For now I suggest that you restore the MBs default settings in the BIOS as the extra power going to the CPU will not do it any good.
The fan readings not showing can sometimes happen due to the MB not having the required sensors, this is common with older MBs so don`t worry.
The low amps on the PSU are still the most cause for concern and until you have a PSU that provides the right amount of power (including the amps on the +12V rail) you cannot rule out the PSU as the cause and meanwhile by being underpowered the PSU is damaging all of your hardware.