P4P800 E de luxe System failed CPU test.

Discussion in 'Asus' started by Henk WIeland, Jul 1, 2004.

  1. Henk WIeland

    Henk WIeland Guest


    I've read several postings with the same problem i'm having, but no
    defintive solution.
    System Failed CPU test message from speech reporter.
    CPU is OK in other boards.
    Some say there is a problem with the Power supply.
    Others say there is problem with the AGP card.
    I read messages about the weight of the cooler being a problem.

    The most likely cause wich i can't test is that i have no 4 pin 12V
    connector on my PSU. Is this manadatory?

    Or is is it just another RMA case?

    Henk WIeland, Jul 1, 2004
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  2. Henk WIeland

    Rob Hemmings Guest

    I'd say the lack of a 4 pin connector (which supplies power
    to the CPU) is probably the cause. Without it, all the CPU
    current (P4s are quite power hungry) has to flow through the
    normal ATX power connector and then the mobo tracks.
    I've even heard of cases where the mobo ATX connector got
    so hot (without the 4 pin CPU power plug connected) that it
    literally melted, so it's possible that you have damaged the mobo :(
    I'd try RMAing it and get yourself a new P4-ready PSU anyway
    (they're not that expensive - just make sure it supplies at least 16A
    on the +12V line and is rated at 300W or (preferably) higher.)
    Rob Hemmings, Jul 1, 2004
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  3. Henk WIeland

    Paul Guest

    Not to worry. The single +12V pin on the ATX20 pin connector is
    not connected to the processor power circuit, so you cannot burn
    it. There were a few motherboard designs that made that mistake,
    but I think that is a thing of the past. The 2x2 ATX12V is the
    sole source of power for the processor - if it is disconnected
    then the processor gets no power at all.

    I measured the power flowing in the single +12V wire on the ATX20
    pin connector on my system, and it measured 0.41A. I think that
    is the current to run my Zalman 7000A fan.

    Your existing power supply probably doesn't have enough current
    capability on the +12V to run your system. So, even if you made
    an adapter, to go from two drive connectors to a 2x2 ATX12V
    connector, the power supply would probably be overloaded on
    +12V. A 15 or 16 amp limit on the power supply +12V output is
    enough for a basic computer system with high end P4. With
    Prescott, you may want a little bit more. Similarly, if you
    have a lot of disk drives.

    Paul, Jul 1, 2004
  4. Henk WIeland

    Henk WIeland Guest

    Ok guys thx for the input.
    So it is mandatory?
    Then i will go out and buy myself a new PSU.
    But i will need i really quiet one. Any recommandations?
    Not to expensive ofcourse (i am Dutch you know ;-)).

    Henk WIeland, Jul 2, 2004
  5. Henk WIeland

    Paul Guest

    As the 2x2 ATX12V connector is the only way for the processor to
    get power, it is mandatory.

    Antec, Enermax, Fortron/Sparkle, Seasonic are a few names.
    Availability of power supplies varies from country to country,
    so you may have a different set of choices than the rest of us.
    Tomshardware has had a few reviews of power supplies, and that
    may give you some ideas of which ones are good and bad.

    Check the "how-to" section of Toms. I found these via the article
    search engine on the web page, using search term "power supplies".


    This one has a good efficiency rating - FSP400-60PFN :

    With any power supply, don't buy them by total power alone.
    Make sure they can supply at least 15 amps on the +12V output,
    for a P4 or an Athlon64 board. (The K8V boards use that 2x2
    connector also.)

    Paul, Jul 2, 2004
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