What is the best Brand & ( 400-500 ) Watts for a Power Supply for a Desktop Computer?
My bed shares the same room with my computer running 24/7 and I’m quite happy with the power supplies from be-quiet. The keep their promise given by the name and I never experienced any problems with the supply of power even during lighnings or because of power-consuming parts like the graphics-card (that has two power-connections to get enough amperes).
Look through the user reviews of power supplies on Newegg. They have a terrific selection, good prices, the best reputation on the web, and the user reviews are very useful.