Over the past few years the hardware that we use has gone up and down in how much power it needs to be feed. Cooler Master understand that when your hardware is hungry you need to feed it. That is why they gave us the Cooler Master M2 Silent Pro 1500 Watt Power Supply.
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