Best PSU/Power Supply - PC Gaming 2011 - 2012

One of the most important pieces of hardware on your computer is your power supply. It runs power to the other components of your computer by switching the power that comes from your outlet (AC) to the direct current (DC) which your computer needs. Without it nothing else would run and a poor quality or failing power supply can potentially put unwanted strain on expensive computer parts and components.

Even if you know how to calculate your power need exactly your PSU should never be loaded to 100 percent of its capacity. For this reason when you calculate your power needs you'll always want to plan ahead and buy a power supply that takes care of your current needs and more plus any upgrades you plan on in the future.

Here are a few calculators that are useful in determining how much power you'll need for your PC build:

Thermal Take Power Calculator

Other useful PC power calculators:

http://www.extreme.outervision.com/PSUEngine
http://educations.newegg.com/tool/psucalc/index.html
http://www.journeysystems.com/power_supply/

A general rule I use if I'm doing a single GPU build is to use a minimum of 550 watts (I prefer at least 650 watts for high-end desktops), and for dual SLI/Crossfire machines 750+ watts at least. This will vary somewhat depending on what components you end up adding.

I'll just assume that those who plan on an advanced PC build with more than 2 GPU know what they'll need, but if you don't, then the calculators above should give you a good idea.

After you have your number

It's always a good idea after you have a number in mind to add 50-100 watts for single GPU builds and 200+ watts for multiple GPU builds.

*Tip to remember from Thermaltake:

"If you are planning to build a high end gaming system, total Amperage available on the +12V rails-and how that capacity is distributed-could be as or more important than total Watts of power."

How to Install Your Power Supply

Power supply installation is really pretty simple because the PSU can only go in the top or bottom portion of your case. Once you've removed the side panel of your case, slide it in and then use the 4 screws that your power supply came with to lock it into place. If you've installed it incorrectly the screw holes won't line up.