Power supply fluctuation

By kwspony ยท 4 replies
Apr 29, 2007
  1. Realistically, how much fluctuation should there be in a power supply? My 12v rail has dropped to around 5v. I am getting random crash's that I can't figure out as they are always different causes. Now I am wondering about the power supply. Ram memtest and RAM is good. I have 2 SATA drives, 2 DVD drives, floppy, creative x-fi sound card and I am using a 480w power supply.
  2. raybay

    raybay TS Evangelist Posts: 7,241   +10

    Any power supply that allows the 12V to drop to 5V under load should be replaced... but a 480 Watt unit should be ok. There are power supply testers available for $15 at Outpost, Frys, CompUSA, etc.
    What are you using to determine this fluctuation?
  3. kwspony

    kwspony TS Booster Topic Starter Posts: 121

    A program called Everest.
  4. zipperman

    zipperman TS Rookie Posts: 1,179   +7

    My tester

    Do you happen to have an asus mbd ?
    It has Probe to install and check votage.
    If not see if your mbd came with a test utility or a download.
    Best to use theirs.
    The line should stay straight.A slight movement is ok but the voltage
    should be close to default shown.
  5. zipperman

    zipperman TS Rookie Posts: 1,179   +7

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