PSU voltages are way low, please help get right!

By teklord
May 29, 2010
  1. All,

    My voltages are way low in Speedfan and my system doesn't work right as well. I haven't run any business apps, but game emulators like Dolphin and PCSX don't work right at all. Games that should be @ constant 60 FPS, aren't. I know the PSU is fine because I used it in my last system and it worked just fine with normal voltage readings. Ever since I put it in the new build though, the voltages have been too low from the start. Do I need to replace the motherboard or is there a way I can fix this? Here are the readings and see the attached screenshot.

    Vcore1: 1.01V -12V: -4.13V
    Vcore2: 2.11V -5V: -0.78V
    +3.3V: 1.57V +5V: 5.54V
    +5V: 6.85V Vbat: 3.15V
    +12V: 4.74V

    thx all

    Attached Files:

  2. Route44

    Route44 TechSpot Ambassador Posts: 11,966   +70

    What is the make, model, and the amount of wattage output of your psu?

    Have you tested the psu with a multimeter?

    What is the difference between your old build and the new one? Does the new build require greater power?
  3. teklord

    teklord TS Guru Topic Starter Posts: 481

    This is what I bought about a year ago or so.

    I think it's the motherboard because the PSU worked 100% in the old system was in, but I get these readings from my new build.

    Haven't tested with a multimeter, don't really have spare cash for it.
  4. Route44

    Route44 TechSpot Ambassador Posts: 11,966   +70

    Link didn't work. Said the page is unavaliable.

    A decent digital multimeter costs about $20. At this point I doubt it is your motherboard because not all those voltage readings are linked to the mobo but to power molex, SATA drives, and video card, etc.

    Perhaps it could be the 20 pin connection.

    Again, what is the difference in hardware between the old and new and how demanding are the newer components?
  5. teklord

    teklord TS Guru Topic Starter Posts: 481

    Here's the specs from the Newegg site. I thought it might be the 20+4 power connection also, but I opened up the case and it appears to be snuggly in the connection slot. The newer is much more demanding than my old. The old was a P4 rig and the new is a Phenom II x2 rig. No OC on either one and 585W should be enough for all my components. The new rig is in the dropdown box by my name.

    Brand hec
    Model XPOWER585
    Series Orion
    Type ATX12V 2.01
    Maximum Power 585W
    Fans 2
    Main Connector 20+4Pin
    +12V Rails 2
    SATA Power Connector 3
    Over Voltage Protection Yes
    Input Voltage 100 - 120V/ 200 - 240V
    Input Frequency Range 47 - 63 Hz
    Input Current 10 /5A
    Output +3.3V@36A,+5V@36A,+12V1@19A,+12V2@20A,-12V@1A,+5 VSB@2.0A
    Approvals cUL, FCC, CSA
    Connectors 1 x Main connector (20+4Pin)
    4 x Peripheral
    3 x SATA
    1 x Floppy
  6. Route44

    Route44 TechSpot Ambassador Posts: 11,966   +70

    I can't say anything about the power supply though 39A on the 12v rails should be enough unless your video card is a beast. What motherboard and video card do you have installed and how much RAM?

    Edit Update: Never mind, I accessed your Syetem SWpecs. Didn't notice them before.
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