Quad core processors, multiple video cards, and multiple hard drives are common components in computer enthusiasts setups. Providing quality power to these components is not resolved by buying the cheapest, highest rated power supply (PSU) you can find. The proper solution is to find a PSU that is reputable and efficient for your setup. Many PC builders are clouded by the cost of high quality PSUs. Instead of buying a proper PSU, builders will sometimes skimp on the PSU cost to be able to get a faster video card or more components. The fact is, the PSU is the most important piece of hardware in every computer.
Being the device that powers the entire computer, it is very important to get a PSU that will satisfy your hardware's needs. Delivering steady, even power to the hardware is very, very important. Poor power delivery to the hardware will cause irreversible damage; fried hardware, short outs and even fires can result from poor quality PSUs. Selecting the proper PSU for a build is vital and should never be overlooked.