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Thread: I finally tested the 12v rail on my psu with a multimeter

  1. #1
    Senior Member Mithrandir's Avatar
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    Talking I finally tested the 12v rail on my psu with a multimeter

    The 12v rail on my Xigmatek NRP-MC651 psu shows a relatively low reading. In the bios it's 11.52v and even lower in XP/vista, showing 10.91v to 11.0v usually. I've always been concerned but also knew software cannot be relied upon.

    See pic:



    So, I decided to test the rail this morning using a cheapy Multimeter brought from maplins a while back when they were on a BOGOF offer (for fiver or so)

    Here are my findings:

    Bootup


    Start of Furmarking


    Near end of Furmarking


    Glad they are near 12v and not 11.52v or even worse at 11.0v/10.91v
    Cavalier-X: Biostar TP45-HP ¦ E4600@3.1ghz - Xigmatek Red Scorpion (OCZ Freeze) ¦ OCZ ReaperX 2x2gb (792mhz @ 4-4-4--12) ¦ Xigmatek NRP-MC651 ¦
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  2. #2
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    Re: I finally tested the 12v rail on my psu with a multimeter

    The ATX requirement lists 11.4 - 12.6volts as being acceptable for 12 Volt rails so, Either way there was nothing to worry about.

  3. #3
    Senior Member Mithrandir's Avatar
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    • Mithrandir's system
      • Motherboard:
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      • CPU:
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      • Memory:
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      • Graphics card(s):
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      • Case:
      • Coolermaster Cavalier 3 silver (windowed)
      • Monitor(s):
      • Fujitsu Siemens SCALEOVIEW D22W-1

    Re: I finally tested the 12v rail on my psu with a multimeter

    Quote Originally Posted by Sputnik View Post
    The ATX requirement lists 11.4 - 12.6volts as being acceptable for 12 Volt rails so, Either way there was nothing to worry about.
    Yup, but concerned it was closer to the min spec value which is not good, and inconsistencies between the software and bios value I decided to check.
    Cavalier-X: Biostar TP45-HP ¦ E4600@3.1ghz - Xigmatek Red Scorpion (OCZ Freeze) ¦ OCZ ReaperX 2x2gb (792mhz @ 4-4-4--12) ¦ Xigmatek NRP-MC651 ¦
    Palit 8800gt ¦ X-fi Fatal1ty Gamer ¦ Coolermaster Cavalier 3 (Silver/Windowed) ¦

    Poseidon Magma: MSI P45 Zilent ¦ E6300@3.0ghz - Coolermaster Hyper 212 (MX-2) ¦ Corsair 2x2gb (880mhz @ 5-5-5-15) ¦ Corsair HX450w ¦
    xfx 9600gt Alphadog edition (780/1950/1000) ¦ X-fi Gamer ¦ Gigabyte Poseiden ¦

  4. #4
    Admin team peterb's Avatar
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    Re: I finally tested the 12v rail on my psu with a multimeter

    With a cheap £5.00 uncalibrated multimeter - the most you can say is that it is "around" 12 volts - but then that is pretty much all you need to know anyway!

    But as you say, the software monitoring is pretty inaccurate anyway, depending on how lucky yopu are with the sensors.
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