the same socket?


    Thanks in advance...
    Other PRescott CPUs draw comparable amounts of power, but it's also very likely that your motherboard will support other configurations of P4 CPU that draw less power. Look for other socket 775-compatible CPUs.

    The Processor Electrical Specifications will show you. It's listed on that site as the Socket T. Most of the CPUs that use Socket T are higher-power CPUs, which suck lots of juice.

    My suggestion would be to bite the bullet and choose a different motherboard/CPU combination that's designed for lower-power use.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  5. #5
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    Hi guys... Just an update.

    I've successfully connected the Lilliput, powered using the M2ATX as per my list of hardware above. Guess I'm lucky.

    Got another question though,

    I've notice I've got my screen flickering. Is that normal? Or is that some sorta sign that I'm on the verge of power consuption?

    I'm currently powering it off from my work bench using an ATX PSU connected to the M2ATX. Well, it's working but am wondering if this means it'll work on the car too?


    Thanks!

  6. #6
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    Not to get off topic too much but did you need that fan control cable in the faq in order to get youratx power supply to realize it is on and provide power to the m2?

  7. #7
    Maximum Bitrate JimmyFitz's Avatar
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    Quote Originally Posted by SentraVIP View Post
    Hi guys... Just an update.

    I've successfully connected the Lilliput, powered using the M2ATX as per my list of hardware above. Guess I'm lucky.

    Got another question though,

    I've notice I've got my screen flickering. Is that normal? Or is that some sorta sign that I'm on the verge of power consuption?

    I'm currently powering it off from my work bench using an ATX PSU connected to the M2ATX. Well, it's working but am wondering if this means it'll work on the car too?


    Thanks!
    Try changing the screen refresh rate to something other than 60 Hz. that usually helps.

    The symptoms of an overloaded M2 are things like: shuts off unpredictably just after power up, cycles on and off, fries some parts on the M2, or fries the mobo. Are you sure you want to risk it?
    ~Jimmy

  8. #8
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    Or just early expiration.
    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.
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  9. #9
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    Quote Originally Posted by ckny View Post
    Not to get off topic too much but did you need that fan control cable in the faq in order to get youratx power supply to realize it is on and provide power to the m2?
    Hi!

    I just hack the ATX PSU and short the pins to get power to the M2ATX as discribe in the FAQ... I also have a switch on the IGN wire.

  10. #10
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    Quote Originally Posted by JimmyFitz View Post
    Try changing the screen refresh rate to something other than 60 Hz. that usually helps.

    The symptoms of an overloaded M2 are things like: shuts off unpredictably just after power up, cycles on and off, fries some parts on the M2, or fries the mobo. Are you sure you want to risk it?
    I've changed the refresh rate. Still there's flickering. Maybe due to electronic interference? Everything's on a small table now.

    Well, I don't have any of the symptoms you mentioned now. But can I safely assume that it will be as good when I install it in the car?


    Thanks!

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