The Cougar PowerX 550W power supply obviously is a product designed to entice users into upgrading from a cheap unit of unknown (and, usually, extremely poor) quality to one of acceptable quality and performance standards. Considering that the MSRP of the power supply is just $69.99 and that the actual retail price usually is quite lower than the MSRP, the PowerX 550W might actually be a very good deal for casual users and gamers on a very tight budget. On the other hand however, the saying you get what you pay for fits perfectly in this case..."
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips