Try throttlestop. Re: The AC power adapter wattage and type cannot be determined DC jack is busted.
Hello! I had a short circuit in the power connector to Optiplex 3070 micro. The motherboard smelled quite bad, but all still working fine except one thing: now I see the message 'The AC power adapter wattage and type cannot be determined' even when using other original power supplies (I have many 3070m's and tried their PSU). The worst thing is CPU now working only at base clock 800mhz even when I disabled that alert in bios.Are there any software solutions to this CPU speed problem? Because I can't repair/replace the motherboard in place where I live. 
Dell optiplex 3070m psu trouble