Is my PSU giving enough volts on the +5V rail?

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More about giving volts rail
  1. They are all almost out of spec... check in the bios
  2. I would be worried about the +12v spec... Should be within 5% - 11.15v is too low...
  3. Your 5V is way below spec. For 5V min voltage for TTL lodgic is 4.75 V.
    As jamesgoddard said your +12 V is ay low also. And Your system is at idle, Under load they will drop more. Hopefully the software is not providing a correct reading - Doubt computer would boot with 5 V at 3.7 volts. As chookman said, check in bios. Might also try different software.
    Also check voltages under loaded conditions (ie run a 3D app like ati tools - view 3d, or that furball benchmark program.
    Even better get a cheap DVM and measure the red and yellow -> black at one of the molex connectors
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