on the acer it says "industry standard 300 watt".
that also means "over-rated cheap junk 250w" seeing that its an acer
can you please provide a picture of the back of the computer? and the power supply(youll have to open the side). i want to know if its a standard atx psu, then i would say upgrade the psu to something better, like the antec 380d. or better.