Is a psu with 3 12 volt rails good?

Edwina Fu: The more 12v rails a psu has, the less efficient it is. 12v rails are split to save on costs. And by splitting the 12v rail, it loses alot of amperage.The psu you linked in last question, has a total of 37A on the 12V rail. Thats 444W.Which that would likely not be enough for peak loads, and if it does happen to be enough you will be really running your psu at 90%+ loads, which isnt good.You cant buy a cheap psu, and expect to use higher end hardware, and better get the idea of ever overclocking completely out of your head...You should be going for something like this http://www.newegg.com/Product/Product.aspx?Item=N8...especially if you have any thoughts of overclocking.This psu has 54A on the 12v rail (648W).But overclocking requires not only a decent psu, but a motherboard with a good power phase and vrm cooling, aswell as good case cooling and a good cpu cooler....Show more