READ THIS FIRST: Small tutorial on Computer ATX Power Supplies. How to use them, how to connect them in series, in parallel. What is 12V rails? Is it possible to connect 12V rails together? ATX connector wiring explained. What is difference between old computer power supplies and new ones? And finally how to make Lab Bench Power Supply from Computer ATX Power Supply. WARNING: Computer power supply has a BIG HIGH VOLTAGE capacitors inside, that could hold a potentially DEADLY CHARGE! DON'T TAKE APART POWER SUPPLY IF YOU DON'T KNOW HOW TO WORK WITH MAINS-RATED EQUIPMENT!!! ADDITIONAL INFO & PHOTOS: jumperone.com/2011/06/atx-power-supply-tutorial/ FREQUENTLY ASKED QUESTIONS: jumperone.com/2012/12/converting-atx-power-supply-to-bench-power-supply-faq/ ATX WIKIPEDIA PAGE: en.wikipedia.org/wiki/Atx And you can find some more cool stuff on www.jumperone.com/