Good power supply for gaming computer?

hi there,
to answer your question properly it is imperative to know what hardware you intend to run.What processor you are thinking about(will you be overclocking),what video card are you thinking of(1 or 2 video cards?),how many hard drives,how much memory and what other hardware such as printer/scanner,how many dvd,cd drives you intend to install and what size is the case(reason being you want to ensure the pwr supply you purchase has long enough cables to be routed neatly in order to maintain proper airflow (I rec a modular pwr supply) A 300 watt pwr supply is not anywhere near sufficient to run even a low end system.Look into the corsiar hx620 for a good solid starter which promotes a clean install and is very efficient for its size that is of course if you are reasonable with your hardware selections.Thats my 2 cents ,I hope i have been somewhat helpful.