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  • 10% has always been concidered acceptable, I set warnings for such things at 5% , and some of this stuff can be off almost 20% before there is a real problem (because of additional conversions going on) . How did you read the voltages though? the 3 easy ones, you can get a volt meter out and you will see the sencors themselves reading voltages to programs are not 2 digit accurate?
    – Psycogeek
    Commented Aug 16, 2015 at 18:39
  • These numbers are within spec. ±5% is okay, and motherboards are built to accept these tolerances. Some variation under load is also normal. There should be absolutely no harm to the computer from these voltages.
    – bwDraco
    Commented Aug 16, 2015 at 18:54
  • Voltage readings from internal sensors in computers are not reliable. If you want accurate values, use a calibrated multimeter.
    – Daniel B
    Commented Aug 16, 2015 at 22:26
  • 1
    @gcb You could use the on-board SATA power connector. It provides a wide range of different voltages to measure and have fun. ;)
    – Daniel B
    Commented Aug 17, 2015 at 19:42
  • 2
    Read again: “When you use the DC-in power adapter, please use the onboard SATA power connector to get the power for HDDs.”
    – Daniel B
    Commented Aug 18, 2015 at 6:40