Power Supply out of the stable voltage parameters must be changed when they exceed 10% of the voltage stability. Many change them even if they exceed the parameters by 5%.E.g:If on the 12 volt line we see voltages of plus or minus 10% then it is necessary to orient yourself towards changing the source. That is, if instead of 12v we will see over 13.2v or less than 10.8v, then it is appropriate to focus on another source. Or, as a precaution, you can change them if they deviate from the parameters by 5%. The same is true for the rest of the 5v, 3.3v, 1v, etc. lines. Take a computer and calculate how much they came out of the standard parameters. You can read these voltages either from uefi / bios or in software like AIDA64, but the safest way is with the multimeter.