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+12v limits

  • 22-06-2003 5:57pm
    #1
    Wavey
    Registered Users, Registered Users 2 Posts: 861 ✭✭✭


    My +12v line is dropping down as far as 11.75 at times. Is this enough of a drop to affect cpu/ram performance?

    Its a 300 Watt supply


Comments

  • #2
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 93,582 Mod ✭✭✭✭Capt'n Midnight


    It's for fans and drive motors and stuff (and ~9v for serial which also explains the -12V too)

    Have you checked with a meter ?
    Have you tried it when the HDD is powered down.. - should be 12.1V (the 0.1 is for voltage drop in the cables)


  • #3
    Inspector Gadget
    Registered Users, Registered Users 2 Posts: 1,393 ✭✭✭Inspector Gadget


    The ATX spec says that +/-5% is okay on the 3.3, 5 and 12 lines, which means it'll be fine unless it drops below about 11.4v - or at least that this is what your components should have been designed to handle...

    (See the table on page 10 of http://www.formfactors.org/developer/specs/atx/ATX12V_1_3dg.pdf if you're interested)

    HTH,
    Gadget


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